JP4283871B2 - Plasma display panel - Google Patents

Description

  The present invention relates to a plasma display panel.

  A plasma display panel (hereinafter also referred to as “PDP”) has features such as being thin and capable of displaying a large screen relatively easily, having a wide viewing angle, and having a high response speed. At the same time, it is being developed as a flat display.

  FIG. 12 is a perspective view showing a configuration of one display cell in a conventional three-electrode surface discharge AC type plasma display panel.

  As shown in FIG. 12, in this display cell, a front substrate 351 and a back substrate 352 are provided in parallel to each other.

  The front substrate 351 includes an insulating substrate 302 formed of glass or other transparent material, a plurality of scanning electrodes 303 and a common electrode 304 formed on the surface of the insulating substrate 302 facing the back substrate 352, and the scanning electrode 303. Trace electrode 305 formed on top, trace electrode 306 formed on common electrode 304, dielectric layer formed on insulating substrate 302 covering scan electrode 303, common electrode 304, trace electrodes 305 and 306 312 and a protective layer 313 formed on the dielectric layer 312.

  The scanning electrodes 303 and the common electrodes 304 are alternately arranged in parallel with each other at a predetermined interval.

  The trace electrodes 305 and 306 are formed on the scanning electrode 303 and in order to reduce the electrode resistance value of the common electrode 304.

  The protective layer 313 is formed to protect the dielectric layer 312 from discharge, and is made of, for example, magnesium oxide (MgO).

  The back substrate 352 includes a plurality of insulating substrates 301 made of glass or other transparent material, and a plurality of back substrates 352 formed on the surface of the insulating substrate 301 facing the front substrate 351 so as to extend in a direction perpendicular to the scanning electrodes 303 and the common electrodes 304. Data electrode 307, dielectric layer 314 formed on insulating substrate 301 so as to cover data electrode 307, partition 315 formed on dielectric layer 314, the surface of dielectric layer 314, and side surfaces of partition 315 And a phosphor layer 311 formed on the substrate.

  In the cell shown in FIG. 12, the back substrate 352 is formed as a transparent substrate, but the back substrate 352 is not necessarily transparent.

  The partition wall 315 secures a discharge gas space and partitions the display cell (pixel) 308.

  When viewed from the direction perpendicular to the surface of the insulating substrate 301, the shape of the partition wall 315 is a grid pattern (lattice shape). The partition wall 315 includes a vertical partition wall 315 a extending in the same direction as the data electrode 317 extends, and a vertical partition wall It consists of a horizontal partition 315b extending in a direction orthogonal to the direction in which 315a extends.

  The height of the vertical partition 315a and the height of the horizontal partition 315b are substantially equal to each other, and the height from the surface of the insulating substrate 301, that is, the total film thickness of the dielectric layer 314 and the partition 315 is, for example, 120 μm.

  The display cell 308 is filled with a discharge gas made of helium, neon, xenon, or another rare gas or a mixed gas of these rare gases. The phosphor layer 311 emits visible light 310 in response to ultraviolet rays generated by the discharge of the discharge gas.

  Note that a region between the front substrate 351 and the rear substrate 352 is divided into a central display region and a non-display region that is a peripheral portion surrounding the display region, and an image is displayed in the display region. The barrier ribs formed in the non-display area are called dummy barrier ribs. When the plasma display panel is manufactured, the display area is protected after the plasma display panel is manufactured in order to uniformly form the barrier ribs in the display area. It is formed in order to suppress entry of impurities into the region. The dummy partition walls are usually provided in about 1 to 2 rows.

  FIGS. 13, 14 and 15 are views showing a method of manufacturing the conventional plasma display panel shown in FIG. 12, wherein (a) of each figure is a plan view showing a back substrate, and (b) is a sectional view. It is. Hereinafter, a conventional method for manufacturing a plasma display panel will be described with reference to FIGS.

  As shown in FIG. 12, first, scan electrodes 303 and common electrodes 304 are formed on an insulating substrate 302 so as to extend in parallel to each other and to be alternately arranged.

  Next, trace electrodes 305 and 306 are formed on the scan electrode 303 and the common electrode 304, respectively.

  Next, a dielectric layer 312 is formed on the insulating substrate 302 so as to cover the scan electrode 303, the common electrode 304, and the trace electrodes 305 and 306.

  Next, a protective layer 313 made of MgO is formed on the dielectric layer 312.

  Thereby, the front substrate 351 is manufactured.

  On the other hand, with respect to the back substrate 352, a plurality of data electrodes 307 extending in one direction are formed on the insulating substrate 301 as shown in FIGS.

  Next, as shown in FIGS. 14A and 14B, a dielectric layer 314 is formed on the insulating substrate 301 so as to cover the data electrodes 307.

  Next, as shown in FIGS. 15A and 15B, a partition 315 is formed on the dielectric layer 314.

  As a method of forming the partition 315, there are a sand blasting method and a printing method. For example, when the sand blasting method is used, the partition 315 is formed as follows.

  First, a barrier rib paste in which a filler, glass powder, a binder and a solvent are mixed is prepared.

  Next, this barrier rib paste is applied onto the dielectric layer 314, and the solvent in the barrier rib paste is volatilized to form a barrier rib paste layer (not shown).

  Next, a dry film (not shown) is stuck on the partition wall paste layer, and the dry film is patterned.

  Next, sand blasting is performed using the patterned dry film as a mask, and the partition paste layer is selectively removed to perform patterning.

  Thereafter, the dry film is removed and the partition paste layer is fired.

  As a result, the binder in the partition paste layer evaporates, and the glass powder is melted and re-solidified to form the partition 315 made of filler and glass.

  The partition walls 315 are formed in a grid pattern so that the vertical partition walls 315a and the horizontal partition walls 315b are substantially equal to each other.

  Next, as shown in FIG. 12, a phosphor layer 311 is formed on the surface of the dielectric layer 314 and the side surfaces of the partition walls 315.

  After that, the insulating substrate 301 is overlaid on the insulating substrate 302, and the partition 315 formed on the insulating substrate 301 is brought into contact with the protective layer 313 formed on the insulating substrate 302. At this time, the direction in which the data electrode 307 extends is orthogonal to the direction in which the scan electrode 303 and the common electrode 304 extend.

  Next, heat treatment is performed in a state where the insulating substrate 301 and the insulating substrate 302 are overlapped, and the end portions of the insulating substrates 301 and 302 are fused with frit. Thereby, the space surrounded by the insulating substrate 301, the insulating substrate 302, and the sealing layer (not shown) made of the frit is hermetically sealed.

  Thereafter, the space is evacuated and the space is filled with a discharge gas.

  Thereby, the plasma display panel shown in FIG. 12 is produced.

  However, the above-described conventional plasma display panel has a problem in that a display defect occurs due to shrinkage during baking of the barrier rib paste layer. Hereinafter, this display defect will be described.

  This display defect can be classified into two types.

  The first type of display failure is a display failure caused by a part of the vertical partition wall 315a being raised by firing the partition paste layer.

  This first type of display failure is caused by the fact that the vertical barrier ribs 315a are different from the horizontal barrier ribs 315b, and the vertical barrier ribs 315a are longer and narrower than the horizontal barrier ribs 315b.

  Since the vertical barrier ribs 315a are longer and narrower than the horizontal barrier ribs 315b, the shrinkage behavior during firing differs between the vertical barrier ribs 315a and the horizontal barrier ribs 315b. It will be high.

  As a result, when the insulating substrate 301 is superposed on the insulating substrate 302, the raised portion of the vertical partition 315a is strongly pressed by the protective layer 313, and the vertical partition 315a may be broken. When the vertical barrier ribs 315a are broken, the vertical barrier ribs 315a themselves and the phosphor layer 311 formed on the side surfaces of the vertical barrier ribs 315a are scattered in the display cell 308 and come into contact with the scanning electrode 303 or the common electrode 304. As a result, the display cell 308 does not operate normally, and a display defect occurs in which the display cell 308 continues to be lit regardless of the drive signal, or conversely, it does not light at all.

