JP4476578B2 - Method for manufacturing liquid crystal display device - Google Patents

Description

  The present invention relates to a semiconductor device having a circuit formed of a thin film transistor (hereinafter referred to as TFT) and a manufacturing method thereof. For example, the present invention relates to an electronic apparatus in which an electro-optical device typified by a liquid crystal display panel is mounted as a component. In particular, the present invention relates to a liquid crystal display device using a ferroelectric liquid crystal.

  Note that in this specification, a semiconductor device refers to all devices that can function by utilizing semiconductor characteristics, and an electro-optical device, a semiconductor circuit, and an electronic device are all semiconductor devices.

  A conventional liquid crystal panel has a structure in which liquid crystal is sandwiched between two substrates arranged in parallel to each other. Of the two substrates, the substrate surface in contact with the liquid crystal is often subjected to some alignment treatment so that the liquid crystal molecules have a certain alignment.

  As the above alignment treatment, a thin film called an alignment film is previously formed on the substrate, and then the alignment film is rubbed in one direction with a cloth, or the alignment film is irradiated with polarized ultraviolet light, A photo-alignment method for imparting anisotropy to an alignment film is known (for example, see Patent Document 1).

Japanese Patent Laid-Open No. 11-237635

  Among the many liquid crystal materials, thermotropic liquid crystal materials are nematic liquid crystals that have the property that molecules are oriented in a certain direction by alignment treatment, and liquid crystals of a type in which molecular groups are oriented in the same direction and arranged in layers. In addition to the characteristics of smectic liquid crystals and nematic liquid crystals, there are cholesteric liquid crystals that are liquid crystals having a twisted structure.

  In smectic liquid crystal typified by antiferroelectric liquid crystal and ferroelectric liquid crystal, it has been difficult to achieve uniform alignment only by the alignment treatment.

  The reason why it is difficult to achieve uniform alignment by the conventional alignment process when the ferroelectric liquid crystal is used will be described below.

  As shown in FIG. 7, in the ferroelectric liquid crystal existing between a pair of substrates subjected to the conventional alignment treatment, the alignment direction 101 of the liquid crystal coincides with the direction 102 of the general alignment treatment immediately after the injection. Strictly speaking, two different orientation directions 101A and orientation directions 101B are mixed in the substrate plane. This is because the ferroelectric liquid crystal molecules themselves are aligned in a direction close to the direction 102 in which the alignment treatment is performed, while the direction 103 of the spontaneous polarization of the ferroelectric liquid crystal is the first substrate side 103A and the second substrate side. Since there are two types of 103B, the orientation state is different between them. When this mixed orientation state is observed with a polarization microscope, a mosaic-like orientation pattern called a domain 104 can be seen, or a zigzag border can be seen. Therefore, a good display cannot be obtained.

  The presence of the domain 104 and the boundary line is recognized as a liquid crystal alignment defect such as light leakage and image unevenness, and has a great adverse effect on the display image quality. In order to function as a liquid crystal display device capable of obtaining good display, it is necessary to at least unify the orientation direction of liquid crystal molecules to eliminate the domain 104.

  One way to achieve this is as follows. That is, with respect to the ferroelectric liquid crystal sandwiched between a pair of substrates, first, a uniform heat is applied to the substrate in a plane to cause the liquid crystal to undergo a phase transition, so that an isotropic phase (I phase) or a chiral nematic phase ( N * phase). Thereafter, the temperature is gradually lowered while applying a DC electric field between the pair of substrates in a direction perpendicular to the substrate. When the temperature eventually falls below the phase transition point, the ferroelectric liquid crystal returns from the isotropic phase (I phase) or the chiral nematic phase (N * phase) to the chiral smectic C phase (SmC * phase). At this time, if an electric field is applied to the liquid crystal, the direction of spontaneous polarization of the ferroelectric liquid crystal is aligned in one direction according to the direction of the electric field. Either one of the orientations becomes stable, and as a result, the orientation direction of the liquid crystal molecules is unified. After the temperature drops and the phase transition occurs in the chiral smectic C phase (SmC * phase), the electric field is made zero. This liquid crystal alignment means is called monostabilization.