  The second type of display failure is caused by the vertical partition walls 315a and the horizontal partition walls 315b constituting the partition walls 315 being shrunk and deformed with firing, and the end portions in the longitudinal direction being higher than the center portion. It is bad.

  16A to 16C are cross-sectional views showing the shrinkage behavior of the partition 315 during firing, where FIG. 16A is before firing, FIG. 16B is after firing, and FIG. 16C is the insulating substrate 301 and the insulating substrate 302. The state after being superimposed is shown. In FIGS. 16A to 16C, the components other than the insulating substrates 301 and 302 and the partition 315 are not shown in order to simplify the drawing.

  As shown in FIG. 16A, the height of the partition 315 before firing is uniform.

  However, as shown in FIG. 16B, the partition wall 315 contracts and deforms as it is fired, and the end portion 315c in the longitudinal direction becomes higher than the central portion 315d.

  As shown in FIG. 16C, when the insulating substrate 302 is overlaid on the insulating substrate 301 in this state and the inside of the discharge space is exhausted, the insulating substrates 301 and 302 are bent by the atmospheric pressure. Since it is different from the curved shape of 315, a gap 316 is formed between the partition wall 315 and the insulating substrate 302 in the vicinity of the end 315c.

  As a result, the volume of the display cell 308 (see FIG. 12) in the region where the gap 316 is formed increases, and the voltage required to generate the write discharge in the display cell 308 increases. As a result, in this display cell 308, writing discharge does not occur in normal driving, and writing failure occurs. That is, a display defect occurs in the plasma display panel.

  Conventionally, several countermeasures have been proposed for the above-mentioned second type of display failure.

  For example, Patent Document 1 discloses a technique for directly forming a partition wall on a back substrate without providing a dielectric layer on the back substrate in a non-display area for the purpose of preventing a second type of display failure. It is disclosed. Thereby, the height of the partition wall in the non-display area (peripheral part) is made lower than the height of the partition wall in the display area (center part), the partition wall is shrunk by firing, and the longitudinal end is higher than the center part. In addition, it is possible to prevent a gap from being formed between the entire substrate.

  On the other hand, the first type of display failure described above still has a low degree of recognition, and therefore no countermeasure has been proposed.

  For example, according to the technique described in Patent Document 1, the second type of display failure can be prevented, but the first type of display failure cannot be prevented.

  Further, Patent Document 2 proposes a plasma display panel in which a horizontal partition is improved for the purpose of preventing the first type of display failure.

  FIG. 17 is a schematic view showing the structure of the partition walls in the plasma display panel proposed in the publication.

  As shown in FIG. 17, this plasma display panel has a plurality of horizontal barrier ribs 315A extending in the horizontal direction and a plurality of vertical barrier ribs extending in the vertical direction only between a pair of adjacent horizontal barrier ribs 315A. 315B.

  Overhang portions 315C are formed at both ends of the horizontal partition wall 315A, and the bulge due to firing shrinkage is concentrated on the overhang portions 315C. The front substrate and the rear substrate are coupled to each other between the overhang portions 315C at both ends of the horizontal partition 315A. For this reason, the front substrate and the rear substrate can be coupled to each other while maintaining a certain gap without being affected by the raised protrusion 315C.

Further, as shown in FIG. 18, Patent Document 3 proposes a partition wall structure in which tapers 315D are provided at both ends of the partition wall to prevent the swelling due to firing shrinkage.
JP 2001-319580 A ([0038], FIG. 4) JP 2000-340123 A ([0038], FIG. 1) Japanese Patent Laid-Open No. 11-339668 ([0014]-[0015], FIGS. 1 and 2)

  However, according to the plasma display panel disclosed in Patent Document 2, the front substrate and the rear substrate can be coupled to each other while maintaining a certain gap, but the projecting portion 315C is raised. If the position where the front substrate and the rear substrate are aligned is slightly out of alignment, the front substrate overlaps with the overhanging portion 315C, and it becomes impossible to make the gap between the front substrate and the rear substrate constant.

  Therefore, it is necessary to position the front substrate and the rear substrate with high accuracy and to bond them together, and a new problem arises that the manufacturing process of the plasma display panel becomes complicated.

  Moreover, the partition structure shown by patent document 3 is formed by the process of physical cutting, die cutting, or half exposure, for example.

  In the case where the taper 315D is formed by physical cutting, a new cutting process is required, and there is a new problem that chips are generated due to cutting.

  Further, when the taper 315D is formed by die-cutting or half exposure, a new facility is required for that purpose, and a new problem arises that it cannot be applied to a conventional method for manufacturing a partition using sandblasting.

  The present invention has been made in view of the problems in the barrier rib structure of the conventional plasma display panel as described above, and prevents the barrier ribs from rising due to firing shrinkage without increasing or complicating the manufacturing process. An object of the present invention is to provide a plasma display panel capable of performing

  The invention according to claim 1 is a plasma display panel comprising a first substrate and a second substrate disposed opposite to the first substrate, wherein the first substrate is insulative. A substrate, a plurality of data electrodes formed on the insulating substrate in parallel with each other, and a plurality of vertical electrodes disposed on the insulating substrate so as to extend in parallel to the data electrodes. A plurality of horizontal barrier ribs disposed on the insulating substrate so as to extend perpendicularly to the vertical barrier ribs; a first barrier rib and at least one of the horizontal barrier ribs; and the horizontal barrier rib A third partition that is a curved partition that connects at least one of the two ends in the length direction of the second partition to each other at at least one end thereof. The vertical barrier ribs and the horizontal barrier ribs Forming a so that grid-shaped partition, the length of the vertical grid of the grid-shaped partition is characterized by longer than the lateral length.

  The invention according to claim 3 is a plasma display panel comprising a first substrate and a second substrate disposed opposite to the first substrate, wherein the first substrate is insulative. A substrate, a plurality of data electrodes formed on the insulating substrate in parallel with each other, and a plurality of vertical electrodes disposed on the insulating substrate so as to extend in parallel to the data electrodes. And a plurality of horizontal barrier ribs arranged on the insulating substrate so as to extend perpendicular to the vertical barrier ribs, and the vertical barrier ribs and the horizontal barrier ribs cross each other. Partition walls are formed, and the first substrate is further disposed so as to pass through a path outside a region where the lattice-shaped partition walls are disposed, and the first partition walls which are at least one of the horizontal partition walls and the first partition walls The second partition, which is at least one of the other horizontal partitions, is A third partition wall which is a curved partition wall portion which is coupled to each other at at least one of both end portions in the length direction, and the vertical length of the lattice of the lattice-shaped partition wall is a horizontal length It is characterized by being longer.

  According to a fourth aspect of the present invention, there is provided a plasma display panel comprising a first substrate and a second substrate disposed opposite to the first substrate, wherein the first substrate is an image An insulating substrate having a display region that is a region where display is performed and a non-display region that is located around the display region and where no image is displayed; and the display on the insulating substrate A plurality of display partitions formed so as to pass through the region or along a boundary line between the display region and the non-display region, and on the insulating substrate as a whole, the non-display A plurality of vertical barrier ribs extending in parallel to each other, and a plurality of horizontal barrier ribs extending perpendicularly to the vertical barrier ribs. The dummy partition wall is connected to the vertical partition wall. A plurality of dummy vertical bulkheads extending in parallel, and a plurality of dummy horizontal bulkheads extending perpendicularly to the vertical bulkheads and the dummy vertical bulkheads, the vertical bulkheads and the dummy vertical bulkheads, A grid-shaped partition wall is formed so that a horizontal partition wall and the dummy horizontal partition wall cross each other, and the first substrate includes at least one of the dummy vertical partition walls, the first partition wall and the vertical partition wall And further comprising a third partition wall which is a curved partition wall portion which connects at least one second partition wall to each other at least one of the end portions in the length direction, The vertical length of the grid is characterized by being longer than the horizontal length.

  The invention according to claim 8 is a plasma display panel comprising a first substrate and a second substrate disposed opposite to the first substrate, wherein the first substrate is an image An insulating substrate having a display region that is a region where display is performed and a non-display region that is located around the display region and where no image is displayed; and the display on the insulating substrate A plurality of display partitions formed so as to pass through the region or along a boundary line between the display region and the non-display region, and on the insulating substrate as a whole, the non-display A plurality of vertical barrier ribs extending in parallel to each other, and a plurality of horizontal barrier ribs extending perpendicularly to the vertical barrier ribs. The dummy partition wall is connected to the vertical partition wall. A plurality of dummy vertical bulkheads extending in parallel, and a plurality of dummy horizontal bulkheads extending perpendicularly to the vertical bulkheads and the dummy vertical bulkheads, the vertical bulkheads and the dummy vertical bulkheads, A grid-shaped partition wall is formed so that a horizontal partition wall and the dummy horizontal partition wall cross each other, and the first substrate includes at least one of the dummy horizontal partition walls, the first partition wall and the horizontal partition wall A second partition wall that is at least one, and further includes a third partition wall that is a curved partition wall portion that couples the walls to each other at at least one of the end portions in the length direction; The vertical length of the grid of the partition walls is longer than the horizontal length.

  The invention according to claim 10 is a plasma display panel comprising a first substrate and a second substrate disposed opposite to the first substrate, wherein the first substrate An insulating substrate having a display region that is a region where display is performed and a non-display region that is located around the display region and where no image is displayed; and the display on the insulating substrate A plurality of display partitions formed so as to pass through the region or along a boundary line between the display region and the non-display region, and on the insulating substrate as a whole, the non-display A plurality of vertical barrier ribs extending in parallel to each other, and a plurality of horizontal barrier ribs extending perpendicularly to the vertical barrier ribs. The dummy partition wall is the vertical partition wall A plurality of dummy vertical bulkheads extending in parallel to each other, and the vertical bulkheads and a plurality of dummy horizontal bulkheads extending perpendicular to the dummy vertical bulkheads, the vertical bulkheads and the dummy vertical bulkheads, A horizontal partition and a dummy horizontal partition form a grid-shaped partition so as to cross each other, and the first substrate is disposed so as to pass through a path outside the region where the lattice-shaped partition is disposed, and the dummy vertical partition A curve that couples at least one of the first partition that is at least one of the first partition walls and the second partition that is at least one of the vertical partition walls at at least one of the end portions in the length direction thereof. A third partition wall, which is a partition wall portion, is further provided, and the vertical length of the lattice of the lattice-shaped partition wall is longer than the horizontal length.

  The invention according to claim 11 is a plasma display panel comprising a first substrate and a second substrate disposed opposite to the first substrate, wherein the first substrate An insulating substrate having a display region that is a region where display is performed and a non-display region that is located around the display region and where no image is displayed; and the display on the insulating substrate A plurality of display partitions formed so as to pass through the region or along a boundary line between the display region and the non-display region, and on the insulating substrate as a whole, the non-display A plurality of vertical barrier ribs extending in parallel to each other, and a plurality of horizontal barrier ribs extending perpendicularly to the vertical barrier ribs. The dummy partition wall is the vertical partition wall A plurality of dummy vertical bulkheads extending in parallel to each other, and the vertical bulkheads and a plurality of dummy horizontal bulkheads extending perpendicular to the dummy vertical bulkheads, the vertical bulkheads and the dummy vertical bulkheads, A horizontal partition and the dummy horizontal partition form a grid-shaped partition so as to cross each other, and the first substrate is disposed so as to pass through a path outside the region where the lattice-shaped partition is disposed. A curve that couples at least one of the first partition that is at least one of the first partition and the second partition that is at least one of the horizontal partitions at at least one of the ends in the length direction thereof. A third partition wall, which is a partition wall portion, is further provided, and the vertical length of the lattice of the lattice-shaped partition wall is longer than the horizontal length.

(First embodiment)
FIG. 1 is a schematic plan view of a back substrate 10 according to the first embodiment of the present invention. In order to simplify the drawing, only the partition walls are shown in FIG. 1, but the back side substrate 10 according to the present embodiment has the same structure as the back substrate 352 shown in FIG. It shall be.

  In the back side substrate 10 according to the present embodiment, the partition walls include a plurality of vertical partition walls 101 extending in parallel with each other in the vertical direction of FIG. 1 and a plurality of horizontal partition walls 102 extending in parallel with each other in the horizontal direction of FIG. , Is composed of. All the intervals between adjacent vertical partitions 101 are equal, and all the intervals between adjacent horizontal partitions 102 are equal. Furthermore, the ratio (aspect ratio) of the interval between adjacent horizontal barrier ribs 102 and the interval between adjacent vertical barrier ribs 101 is 3: 1. The vertical barrier ribs 101 and the horizontal barrier ribs 102 are arranged in a lattice shape as a whole.

  In the back side substrate 10 according to the present embodiment, the adjacent vertical partition walls 101 are formed so as to be continuous with each other via semicircular partition wall portions 103 at both ends thereof.

  That is, the back-side substrate 10 according to the present embodiment has 16 vertical barrier ribs 101, and the Nth vertical barrier rib (N is a positive odd number between 1 and 15) as viewed from the left side of FIG. 101 is formed to be continuous with each other via the (N + 1) th vertical partition wall 101 and the semicircular partition wall portion 103.

  Similarly, the horizontal partition walls 102 adjacent to each other are formed so as to be continuous with each other via semicircular partition wall portions 103 at both ends thereof.

  That is, the back side substrate 10 according to the present embodiment has eight horizontal partitions 102, and is the Mth (M is a positive odd number between 1 and 7) th horizontal partition as viewed from the upper side of FIG. 102 are formed so as to be continuous with each other via the (M + 1) th horizontal partition wall 102 and the semicircular partition wall portion 103.

  FIG. 2 shows test results showing the heights measured at several locations of the vertical partition wall 101, the horizontal partition wall 102, and the semicircular partition wall portion 103 in the back side substrate 10 according to the present embodiment.

  The total film thickness of the dielectric layers and the partition walls was measured at 10 points 1 to 15 shown in FIG. The result is shown in FIG.

  The design value of the total film thickness of the dielectric layers and the partition walls is 120 μm. The position with the largest film thickness is 133 μm at the fifth place, and the position with the next largest film thickness is 132 μm at the first place. Considering that the measurement error is about ± 5 μm, the film thickness at the No. 3, No. 6, No. 12 and No. 15 points is within the range of the measurement error, and the remaining No. 1, No. 2, No. 5 The deviation from the design value (120 μm) of the film thickness at the 8th, 10th and 13th locations is 8 μm at the 5th location at the maximum.

  In the partition wall structure disclosed in Japanese Patent Application Laid-Open No. 2000-340123 or Japanese Patent Application Laid-Open No. 11-339668 shown as a conventional example, the deviation from the design value of the total thickness of the dielectric layer and the partition wall is about 20-30 μm.

  Thus, according to the back side substrate 10 according to the present embodiment, the shrinkage that occurs during firing can be obtained by joining the ends of a pair of vertical partition walls or horizontal partition walls through the semicircular partition wall portions. The force can be gently dispersed. For this reason, it is possible to prevent the vertical partition wall or the end of the horizontal partition wall from rising, and as a result, it is possible to more reliably prevent the partition wall from being broken or having a poor shape as compared with the conventional example. Therefore, it is possible to prevent display defects due to partition wall defects and shape defects.

  The partition structure in the back side substrate 10 according to the present embodiment can be formed by changing the pattern of the dry film to be applied on the partition paste layer in accordance with the partition structure.

  Therefore, the number of manufacturing steps does not increase as compared with the conventional method for manufacturing a partition wall.

  In addition, the structure of the vertical partition 101, the horizontal partition 102, and the partition part 103 in the back side board | substrate 10 based on this embodiment is not limited to the above-mentioned thing, As described below, various changes are possible. .

  First, in the back side substrate 10 according to the present embodiment, all the vertical partition walls 101 and the horizontal partition walls 102 are coupled via the semicircular partition wall portion 103. It is not necessary to connect the partition wall 102 via the partition wall portion 103.