  Theoretically, the above-mentioned monostabilization method should be able to align the ferroelectric liquid crystal uniformly, but in reality, it is monostabilized, such as by aligning it in a different region from the original alignment. Often causes defects. This may be caused by influences from other structures constituting the panel, such as seals and spacers. In addition, the processing conditions may be inappropriate at the time of liquid crystal injection or liquid crystal monostabilization.

  As shown in FIG. 8, the monostabilization failure 201 often occurs particularly near the inlet 202 of the panel. The vicinity of the injection port 202 is a portion that becomes a passage 203 for all liquid crystal molecules entering the panel at the time of liquid crystal injection. Generally, in order to make the injection port as narrow as possible for the reliability of the panel, the liquid crystal injected into the vicinity of the injection port 202 is locally concentrated. Therefore, the vicinity of the injection port 202 is a portion through which an extremely large amount of liquid crystal passes as compared with other portions of the panel.

Then, the injected liquid crystal causes a frictional effect along the liquid crystal passage 203 to the alignment film in the passage portion. When the effect of friction is remarkable, the effect that the liquid crystal rubs the alignment film appears, and as a result, the alignment of the liquid crystal in that portion is changed. The orientation direction of the liquid crystal produced by the friction effect produced along the passage 203 of the liquid crystal does not necessarily coincide with the orientation processing direction 204 intentionally created by the panel maker. If they do not match, the result will be a monostabilization failure 201 locally.

  In addition, as a measure against monostabilization failure, there may be a method of optimizing liquid crystal injection conditions, alignment treatment conditions, and monostabilization conditions so that no monostabilization failure occurs. It is complicated to put out and the margin for each condition seems to be narrow. As a result of experiments conducted by the inventors, it was impossible to find conditions for completely removing the above-mentioned monostabilization failure.

  Another measure is to adjust the position of the liquid crystal inlet in the liquid crystal panel so that the liquid crystal inlet and display area are as far apart as possible so that monostabilization defects do not enter the display area. Is also possible. However, according to this method, an extra space is generated inside the panel by the distance between the liquid crystal inlet and the display area. In addition, in this method, when aiming to reduce the manufacturing cost, the cost of the peripheral device of the liquid crystal panel, etc., it is generally considered to reduce the panel size, but this is disadvantageous.

Therefore, in the present invention, a space is created as a dummy region outside the panel region where the liquid crystal injection port is provided. When drawing the seal, the dummy area is arranged so that the inlet from the panel side is extended as it is. Next, when the two substrates are overlaid and then cut and cut out to a desired panel size, first, the other cut portions are cut and cut in a state where a dummy area is left in addition to the panel area. At this stage, the panel region and the dummy region are united, and the liquid crystal injection port is temporarily a panel. Next, liquid crystal is injected with a dummy region remaining in the liquid crystal injection port. Finally, after injecting the liquid crystal, the dummy region is immediately divided and separated, and then a mono-stabilization process is performed.

  By the above procedure, the ferroelectric liquid crystal can be oriented in a certain direction without monostabilization failure.

  In the present invention, the liquid crystal injection port and the liquid crystal sealing port do not coincide with each other, and the liquid crystal injection port at the time of liquid crystal injection is divided later. In this specification, the liquid crystal injection port refers to a portion that first comes into contact with the liquid crystal during liquid crystal injection, and the liquid crystal sealing port refers to a portion that finally seals the liquid crystal with an adhesive. .