  Taking the back substrate 10 shown in FIG. 1 as an example, for example, an L (L = 1, 5, 9, 13) th vertical partition 101 and an (L + 1) th vertical partition 101 are semicircular partitions. It is also possible to couple through the portion 103 and leave the remaining vertical partition wall 101 as it is. That is, according to the design environment, the vertical partition wall 101 to be coupled through the partition wall portion 103 can be selected.

  It is desirable that the partition located on the outermost periphery of the display portion of the plasma display panel is always coupled to another partition via a semicircular partition.

  Secondly, in the back side substrate 10 according to the present embodiment, the connection between the vertical partition walls 101 and the horizontal partition walls 102 is performed through the semicircular partition wall portion 103. The shape of the partition wall portion 103 is as follows. It is not necessarily limited to a semicircular shape.

  The partition wall portion 103 may have, for example, an arc shape that is a part of a circle, or may be configured by a combination of arbitrary curves that are convex as a whole. The partition wall portion 103 can be formed in an arbitrary curved shape as long as the two straight portions do not have corner portions that are connected to each other at an angle.

(Second embodiment)
FIG. 3 is a schematic plan view of the back-side substrate 20 according to the second embodiment of the present invention. In order to simplify the drawing, only the partition walls are shown in FIG. 3 as in FIG. 1, but the back side substrate 20 according to the present embodiment is the same as the back substrate 352 shown in FIG. It shall have the same structure.

  In the back side substrate 20 according to the present embodiment, the partition walls include a plurality of vertical partition walls 101a extending in parallel with each other in the vertical direction of FIG. 3, and a plurality of horizontal partition walls 102a extending in parallel with each other in the horizontal direction of FIG. , Is composed of. The intervals between adjacent vertical barrier ribs 101a are all equal, and the intervals between adjacent horizontal barrier ribs 102a are all equal. Furthermore, the ratio (aspect ratio) of the interval between adjacent horizontal partitions 102a and the interval between adjacent vertical partitions 101a is 3: 1. The vertical partition walls 101a and the horizontal partition walls 102a are arranged in a lattice shape as a whole.

  Here, the vertical barrier rib 101a located on the leftmost side of FIG. 3 and the three vertical barrier ribs 101a located on the right side of the vertical barrier rib 101a are respectively arranged in this order in the first vertical barrier rib 101-1 and the second vertical barrier rib 101-. 2 and called the third vertical partition 101-3 and the fourth vertical partition 101-4.

  In the back side substrate 20 according to the present embodiment, the first vertical partition wall 101-1 has the third vertical partition wall 101-3 and the first semicircular partition wall portion 103-1 at both ends thereof. Further, the second vertical partition wall 101-2 is formed via the fourth vertical partition wall 101-4 and the second semicircular partition wall portion 103-2 at both ends thereof. Are formed to be continuous with each other. The first semicircular partition wall portion 103-1 and the second semicircular partition wall portion 103-2 are at an intermediate point between the second vertical partition wall 101-2 and the third vertical partition wall 101-3. Crossed.

  Since the interval between the first vertical partition 101-1 and the third vertical partition 101-3 is equal to the interval between the second vertical partition 101-2 and the fourth vertical partition 101-4, The radius of the first semicircular partition wall portion 103-1 is equal to the radius of the second semicircular partition wall portion 103-2.

  That is, the back side substrate 20 according to the present embodiment has 16 vertical partition walls 101a, and the Nth (N is 1, 5, 9, 13) vertical partition wall 101a as viewed from the left side of FIG. The N + 2) th vertical partition wall 101a and the semicircular partition wall portion 103-1 are formed so as to be continuous with each other, and M (M is 2, 6, 10, 14) when viewed from the left side of FIG. The th vertical partition wall 101a is formed to be continuous with each other via the (M + 2) th vertical partition wall 101a and the semicircular partition wall portion 103-2.

  The same applies to the horizontal partition wall 102a.

  FIG. 4 shows the test results indicating the heights measured at several locations of the vertical partition walls 101a, the horizontal partition walls 102a, and the semicircular partition wall portions 103a in the back side substrate 20 according to the present embodiment.

  The total film thickness of the dielectric layers and the partition walls was measured at 1-20 and 15 points A shown in FIG. The result is shown in FIG.

  The design value of the total film thickness of the dielectric layers and the partition walls is 120 μm. The position with the largest film thickness is 138 μm at the 8th place, and the position with the next largest film thickness is 134 μm at the 5th place. Considering that the measurement error is about ± 5 μm, the film thicknesses at the Nos. 2, 6, 11, 12, 14, 15, 16, 19, and A are within the measurement error range. The deviation from the design value (120 μm) of the film thickness at the remaining Nos. 1, 5, 7, 8, 13, and 20 is 14 μm at the maximum.

  In the partition wall structure disclosed in Japanese Patent Application Laid-Open No. 2000-340123 or Japanese Patent Application Laid-Open No. 11-339668 shown as a conventional example, the deviation from the design value of the total thickness of the dielectric layer and the partition wall is about 20-30 μm.

  As described above, according to the back side substrate 20 according to the present embodiment, the shrinkage generated during firing can be obtained by joining the ends of a pair of vertical partition walls or horizontal partition walls to each other via the semicircular partition walls. The force can be gently dispersed. For this reason, it is possible to prevent the bulge at the end of the vertical partition wall or the horizontal partition wall. As a result, similarly to the back-side substrate 10 according to the first embodiment, defects or shape defects of the partition wall are more sure than in the conventional example. It is possible to prevent.

  In addition, also in the back side substrate 20 according to the present embodiment, the structures of the vertical partition walls 101a, the horizontal partition walls 102a, and the partition wall portions 103a can be variously changed as in the back side substrate 10 according to the first embodiment. .

(Third embodiment)
FIG. 5 is a schematic plan view of the back-side substrate 30 according to the third embodiment of the present invention. In order to simplify the drawing, only the partition walls are shown in FIG. 5 as in FIG. 1. However, for the structure other than the partition walls, the back side substrate 30 according to the present embodiment is the same as the back substrate 352 shown in FIG. It shall have the same structure.

  In the rear substrate 30 according to the present embodiment, the partition walls include 12 vertical partition walls 101a to 101l extending in parallel with each other in the vertical direction of FIG. 5 and 8 partition walls extending in parallel with each other in the horizontal direction of FIG. It is comprised from the horizontal partition 102a-102h. The intervals between adjacent vertical partition walls 101a-101l are all equal, and the intervals between adjacent horizontal partition walls 102a-102h are all equal. Furthermore, the ratio (aspect ratio) between the interval between adjacent horizontal partition walls 102a-102h and the interval between adjacent vertical partition walls 101a-101l is set to 3: 1. The vertical barrier ribs 101a-101l and the horizontal barrier ribs 102a-102h are arranged in a lattice shape as a whole.

  In the back side substrate 30 according to the present embodiment, every five vertical partition walls 101a to 101l are continuously formed at both end portions thereof via semicircular partition wall portions.

  In other words, the vertical partition walls 101a are formed continuously from each other via the vertical partition walls 101g and the semicircular partition wall portions 103a. Hereinafter, similarly, the vertical partition wall 101b is continuously formed through the vertical partition wall 101h and the semicircular partition wall portion 103b, and the vertical partition wall 101c is mutually connected through the vertical partition wall 101i and the semicircular partition wall portion 103c. The vertical barrier ribs 101d are formed continuously with each other through the vertical barrier ribs 101j and the semicircular partition wall portions 103d, and the vertical barrier ribs 101e are connected with the vertical barrier ribs 101k and the semicircular barrier rib portions 103e. The vertical partition walls 101f are formed continuously with each other through the vertical partition walls 101l and the semicircular partition wall portions 103f.

  Further, every three horizontal barrier ribs 102a to 102h are continuously formed at both end portions thereof via a semicircular partition wall portion.