  The structure of the invention disclosed in this specification is a method for manufacturing a liquid crystal display device having a smectic liquid crystal between a pair of substrates, in which a seal provided with a liquid crystal injection port extending from a liquid crystal sealing port on one substrate is provided. A step of forming a pattern, a step of bonding a pair of substrates, a step of dividing the substrate and forming a pair of substrates in which a liquid crystal sealing port and a liquid crystal injection port are connected, and a smectic liquid crystal between the pair of substrates. A step of injecting from the liquid crystal injection port; and a step of separating the liquid crystal injection port and the liquid crystal sealing port after injecting the liquid crystal.

  In addition, the substrates may be bonded after being divided, and another structure of the invention is a method for manufacturing a liquid crystal display device having a smectic liquid crystal between a pair of substrates. Forming a seal pattern having an extended liquid crystal injection port, dividing one substrate to form a pair of substrates in which the liquid crystal sealing port and the liquid crystal injection port are connected, and between the pair of substrates The method includes a step of injecting a smectic liquid crystal from the liquid crystal injection port, and a step of separating the liquid crystal injection port and the liquid crystal sealing port after injecting the liquid crystal.

  Each of the above structures is characterized in that, in the dividing step, the dividing scribing in the separating step is performed.

  Further, in any one of claims 1 to 3, the smectic liquid crystal is a ferroelectric liquid crystal.

  In the ferroelectric liquid crystal panel, the liquid crystal monostabilization failure can be easily removed without increasing the panel size, and the display quality of the liquid crystal display device can be improved.

  Embodiments of the present invention will be described below.

  A manufacturing procedure of the present invention will be described with reference to FIG.

  First, a space is created as a dummy region 304 outside the panel region 303 where the liquid crystal injection port 302 is provided. When drawing the seal 305, a seal pattern is arranged on the periphery of the panel region 303. The seal pattern is formed so that the opening thereof is separated from the panel region toward the dummy region, thereby forming the liquid crystal injection hole 302. This seal pattern is formed at one place or a plurality of places on the substrate.

  Next, the two substrates are bonded together. (Fig. 1 (A))

  Next, the pair of substrates is divided into a desired panel size having one seal pattern having a liquid crystal inlet 302 and cut out. At this time, as shown in FIG. 1B, the other part 307 is divided and cut out with the part 306 between the panel area 303 and the dummy area 304 remaining. At this stage, the panel area 303 and the dummy area 304 are integrated. Temporarily, the liquid crystal injection port 302 is a single long panel.

  Next, ferroelectric liquid crystal, which is a kind of smectic liquid crystal, is injected from the opening portion of the seal pattern which is the liquid crystal injection port 302. (FIG. 1 (C)) Note that if the monostabilization process is performed immediately after the liquid crystal injection, a monostabilization failure occurs in the vicinity of the dummy region 304.

  Therefore, immediately after liquid crystal injection, the dummy region 304 is divided and separated (FIG. 1D). It can be said that the part to divide is a part which hits between the panel area and the opening of the seal pattern. Thereafter, the monostabilization process 308 is performed. (FIG. 1 (E)) Note that when the dummy region 304 is divided and separated, the liquid crystal orientation disorder 310 may occur due to the influence of the stress applied to the liquid crystal due to the panel separation. Can be removed by a subsequent monostabilization process 308.

  The present invention having the above-described configuration will be described in more detail with the following examples.

[Example 1]
In this example, a structure of a simple matrix ferroelectric liquid crystal panel and a manufacturing process thereof will be described below. Although an example of a simple matrix panel is shown here, it is needless to say that the present invention is not particularly limited and can be applied to an active matrix panel. As the liquid crystal material, a liquid crystal material whose phase sequence is isotropic phase (I phase) → chiral nematic phase (N * phase) → chiral smectic phase (SmC * phase) → crystal phase was used.

2A and 2B are examples of a substrate used when a simple matrix panel is manufactured. On the first glass substrate 401, conductive transparent films made of ITO (Indium Tin Oxide) are arranged in a stripe pattern. In addition, an external extraction wiring group 403 made of aluminum is disposed in each of the stripe patterns 402. The wiring group 403 is electrically connected at one end of the ITO stripe pattern 402, and extends in the opposite direction to the ITO stripe pattern 402. Only one of the wiring groups 403 is electrically connected to one ITO stripe pattern 402.

  A combination of one ITO stripe pattern 402 and one wiring group 403 electrically connected thereto forms a set of address lines 404. The separate address lines 404 are electrically independent from each other. When the panel is formed, the ITO stripe pattern 402 is inside the panel and corresponds to the pixel electrode. On the other hand, the wiring group 403 extends from the inside to the outside of the panel and serves as a lead-out wiring for connecting to the external input terminal.

Similarly to the first substrate 401, the second glass substrate 406 has a set of an ITO stripe pattern 407 and a wiring group 408, and an address line 409 exists. However, the stripe direction is different from that of the first substrate 401, and when the first substrate 401 and the second substrate 406 are overlapped later, the stripe patterns 402 and 407 of the respective substrates intersect. The intersection is formed so as to correspond to each pixel 411 arranged in a matrix.

From the above wiring arrangement, the first and second glass substrates 401 and 406 are both on the side of one of the four sides around the pixel area made up of the ITO stripe patterns 402 and 407. 413 and 414 are concentrated. As shown in FIG. 2C, when both substrates 401 and 406 are overlapped to form one panel 412 later, the wiring group 403 of the first substrate and the wiring group 408 of the second substrate are the panels. Of these four sides, two sides 413 and 414 adjacent to each other are occupied. In other words, of the four sides of the panel, there are two sides 415 and 416 where the wiring groups of both substrates are not arranged. A liquid crystal injection port is arranged on one of the two sides 415 and 416. In the corresponding areas 405 and 410 of the substrates 401 and 406 corresponding to this part, a dummy region 417 is separately provided. Reserve a space in advance.

As shown in FIG. 3, a polyimide alignment film 503 is formed on the first and second substrates 501 and 502 by a printing method. The film thickness is 30 to 100 nm. In the case of a ferroelectric liquid crystal, it seems to be desirable in terms of liquid crystal alignment characteristics to use a horizontal alignment film material in which the pretilt angle of the liquid crystal with respect to the alignment film 503 is about 0 to 1 degree. After the alignment film 503 is printed, preliminary baking is performed at 80 ° C. for 2 minutes on a hot plate, and then main baking is performed at 180 ° C. for 60 minutes in a clean oven.

  Thereafter, rubbing is performed by rubbing the alignment film 503 formed on the first and second substrates in one direction 504A and 504B with a cloth such as rayon. By rubbing, the alignment film 503 can be provided with a function of aligning liquid crystals. The rubbing directions 504A and 504B are made to be antiparallel to each other when the two substrates are overlapped. After rubbing, washing with water and rinsing is performed to remove particles generated in this step.

  An ultraviolet curable sealant 505 is drawn on one of the first and second substrates by a dispensing method. When forming the panel, the sealing material 505 serves as a side wall of the panel and seals the liquid crystal in the panel, and holds a certain gap between the first and second substrates 501 and 502 and bonds them together. Have a role to play. A liquid crystal injection port 506 necessary for introducing liquid crystal into the panel is also formed by drawing a seal pattern in this step. In the liquid crystal panel of this embodiment, a gap of 2 μm is formed. Since the cell gap is thin, the addition of a gap holding material to the sealing material 505, which is normally performed in a TN panel or the like, is unnecessary in this embodiment.

  At this time, the opening portion of the seal pattern, which is the liquid crystal inlet portion, is formed away from the end of the panel region in the direction of the dummy region 507.