  That is, the horizontal barrier ribs 102a are formed continuously from each other via the horizontal barrier ribs 102e and the semicircular barrier rib portions 103g. Hereinafter, similarly, the horizontal partition wall 102b is formed continuously with the horizontal partition wall 102f and the semicircular partition wall portion 103h, and the horizontal partition wall 102c is mutually connected with the horizontal partition wall 102g and the semicircular partition wall portion 103i. The horizontal barrier ribs 102d are continuously formed through the horizontal barrier ribs 102h and the semicircular barrier rib portions 103j.

  That is, both the vertical barrier ribs and the horizontal barrier ribs are combined with other vertical barrier ribs and horizontal barrier ribs and semicircular barrier rib portions every S / 2 (S is the total number of vertical barrier ribs and horizontal barrier ribs).

  Also by the back side substrate 30 according to the present embodiment, the contraction force generated during firing is gently dispersed by bonding the ends of a pair of vertical partition walls or horizontal partition walls to each other through a semicircular partition wall portion. Can be made. For this reason, it is possible to prevent the vertical partition wall or the bulge at the end of the horizontal partition wall, and as a result, the partition wall, similarly to the back side substrate 10 according to the first embodiment and the back side substrate 20 according to the second embodiment. It is possible to prevent the defect or the shape defect more reliably than the conventional example.

(Fourth embodiment)
FIG. 6 is a schematic plan view of the back-side substrate 40 according to the fourth embodiment of the present invention. In order to simplify the drawing, only the partition walls are shown in FIG. 6 as in FIG. 1, but the back side substrate 40 according to the present embodiment is the same as the back substrate 352 shown in FIG. It shall have the same structure.

  In the back side substrate 40 according to the present embodiment, the partition walls include eight vertical partition walls 101a to 101h extending in parallel with each other in the vertical direction in FIG. 6 and eight partition walls extending in parallel with each other in the horizontal direction in FIG. It is comprised from the horizontal partition 102a-102h. The intervals between adjacent vertical partition walls 101a-101h are all equal, and the intervals between adjacent horizontal partition walls 102a-102h are all equal. Furthermore, the ratio (aspect ratio) between the interval between adjacent horizontal partition walls 102a-102h and the interval between adjacent vertical partition walls 101a-101h is set to 3: 1. The vertical partition walls 101a to 101h and the horizontal partition walls 102a to 102h are arranged in a lattice shape as a whole.

  In the back side substrate 40 according to the present embodiment, a set of partition walls are continuous with each other through semicircular partition wall portions at both ends thereof, and two sets of partition walls are provided inside the set of partition walls. Other partition walls are arranged, and these two sets of other partition walls are respectively formed continuously from each other through semicircular partition wall portions at both ends thereof.

  Specifically, the vertical partition wall 101a and the vertical partition wall 101f are formed continuously from each other via a semicircular partition wall portion 103a at both ends thereof, and surrounded by the vertical partition wall 101a and the vertical partition wall 101f. The vertical barrier ribs 101b and the vertical barrier ribs 101c are continuously formed at both ends via semicircular barrier rib portions 103b and are surrounded by the vertical barrier ribs 101a and the vertical barrier ribs 101f. The vertical partition wall 101d and the vertical partition wall 101e are continuously formed at both end portions thereof via a semicircular partition wall portion 103c.

  In this case, the radius of the semicircular partition wall portion 103a is larger than the radius of the semicircular partition wall portion 103b and the semicircular partition wall portion 103c. Note that the radius of the semicircular partition wall portion 103b is equal to the radius of the semicircular partition wall portion 103c.

  Similarly, the horizontal barrier ribs 102a and the horizontal barrier ribs 102f are continuously formed at both ends via semicircular barrier rib portions 103e, and are surrounded by the horizontal barrier ribs 102a and the horizontal barrier ribs 102f. The horizontal barrier ribs 102b and the horizontal barrier ribs 102c are formed continuously from each other through semicircular barrier rib portions 103f at both ends thereof, and are also surrounded by the horizontal barrier ribs 102a and the horizontal barrier ribs 102f. The partition wall 102d and the horizontal partition wall 102e are continuously formed at both end portions thereof via a semicircular partition wall portion 103g.

  In this case, the radius of the semicircular partition wall portion 103e is larger than the radius of the semicircular partition wall portion 103g and the semicircular partition wall portion 103g. The radius of the semicircular partition wall portion 103g is equal to the radius of the semicircular partition wall portion 103g.

  Note that the vertical partition wall 101g and the vertical partition wall 101h are continuously formed at both ends thereof via a semicircular partition wall portion 103d, and the horizontal partition wall 102g and the horizontal partition wall 102h are formed at both ends thereof. The semicircular partition walls 103h are formed continuously with each other. The vertical partition walls 101g and the vertical partition walls 101h are located outside the semicircular partition wall portion 103a, and the horizontal partition walls 102g and the horizontal partition wall 102h are positioned outside the semicircular partition wall portion 103e.

  In the back side substrate 40 according to the present embodiment, two sets of vertical barrier ribs (a set of the vertical barrier rib 101b and the vertical barrier rib 101c and a set of the vertical barrier rib 101c and the vertical barrier rib 101c) The vertical partition wall 101d and the vertical partition wall 101e) are arranged, but the set of the vertical partition walls arranged inside the semicircular partition wall portion that connects one vertical partition wall to the other vertical partition wall. The number is not limited to 2, and any integer other than 2 can be selected.

  This also applies to the horizontal partition.

  Also by the back side substrate 40 according to the present embodiment, the contraction force generated during firing is gently dispersed by joining the ends of a pair of vertical partition walls or horizontal partition walls to each other via a semicircular partition wall portion. Can be made. For this reason, it is possible to prevent the vertical barrier ribs or the bulges at the end portions of the horizontal barrier ribs. As a result, the barrier ribs are the same as those of the rear substrate 10 according to the first embodiment and the rear substrate 20 according to the second embodiment. It is possible to prevent the defect or the shape defect more reliably than the conventional example.

(Fifth embodiment)
FIG. 7 is a schematic plan view of the back-side substrate 50 according to the fifth embodiment of the present invention. In order to simplify the drawing, only the partition walls are shown in FIG. 7, but the back side substrate 50 according to the present embodiment has the same structure as the back substrate 352 shown in FIG. It shall be.

  In the rear substrate 50 according to the present embodiment, the partition walls include a plurality of vertical partition walls 101 extending in parallel with each other in the vertical direction of FIG. 7 and a plurality of horizontal partition walls 102 extending in parallel with each other in the horizontal direction of FIG. , Is composed of. All the intervals between adjacent vertical partitions 101 are equal, and all the intervals between adjacent horizontal partitions 102 are equal. Furthermore, the ratio (aspect ratio) of the interval between adjacent horizontal barrier ribs 102 and the interval between adjacent vertical barrier ribs 101 is 3: 1. The vertical barrier ribs 101 and the horizontal barrier ribs 102 are arranged in a lattice shape as a whole.

  Here, the vertical barrier rib 101 located on the leftmost side of FIG. 7 and the three vertical barrier ribs 101 located on the right side of the vertical barrier rib 101 are arranged in this order in the order of the first vertical barrier rib 101-1 and the second vertical barrier rib 101-. 2 and called the third vertical partition 101-3 and the fourth vertical partition 101-4.

  In the back side substrate 50 according to the present embodiment, the first vertical partition 101-1 and the fourth vertical partition 101-4 are formed continuously with each other through a semicircular partition 103a. In addition, the second vertical partition wall 101-2 and the third vertical partition wall 101-3 are formed continuously from each other via a semicircular partition wall portion 103b.

  The radius of the semicircular partition wall portion 103a is three times the radius of the semicircular partition wall portion 103b.

  Thus, in the back side substrate 50 according to the present embodiment, a pair of vertical partition walls 101-1 and 101-4 are continuously formed at both end portions thereof via the semicircular shape 103 a partition wall portion. In this set of vertical partition walls 101-1, 101-4, the other set of vertical partition walls 101-2, 101-3 is located at both ends thereof via semicircular partition wall portions 103b. Are formed continuously.

  Hereinafter, the same partition structure is formed for each of the four vertical partitions 101.

  In addition, the horizontal barrier rib 102 has the same barrier rib structure as that of the vertical barrier rib 101.