On the other hand, the spacers 508 are dispersed on the substrate on which the seal drawing is not performed. The spacer 508 is a spherical substance made of silicon oxide (the diameter of the sphere has a distribution centered at 2 μm). After mixing the spacer 508 (2 mg) in isopropyl alcohol (50 ml), ultrasonic dispersion is performed for 15 minutes. Immediately thereafter, this liquid (2 ml) is dropped onto the substrate and the substrate is rotated at 1500 rpm so that the spacers 508 are dispersed over the entire surface of the substrate. This operation is repeated once more, and as a result, a spray density of 50 to 100 pieces / mm ² is obtained from microscopic observation.

  After performing the above processing on both substrates, they are superimposed. At the time of superposition, a uniform pressure is applied parallel to the normal direction of the substrate to control the distance between the pair of substrates (cell gap). On the other hand, the overlapping jig has a structure in which a part of the surface plate holding the substrate has ultraviolet transparency so that the sealing material can be irradiated with ultraviolet light while applying pressure to the substrate. ing. While maintaining a state in which sufficient pressure is applied to the pair of substrates, the pair of stacked substrates is irradiated with ultraviolet rays to cure the sealing material 505.

  Next, as shown in FIG. 1A, first division is performed on the substrates stacked on each other. The cutting is performed by applying pressure from the back side corresponding to this position after putting ruled lines (scribe lines) 306 and 307 with a glass cutter in the part to be cut. Stress is applied to the scribe line 307 by local pressurization from the back side, and the substrate is divided along the scribe line 307.

  By the first division, individual panels are cut out from the stacked substrates as shown in FIG. In the area corresponding to the pixel area of the panel, two substrates overlap. On the other hand (not shown here), the wiring group extending from the pixel area is exposed to the surface in order to be connected to an external circuit as an external input terminal. At this time, the scribe line is inserted only into the scribe line 306 between the panel region 303 and the liquid crystal injection hole 302 corresponding to the opening, but no division is performed. Accordingly, at this stage, the panel area 303 and the dummy area 304 are cut out in the form of a temporary panel 311 in a state where the panel area 303 and the dummy area 304 are temporarily attached.

  Thereafter, a ferroelectric liquid crystal, which is a kind of smectic liquid crystal, is injected by a dip method (FIG. 1C). First, the system including the temporary panel 311 and the liquid crystal is evacuated. The system is then heated to 100 ° C. to change the liquid crystal to an isotropic phase. In this state, since the viscosity of the liquid crystal is low, the same technique as the injection of normal nematic liquid crystal can be used. Only after this, the liquid crystal injection port 302 of the temporary panel 311 is brought into contact with the liquid crystal to start injecting the liquid crystal. After being injected to some extent by the action of capillary action, the degree of vacuum of the system is gradually lowered and finally returned to normal pressure. In this process, liquid crystal is injected using the pressure difference between the inside of the temporary panel 311 and the system. After confirming that the liquid crystal has been injected into the entire surface of the temporary panel 311, the temperature of the system is gradually returned to room temperature.

  After the liquid crystal is injected, the scribe line 306 inserted between the panel region 303 and the liquid crystal injection port 302 corresponding to the opening is injected by hand before the liquid crystal is injected. I do. (FIG. 1D) When monostabilization is performed without performing the second division, an element that causes a monostabilization failure occurs in the dummy region 304, but the dummy region is generated by the second division. Therefore, there is no element that causes a monostabilization failure in the panel region 303.

  After the dummy region 304 is cut off, an ultraviolet curable resin (not shown here) is applied to the liquid crystal sealing opening 302. Then, the ultraviolet curable resin is cured by ultraviolet irradiation, and the liquid crystal sealing inlet 302 is sealed.

Thereafter, as shown in FIG. 4, FPCs (Flexible Print Circuits) 603 and 606 are connected to external input terminals 602 and 605, which are composed of wiring groups formed on the first and second substrates 601 and 604 of the panel. . The external input terminals 602 and 605 are exposed on the surface when the substrate is divided, and a circuit can be connected from the outside. The FPCs 603 and 606 have copper wiring formed on an organic resin film such as polyimide, and are connected to an external input terminal with an anisotropic conductive adhesive. An anisotropic conductive adhesive is composed of an adhesive and particles having a conductive surface with a diameter of several tens to several hundreds of microns mixed therein and plated with gold or the like. The particles are connected to external input terminals and copper wiring. By making contact with each other, electrical contact is formed between them. The FPCs 603 and 606 are protruded and bonded to the outside of the external input terminals 602 and 605 in order to increase the adhesive strength with the substrate. With anisotropic conductive adhesives, the end resin layer have is provided (not shown here), to enhance the mechanical strength at this portion.

The first FPC 603 connected to the external input terminal 602 of the first substrate 601 and the second FPC 606 connected to the external input terminal 605 of the second substrate 604 are connected to the DC power supply 607. Thereafter, the panel is placed on a hot plate, and a temperature of 100 ° C. is uniformly applied within the panel surface. When the panel is sufficiently heated, the DC power supply 607 is turned on and a DC voltage 608 is applied to the panel. In this step, the same first voltage V1 is applied between all the first FPCs 603, and the same second voltage V2 is also applied between all the second FPCs 606. The potential difference between the first voltage V1 and the second voltage V2 is 5V. Thereafter, the temperature of the hot plate is controlled so that the temperature applied to the panel is gradually lowered while the voltage 608 is applied. In this embodiment, the temperature is controlled at a descending rate of 2.0 ° C./min.

  After the temperature of the hot plate is lowered to 25 ° C., the potential difference between the first voltage V1 and the second voltage V2 is set to 0V. After the FPCs 603 and 606 are removed from the DC power supply 607, the first FPC 603 and the second FPC 606 are short-circuited. Later, when the panel is incorporated in the display device, the short circuit between the FPCs 603 and 606 is released, and then the FPCs 603 and 606 are connected to the drive circuit.

  Thus, a simple matrix display device using a ferroelectric liquid crystal is completed.

[Example 2]
By implementing the present invention, all electronic devices incorporating liquid crystal modules (simple matrix liquid crystal modules or active matrix liquid crystal modules) are completed.

  Such electronic devices include video cameras, digital cameras, head mounted displays (goggles type displays), car navigation systems, projectors, car stereos, personal computers, personal digital assistants (mobile computers, mobile phones, electronic books, etc.), etc. Can be mentioned. Examples of these are shown in FIGS.

FIG. 5A illustrates a personal computer, which includes a main body 2001, an image input portion 2002, a display portion 2003, a keyboard 2004, and the like.

FIG. 5B illustrates a video camera, which includes a main body 2101, a display portion 2102, an audio input portion 2103, operation switches 2104, a battery 2105, an image receiving portion 2106, and the like.

FIG. 5C illustrates a mobile computer, which includes a main body 2201, a camera unit 2202, an image receiving unit 2203, an operation switch 2204, a display unit 2205, and the like.

FIG. 5D illustrates a goggle type display, which includes a main body 2301, a display portion 2302, an arm portion 2303, and the like.

FIG. 5E shows a player using a recording medium (hereinafter referred to as a recording medium) on which a program is recorded, and includes a main body 2401, a display portion 2402, a speaker portion 2403, a recording medium 2404, an operation switch 2405, and the like. This player uses a DVD (Digital Versatile Disc), CD, or the like as a recording medium, and can perform music appreciation, movie appreciation, games, and the Internet.

  FIG. 5F illustrates a digital camera, which includes a main body 2501, a display portion 2502, an eyepiece portion 2503, an operation switch 2504, an image receiving portion (not shown), and the like.

  FIG. 6A illustrates a mobile phone, which includes a main body 2901, an audio output unit 2902, an audio input unit 2903, a display unit 2904, operation switches 2905, an antenna 2906, an image input unit (CCD, image sensor, etc.) 2907, and the like.