  The horizontal barrier rib 102 located on the uppermost side of FIG. 7 and the three horizontal barrier ribs 102 located on the lower side of the horizontal barrier rib 102 are respectively arranged in this order, the first horizontal barrier rib 102-1, the second horizontal barrier rib 102-2, They are called the third horizontal partition wall 102-3 and the fourth horizontal partition wall 102-4.

  In the back side substrate 50 according to the present embodiment, the first horizontal partition wall 102-1 and the fourth horizontal partition wall 102-4 are formed continuously from each other via a semicircular partition wall portion 103c. Furthermore, the second horizontal partition wall 102-2 and the third horizontal partition wall 102-3 are continuously formed through a semicircular partition wall portion 103d.

  The radius of the semicircular partition wall portion 103c is three times the radius of the semicircular partition wall portion 103d.

  Thus, in the back side substrate 50 according to the present embodiment, a pair of horizontal partition walls 10121 and 102-4 are continuously formed at both ends via the semicircular 103c partition walls. In this set of horizontal partition walls 102-1, 102-4, another set of horizontal partition walls 102-2, 102-3 are mutually connected via semicircular partition wall portions 103d at both ends thereof. It is formed continuously.

  Hereinafter, the same partition structure is formed for each of the four horizontal partitions 102.

  FIG. 8 shows the test results indicating the heights measured at several positions of the vertical partition wall 101, the horizontal partition wall 102, and the semicircular partition wall portion 103 in the back side substrate 50 according to the present embodiment.

  The total film thickness of the dielectric layers and the partition walls was measured at 16 locations 1-20, A, and B shown in FIG. The result is shown in FIG.

  The design value of the total film thickness of the dielectric layers and the partition walls is 120 μm. The position with the largest film thickness is 136 μm at the 13th place, and the position with the next largest film thickness is 131 μm at the 1st place. Considering that the measurement error is about ± 5 μm, the film thicknesses at the locations of No. 2, No. 3, No. 5, No. 9, No. 14, No. 20, and B are values within the range of the measurement error. The deviation from the design value (120 μm) of the film thickness in the first, fourth, eighth, twelfth, thirteenth, fifteenth, sixteenth, seventeenth and A portions is 11 μm at the maximum in the thirteenth portion. .

  In the partition wall structure disclosed in Japanese Patent Application Laid-Open No. 2000-340123 or Japanese Patent Application Laid-Open No. 11-339668 shown as a conventional example, the deviation from the design value of the total thickness of the dielectric layer and the partition wall is about 20-30 μm.

  As described above, according to the back-side substrate 50 according to the present embodiment, the shrinkage that occurs during firing can be obtained by joining the ends of a pair of vertical partition walls or horizontal partition walls to each other through the semicircular partition walls. The force can be gently dispersed. For this reason, it is possible to prevent the vertical partition wall or the end of the horizontal partition wall from rising, and as a result, it is possible to more reliably prevent the partition wall from being broken or having a poor shape as compared with the conventional example.

  In addition, in the back side substrate 50 according to the present embodiment, the structures of the vertical partition walls 101, the horizontal partition walls 102, and the partition wall portions 103 can be variously changed in the same manner as the back side substrate 10 according to the first embodiment. .

  In the back side substrate 50 according to the present embodiment, as shown in FIG. 8A, the width W1 of the semicircular partition wall portion 103a is set larger than the width W2 of the semicircular partition wall portion 103b. Similarly, the width W3 of the semicircular partition wall portion 103c is set larger than the width W4 of the semicircular partition wall portion 103d.

  The partition wall portion located on the outer side is easily subjected to side etching during sandblasting. Therefore, the width W1 of the semicircular partition wall portion 103a is larger than the width W2 of the semicircular partition wall portion 103b, and the width W3 of the semicircular partition wall portion 103c is the width of the semicircular partition wall portion 103d. It is set larger than W4.

  Further, since the semicircular partition wall portions 103a and 103c located on the outer side can obtain a larger curvature than the semicircular partition wall portions 103b and 103d located on the inner side, the semicircular partition wall portions 103a and 103c Dispersion of contraction force in the connected vertical partition walls or horizontal partition walls is further increased, and as a result, swelling at both ends of the partition walls can be prevented.

  In the back side substrate 50 according to the present embodiment, the semicircular partition wall portion 103b is interposed inside the set of vertical partition walls 101-1 and 101-4 connected via the semicircular partition wall portion 103a. It is assumed that another set of vertical partition walls 101-2 and 101-3 connected to each other is disposed inside the set of vertical partition walls connected via a semicircular partition wall portion. A structure in which another set of vertical barrier ribs connected via circular barrier rib portions is arranged in a similar shape can be used.

  As an example, an example in which three sets of vertical partition walls are arranged in a similar shape and concentrically is shown below as a sixth embodiment.

(Sixth embodiment)
FIG. 9 is a schematic plan view of a back substrate 60 according to the sixth embodiment of the present invention. In order to simplify the drawing, only the partition walls are shown in FIG. 9, but the back side substrate 60 according to the present embodiment has the same structure as the back substrate 352 shown in FIG. It shall be.

  In the back side substrate 60 according to the present embodiment, the partition walls include a plurality of vertical partition walls 101 extending in parallel with each other in the vertical direction of FIG. 9, and a plurality of horizontal partition walls 102 extending in parallel with each other in the horizontal direction of FIG. , Is composed of. All the intervals between adjacent vertical partitions 101 are equal, and all the intervals between adjacent horizontal partitions 102 are equal. Furthermore, the ratio (aspect ratio) of the interval between adjacent horizontal barrier ribs 102 and the interval between adjacent vertical barrier ribs 101 is 3: 1. The vertical barrier ribs 101 and the horizontal barrier ribs 102 are arranged in a lattice shape as a whole.

  Here, the vertical partition 101 located on the leftmost side of FIG. 9 and the five vertical partitions 101 located on the right side of the vertical partition 101 are arranged in this order in the order of the first vertical partition 101-1 and the second vertical partition 101. -2, the third vertical partition 101-3, the fourth vertical partition 101-4, the fifth vertical partition 101-5, and the sixth vertical partition 101-6.

  In the back side substrate 60 according to the present embodiment, the first vertical partition 101-1 and the sixth vertical partition 101-6 are continuously formed with a semicircular partition part 103a therebetween. The second vertical partition wall 101-2 and the fifth vertical partition wall 101-5 are formed continuously with each other through the semicircular partition wall portion 103b, and further the third vertical partition wall 101-3. And the fourth vertical partition wall 101-4 are formed continuously with each other through a semicircular partition wall portion 103c.

  The radius of the semicircular partition wall portion 103a is five times the radius of the semicircular partition wall portion 103c, and the radius of the semicircular partition wall portion 103b is three times the radius of the semicircular partition wall portion 103c.

  Thus, in the back side substrate 60 according to the present embodiment, a pair of vertical partition walls 101-1 and 101-6 are continuously formed at both ends thereof via the semicircular shape 103 a partition wall portion. In this set of vertical partition walls 101-1, 101-6, the other set of vertical partition walls 101-2, 101-5 passes through the semicircular partition wall portions 103b at both ends thereof. Furthermore, inside this set of vertical partition walls 101-2 and 101-5, another set of vertical partition walls 101-3 and 101-4 is semicircular at both ends thereof. They are formed continuously with each other through the partition wall portion 103c having a shape.

  Hereinafter, the same barrier rib structure is formed for each of the six vertical barrier ribs 101.

  In addition, the horizontal barrier rib 102 has the same barrier rib structure as that of the vertical barrier rib 101.

  FIG. 10 shows the test results indicating the heights measured at several locations of the vertical partition wall 101, the horizontal partition wall 102, and the semicircular partition wall portion 103 in the back side substrate 60 according to the present embodiment.

  The total film thickness of the dielectric layer and the partition wall was measured at 20 points 1-18 and AT shown in FIG. The result is shown in FIG.

  The design value of the total film thickness of the dielectric layers and the partition walls is 120 μm. The position with the largest film thickness is 133 μm at the first, third, sixth and tenth positions, and the position with the next largest film thickness is 131 μm at the A position. Considering that the measurement error is about ± 5 μm, the film thicknesses at the locations of No. 2, No. 4, No. 12, No. 17, No. 18, P and S are values within the range of the measurement error, and the remaining 1 No. 3, No. 5, No. 6, No. 10, No. A, D, F, H, I, M, N, T, the deviation from the design value (120 μm) at the maximum is No. 1, 3 at the maximum No. 6, No. 6 and No. 10 at 13 μm.

  In the partition wall structure disclosed in Japanese Patent Application Laid-Open No. 2000-340123 or Japanese Patent Application Laid-Open No. 11-339668 shown as a conventional example, the deviation from the design value of the total thickness of the dielectric layer and the partition wall is about 20-30 μm.

  As described above, according to the back-side substrate 60 according to the present embodiment, the shrinkage generated at the time of firing is obtained by joining the ends of a set of vertical partition walls or horizontal partition walls to each other via the semicircular partition walls. The force can be gently dispersed. For this reason, it is possible to prevent the vertical partition wall or the end of the horizontal partition wall from rising, and as a result, it is possible to more reliably prevent the partition wall from being broken or having a poor shape as compared with the conventional example.

  In the back side substrate 60 according to the present embodiment, as shown in FIG. 10A, the width W1 of the semicircular partition wall portion 103a is set larger than the width W2 of the semicircular partition wall portion 103b. Further, the width W2 of the semicircular partition wall portion 103b is set larger than the width W3 of the semicircular partition wall portion 103c.

  The same applies to the width of the semicircular partition wall portion connecting a pair of horizontal partition walls.

  By defining the width of each semicircular partition wall in this way, the same effect as that described in the fifth embodiment can be obtained.

  In the above-described first to sixth embodiments, the partition wall is composed of a vertical partition wall and a horizontal partition wall. However, the partition wall can be composed of a vertical partition wall or a horizontal partition wall.

  Alternatively, as shown in FIG. 17, the partition wall can be constituted by a plurality of horizontal partition walls and a plurality of vertical partition walls formed only between adjacent horizontal partition walls.

(Seventh embodiment)
FIG. 11 is a schematic plan view of the back-side substrate 70 according to the seventh embodiment of the present invention.

  The back side substrate 70 according to the present embodiment has the same partition structure as that of the back side substrate 10 according to the first embodiment shown in FIG. The back substrate is a display area 71 (hatched area) where an image is displayed and a non-display area 72 which is located around the display area 71 and where an image is not displayed. And have.

  The vertical barrier ribs 101 and the horizontal barrier ribs 102 are formed over the entire interior of the display area 71 and are also formed on the boundary line between the display area 71 and the non-display area 72. In the non-display area 72, two columns of vertical barrier ribs 101 and horizontal barrier ribs 102 are formed so as to surround the display area 71, respectively. These two rows of vertical barrier ribs 101 and horizontal barrier ribs 102 constitute dummy barrier ribs. By forming the dummy barrier ribs, the vertical barrier ribs 101 and the horizontal barrier ribs 102 in the display region 71 are uniformly formed during the manufacture of the plasma display panel, and the display region 71 is protected after the plasma display panel is manufactured. In addition, impurities can be prevented from entering the display region 71.

  In the back-side substrate 70 according to the present embodiment, in the non-display area 72, facing both ends of the pair of vertical barrier ribs 101 and horizontal barrier ribs 102 connected to each other via the semicircular barrier rib portions 103. A frit stopper 73 is formed on the insulating substrate 301.

  The frit stopper 73 has a circular shape, and the center thereof is located on an extension line passing through the center in the width direction of a pair of adjacent vertical partition walls 101.

  Further, the frit stoppers 73 facing the adjacent pair of vertical partition walls 101 have the same diameter, and the frit stoppers 73 facing the adjacent pair of horizontal partition walls 102 have the same diameter. have.

  When the diameter of each frit stopper 73 is D, each frit stopper 73 overlaps with the adjacent frit stoppers 73 on both sides by D / 3. Thus, the frit stoppers 73 that overlap each other are displayed in the display area 71. Are arranged so as to be enclosed in a rectangular shape.

  As a conventional frit stopper, a frame-shaped object surrounding the display area 71 is formed in the non-display area 72. However, as in the present embodiment, the frit stopper 73 is formed into a circular shape, so that the frit stopper 73 is formed. The space occupied can be reduced, and further, by being disposed opposite to the pair of vertical partition walls 101 or the horizontal partition walls 102, the front side substrate 351 and the front side substrate 351 are arranged corresponding to the vertical partition walls 101 or the horizontal partition walls 102. The back side substrate 352 can be securely bonded.

  Note that the shape of the frit stopper 73 is not limited to a circular shape, and any shape can be used as long as it has a curved shape. For example, the frit stopper 73 can be elliptical.

It is a schematic top view of the back side board concerning a first embodiment of the present invention. FIG. 2A is a plan view showing points where the total film thickness of the dielectric layer and the partition wall is measured on the back side substrate according to the first embodiment, and FIG. 2B shows the measurement result. It is a table. It is a schematic top view of the back side board | substrate which concerns on 2nd embodiment of this invention. FIG. 4A is a plan view showing points where the total film thickness of the dielectric layer and the partition wall is measured in the back side substrate according to the second embodiment, and FIG. 4B shows the measurement result. It is a table. It is a schematic top view of the back side board | substrate which concerns on 3rd embodiment of this invention. It is a schematic plan view of the back side board | substrate which concerns on 4th embodiment of this invention. It is a schematic top view of the back side board | substrate which concerns on 5th embodiment of this invention. FIG. 8A is a plan view showing a point where the total film thickness of the dielectric layer and the partition wall is measured in the back side substrate according to the fifth embodiment, and FIG. 8B shows the measurement result. It is a table. It is a schematic plan view of the back side board | substrate which concerns on the 6th embodiment of this invention. FIG. 10A is a plan view showing points where the total film thickness of the dielectric layers and the barrier ribs is measured on the back side substrate according to the sixth embodiment, and FIG. 10B shows the measurement results. It is a table. It is a schematic plan view of the back side substrate concerning a 7th embodiment of the present invention. It is a perspective view which shows the structure of one display cell in the conventional 3 electrode surface discharge alternating current type plasma display panel. FIGS. 13A and 13B are diagrams illustrating one process of the manufacturing method of the conventional plasma display panel illustrated in FIG. 12, FIG. 13A is a plan view illustrating a back substrate, and FIG. 13B is J in FIG. It is sectional drawing in the -J line. FIGS. 14A and 14B are diagrams showing a step of the manufacturing method of the conventional plasma display panel shown in FIG. 12, FIG. 14A is a plan view showing a back substrate, and FIG. 14B is K in FIG. It is sectional drawing in the -K line. FIGS. 15A and 15B are diagrams showing one process of the manufacturing method of the conventional plasma display panel shown in FIG. 12, FIG. 15A is a plan view showing a back substrate, and FIG. It is sectional drawing in the -L line. It is sectional drawing which shows the shrinkage | contraction behavior at the time of baking of a partition, (a) is before baking, (b) is after baking, (c) shows the state after superimposing two insulating substrates. It is a top view which shows the partition structure in the conventional plasma display panel. It is sectional drawing which shows the partition structure in the conventional plasma display panel.