  FIG. 6B illustrates a portable book (electronic book), which includes a main body 3001, display portions 3002 and 3003, a storage medium 3004, an operation switch 3005, an antenna 3006, and the like.

  FIG. 6C illustrates a display, which includes a main body 3101, a support base 3102, a display portion 3103, and the like.

  As described above, the applicable range of the present invention is so wide that it can be applied to manufacturing methods of electronic devices in various fields. In addition, the electronic device of this example can be realized by using a configuration including any combination of the embodiment mode, the first example, and the second example.

Process drawing from cutting out the temporary panel from the stacked substrates to the liquid crystal process. The figure which shows a mode when an example of the board | substrate used when producing a ferroelectric liquid crystal panel and both board | substrates were piled up. The figure which shows the process which produces a panel from two board | substrates. The figure which shows the process after FPC attachment. FIG. 11 illustrates an example of an electronic device. FIG. 11 illustrates an example of an electronic device. It is a figure which shows a mode when a ferroelectric liquid crystal is inject | poured into the panel. It is a figure which shows a mode that the passage of a liquid crystal and a monostabilization defect generate | occur | produce.

Claims (6)

Against the first substrate, the liquid crystal sealing port is formed on one side of the panel area, so that the liquid crystal injection port is formed and stretched as the liquid crystal sealing port, forming a sheet Rupatan the periphery of the panel area And
A second substrate is bonded to the first substrate to form a pair of substrates,
Ferroelectric liquid crystal is injected from the liquid crystal injection port into a region surrounded by the seal pattern and the pair of substrates,
After cutting the substrate prior Symbol pair so as to expose the liquid crystal sealing port between the liquid crystal injection port and the panel area, sealing the liquid crystal sealing port,
A method for manufacturing a liquid crystal display device, comprising performing a monostabilization treatment on the ferroelectric liquid crystal . Against the first substrate, the liquid crystal sealing port is formed on one side of the plurality of panel area, and the like liquid crystal sealing port as it stretched liquid crystal inlet is formed, of each of the plurality of panel area shea Rupatan formed on the periphery,
After the second substrate was bonded to the first substrate is subjected to a first cutting process in the first substrate and the second substrate, the pair having one said panel area and said seal pattern Forming the substrate,
Ferroelectric liquid crystal is injected from the liquid crystal injection port into a region surrounded by the seal pattern and the pair of substrates,
After facilities the second cutting processing on the pair of substrates so as to expose the liquid crystal sealing port between the liquid crystal injection port and the panel area, sealing the liquid crystal sealing port,
A method for manufacturing a liquid crystal display device, comprising performing a monostabilization treatment on the ferroelectric liquid crystal . Against the first substrate, the liquid crystal sealing port is formed on one side of the plurality of panel area, and the like liquid crystal sealing port as it stretched liquid crystal inlet is formed, of each of the plurality of panel area form form the sheet Rupatan to the periphery,
Performing a first cutting process on the first substrate to form a second substrate having one of the panel region and the seal pattern;
A third substrate bonded to the second substrate, forming a pair of substrates having one said panel area and said seal pattern,
Ferroelectric liquid crystal is injected from the liquid crystal injection port into a region surrounded by the seal pattern and the pair of substrates,
After facilities the second cutting processing on the pair of substrates so as to expose the liquid crystal sealing port between the liquid crystal injection port and the panel area, sealing the liquid crystal sealing port,
A method for manufacturing a liquid crystal display device, comprising performing a monostabilization treatment on the ferroelectric liquid crystal . In claim 1,
A method for manufacturing a liquid crystal display device, wherein scribing is performed when the pair of substrates is divided. In claim 2 or 3,
A manufacturing method of a liquid crystal display device, characterized in that scribing is performed in the first or second dividing process. In any one of Claims 1 thru | or 5,
A method for manufacturing a liquid crystal display device, wherein the liquid crystal injection port is provided on one side of the pair of substrates when the pair of substrates is formed.

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