Explanation of symbols

10. Back side substrate 20 according to the first embodiment Back side substrate 30 according to the second embodiment Back side substrate 40 according to the third embodiment Back side substrate 50 according to the fourth embodiment Fifth embodiment Rear side substrate 60 according to the sixth embodiment Rear side substrate 70 according to the sixth embodiment Rear side substrate 71 according to the seventh embodiment Display area 72 Non-display area 73 Frit stoppers 101 and 101a Vertical partition walls 102 and 102a Horizontal partition walls 103 and 103a 103b, 103c, 103d Semicircular partition

Claims (13)

A plasma display panel comprising a first substrate and a second substrate disposed opposite to the first substrate,
The first substrate is
An insulating substrate;
A plurality of data electrodes formed in parallel with each other on the insulating substrate;
A plurality of vertical barrier ribs disposed on the insulating substrate so as to extend in parallel to the data electrodes;
A plurality of horizontal barrier ribs disposed on the insulating substrate so as to extend perpendicular to the vertical barrier ribs;
A first partition that is at least one of the horizontal partitions and a second partition that is at least one of the horizontal partitions A third partition wall that is a curved partition wall portion that couples each other at at least one of the end portions in the length direction;
Have
The vertical barrier ribs and the horizontal barrier ribs form grid-like barrier ribs so as to cross each other,
The plasma display panel according to claim 1, wherein a vertical length of the lattice of the lattice-shaped partition wall is longer than a horizontal length. The plasma display panel according to claim 1, wherein the first barrier rib and the second barrier rib are adjacent to each other. A plasma display panel comprising a first substrate and a second substrate disposed opposite to the first substrate,
The first substrate is
An insulating substrate;
A plurality of data electrodes formed in parallel with each other on the insulating substrate;
A plurality of vertical barrier ribs disposed on the insulating substrate so as to extend in parallel to the data electrodes;
A plurality of horizontal barrier ribs disposed on the insulating substrate so as to extend perpendicular to the vertical barrier ribs;
Have
The vertical barrier ribs and the horizontal barrier ribs form grid-like barrier ribs so as to cross each other,
The first substrate further includes:
A first partition that is at least one of the horizontal partition walls and a second that is at least one of the horizontal partition walls are disposed so as to pass through a path outside the region where the lattice-shaped partition walls are disposed. A third partition wall that is a curved partition wall portion that connects the partition walls to each other at at least one of the end portions in the length direction thereof,
The plasma display panel according to claim 1, wherein a vertical length of the lattice of the lattice-shaped partition wall is longer than a horizontal length. A plasma display panel comprising a first substrate and a second substrate disposed opposite to the first substrate,
The first substrate is
An insulating substrate having a display area where an image is displayed, and a non-display area which is located around the display area and where no image is displayed;
A plurality of display partitions formed on the insulating substrate so as to pass through the display region, or along a boundary line between the display region and the non-display region,
On the insulating substrate, a dummy partition wall formed entirely in the non-display area,
Comprising
The plurality of display partition walls include a plurality of vertical partition walls extending in parallel to each other, and a plurality of horizontal partition walls extending perpendicular to the vertical partition walls,
The dummy partition wall comprises a plurality of dummy vertical partition walls extending in parallel to the vertical partition wall, and a plurality of dummy horizontal partition walls extending perpendicular to the vertical partition wall and the dummy vertical partition wall,
Forming a grid-like partition wall so that the vertical partition wall and the dummy vertical partition wall, the horizontal partition wall and the dummy horizontal partition wall cross each other;
The first substrate is a first partition that is at least one of the dummy vertical partitions and a second partition that is at least one of the vertical partitions. Further comprising a third partition wall that is a curved partition wall portion that is coupled to each other at at least one of the end portions in the length direction,
The plasma display panel according to claim 1, wherein a vertical length of the lattice of the lattice-shaped partition wall is longer than a horizontal length. The first substrate includes a fourth partition that is at least one of the dummy horizontal partitions and a fifth partition that is at least one of the horizontal partitions. 5. The plasma display panel according to claim 4 , further comprising a sixth partition wall that is a curved partition wall portion that is coupled to each other at at least one of both end portions in the length direction thereof. . The plasma display panel of claim 4 or 5, characterized in that adjacent to each other and the second partition wall and the first partition wall. The plasma display panel according to claim 5 , wherein the fourth barrier rib and the fifth barrier rib are adjacent to each other. A plasma display panel comprising a first substrate and a second substrate disposed opposite to the first substrate,
The first substrate is
An insulating substrate having a display area where an image is displayed, and a non-display area which is located around the display area and where no image is displayed;
A plurality of display partitions formed on the insulating substrate so as to pass through the display region, or along a boundary line between the display region and the non-display region,
On the insulating substrate, a dummy partition wall formed entirely in the non-display area,
Comprising
The plurality of display partition walls include a plurality of vertical partition walls extending in parallel to each other, and a plurality of horizontal partition walls extending perpendicular to the vertical partition walls,
The dummy partition wall comprises a plurality of dummy vertical partition walls extending in parallel to the vertical partition wall, and a plurality of dummy horizontal partition walls extending orthogonally to the vertical partition wall and the dummy vertical partition wall,
Forming a grid-like partition wall so that the vertical partition wall and the dummy vertical partition wall, the horizontal partition wall and the dummy horizontal partition wall cross each other;
The first substrate is a first partition that is at least one of the dummy horizontal partitions and a second partition that is at least one of the horizontal partitions. Further comprising a third partition wall that is a curved partition wall portion that is coupled to each other at at least one of the end portions in the length direction,
The plasma display panel according to claim 1, wherein a vertical length of the lattice of the lattice-shaped partition wall is longer than a horizontal length. The plasma display panel according to claim 8 , wherein the first barrier rib and the second barrier rib are adjacent to each other. A plasma display panel comprising a first substrate and a second substrate disposed opposite to the first substrate,
The first substrate is
An insulating substrate having a display area where an image is displayed, and a non-display area which is located around the display area and where no image is displayed;
A plurality of display partitions formed on the insulating substrate so as to pass through the display region, or along a boundary line between the display region and the non-display region,
On the insulating substrate, a dummy partition wall formed entirely in the non-display area,
Comprising
The plurality of display partition walls include a plurality of vertical partition walls extending in parallel to each other, and a plurality of horizontal partition walls extending perpendicular to the vertical partition walls,
The dummy partition wall comprises a plurality of dummy vertical partition walls extending in parallel to the vertical partition wall, and a plurality of dummy horizontal partition walls extending perpendicular to the vertical partition wall and the dummy vertical partition wall,
The vertical barrier ribs and the dummy vertical barrier ribs, the horizontal barrier ribs and the dummy horizontal barrier ribs form a grid-like barrier rib so as to cross each other,
The first substrate is disposed so as to pass through a path outside a region where the lattice-shaped partition walls are disposed, and is at least one of the first partition walls and at least one of the vertical partition walls. A third partition wall that is a curved partition wall part that connects one second partition wall to each other at least one of the end portions in the length direction;
The plasma display panel according to claim 1, wherein a vertical length of the lattice of the lattice-shaped partition wall is longer than a horizontal length. A plasma display panel comprising a first substrate and a second substrate disposed opposite to the first substrate,
The first substrate is
An insulating substrate having a display area where an image is displayed, and a non-display area which is located around the display area and where no image is displayed;
A plurality of display partitions formed on the insulating substrate so as to pass through the display region, or along a boundary line between the display region and the non-display region,
On the insulating substrate, a dummy partition wall formed entirely in the non-display area,
Comprising
The plurality of display partition walls include a plurality of vertical partition walls extending in parallel to each other, and a plurality of horizontal partition walls extending perpendicular to the vertical partition walls,
The dummy partition wall comprises a plurality of dummy vertical partition walls extending in parallel to the vertical partition wall, and a plurality of dummy horizontal partition walls extending perpendicular to the vertical partition wall and the dummy vertical partition wall,
The vertical barrier ribs and the dummy vertical barrier ribs, the horizontal barrier ribs and the dummy horizontal barrier ribs form a grid-like barrier rib so as to cross each other,
The first substrate is disposed so as to pass through a path outside a region where the lattice-shaped partition walls are disposed, and is at least one of the first partition walls and at least one of the dummy partition walls. A third partition wall that is a curved partition wall part that connects one second partition wall to each other at least one of the end portions in the length direction;
The plasma display panel according to claim 1, wherein a vertical length of the lattice of the lattice-shaped partition wall is longer than a horizontal length. The non-display region is a plasma display panel according to any one of claims 4 to 11, characterized in that it is formed so as to surround the display area. The plasma display panel according to any one of claims 1 to 12, wherein the curved partition wall portion is characterized by being semicircular.

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