JP5535767B2 - Glass welding method - Google Patents

Description

  The present invention relates to a glass welding method for manufacturing a glass welded body in which glass members are welded to each other by irradiation with a laser beam along an annular welding planned region.

  The following are known as glass welding methods in the technical field (see, for example, Patent Documents 1 and 2). That is, a glass substrate including a plurality of effective portions corresponding to the glass members constituting the glass welded body is prepared, and a glass layer is arranged so as to follow the planned welding region for each effective portion with respect to one glass substrate. Subsequently, the other glass substrate is superposed on one glass substrate through the glass layer, and the effective portions are welded together by irradiating the glass layer with laser light along each planned welding region. Then, the welded effective portions are cut out from the glass substrate to obtain a plurality of glass welded bodies.

  By the way, when the glass welded body is, for example, an organic EL display or the like, it is necessary to prevent moisture and the like from entering the light emitting element region surrounded by the planned welding region in the manufacturing process. In view of this, it has been proposed that glass substrates be superposed on each other and laser light irradiation be performed in an inert gas atmosphere (see, for example, Patent Document 1).

JP 2009-104841 A JP 2007-115491 A

  However, it is not preferable to carry out the laser beam irradiation in an inert gas atmosphere from the viewpoint of improving the manufacturing efficiency. On the other hand, when laser light irradiation is performed in an air atmosphere, how to improve the yield becomes a problem.

  This invention is made | formed in view of such a situation, and makes it a subject to provide the glass welding method which can implement laser beam irradiation in air | atmosphere, suppressing the fall of a yield. .

In order to solve the above-mentioned problem, the glass welding method of the present invention is a method for producing a glass welded body in which a first glass member and a second glass member are welded by laser light irradiation along an annular welding scheduled region. A laser welding method for manufacturing a laser beam so that a first glass substrate including a plurality of first portions corresponding to the first glass member is aligned with a planned welding region for each first portion. A first step of disposing a glass layer containing an absorbent material, and a second glass substrate including a plurality of second portions corresponding to the second glass member, each of the first portion and each of the second portions Are stacked on the first glass substrate so as to face each other through the glass layer, and the first glass substrate and the second glass layer are adhered by an adhesive layer disposed so as to surround the first portion and the second portion. Seal the space between the glass substrate from the outside atmosphere And a second step of acquiring a gap information indicating a gap between the first glass substrate and the second glass substrate for each glass layer, and determining a laser light irradiation order based on the gap information. And a fourth step of welding the first portion and the second portion facing each other by irradiating the glass layer with laser light along the planned welding region in accordance with the irradiation order, and a third step . in the process, a plurality of glass layers for which irradiating laser light sequentially, the irradiation sequence is characterized Rukoto is determined so that the ascending order of the gap. Moreover, the glass welding method of this invention is a glass welding for manufacturing the glass welded body by which the 1st glass member and the 2nd glass member were welded by irradiation of the laser beam along the cyclic | annular welding plan area | region. A glass layer containing a laser light absorbing material for a first glass substrate including a plurality of first portions corresponding to the first glass member so as to be along a planned welding region for each first portion. And a second glass substrate including a plurality of second portions corresponding to the second glass member, each of the first portions and each of the second portions via a glass layer. The first glass substrate and the second glass substrate are overlapped with each other by an adhesive layer disposed so as to surround the first portion and the second portion. A second step of sealing the space from the external atmosphere; For each lath layer, obtain gap information indicating the gap between the first glass substrate and the second glass substrate, and determine the irradiation order of the laser light based on the gap information, according to the irradiation order, A fourth step of welding the first portion and the second portion facing each other by irradiating the glass layer with the laser beam along the planned welding region. In the third step, the gap information Based on this, it is determined whether or not the gap is larger than the glass layer thickness by a predetermined value or more. In the fourth step, the glass layer is determined to have a gap larger than the glass layer thickness by a predetermined value or more. The laser light is irradiated to the glass layer that is determined that the gap is not larger than the predetermined value by the thickness of the glass layer. Moreover, the glass welding method of this invention is a glass welding for manufacturing the glass welded body by which the 1st glass member and the 2nd glass member were welded by irradiation of the laser beam along the cyclic | annular welding plan area | region. A glass layer containing a laser light absorbing material for a first glass substrate including a plurality of first portions corresponding to the first glass member so as to be along a planned welding region for each first portion. And a second glass substrate including a plurality of second portions corresponding to the second glass member, each of the first portions and each of the second portions via a glass layer. The first glass substrate and the second glass substrate are overlapped with each other by an adhesive layer disposed so as to surround the first portion and the second portion. A second step of sealing the space from the external atmosphere; For each lath layer, obtain gap information indicating the gap between the first glass substrate and the second glass substrate, and determine the irradiation order of the laser light based on the gap information, according to the irradiation order, A fourth step of welding the first portion and the second portion facing each other by irradiating the glass layer with the laser beam along the planned welding region. In the third step, the gap information Based on this, it is determined whether or not the gap is larger than the thickness of the glass layer by a predetermined value or more. In the fourth step, the glass layer determined to have a gap of a predetermined value or more larger than the thickness of the glass layer is a laser beam. It is excluded from the object irradiated.

  In this glass welding method, the first glass substrate and the second glass substrate are overlapped so as to face each other through the glass layer, and the space between the first glass substrate and the second glass substrate is bonded to the adhesive layer. To seal from the outside atmosphere. Thereby, it becomes possible to carry out the irradiation of the laser light along the planned welding region in the air atmosphere. Further, gap information indicating the gap between the first glass substrate and the second glass substrate is acquired for each glass layer, and the irradiation order of the laser light is determined based on the gap information. Accordingly, the glass layer, which has a high possibility of causing a defect in welding due to poor contact of the glass substrate with the glass layer, is postponed, and the glass layer having a low possibility of causing a defect in welding is preferentially performed. It becomes possible. In other words, when performing laser beam irradiation for each glass layer, if a defect such as the occurrence of cracks in the glass substrate occurs in the middle glass layer, the external atmosphere to the inner region of the glass layer not yet welded However, it is possible to reduce such waste by determining the irradiation order of laser light based on the gap information. Therefore, according to this glass welding method, laser beam irradiation can be performed in an air atmosphere while suppressing a decrease in yield.

Here, in the third step , when a plurality of glass layers to be sequentially irradiated with laser light are determined so that the irradiation order is in order of small gaps, the target is sequentially irradiated with laser light. With respect to the plurality of glass layers, it is possible to appropriately determine the irradiation order of the laser light for preferentially carrying out the welding of the glass layers that are less likely to cause defects in welding.

In the third step , based on the gap information, it is determined whether or not the gap is larger than the glass layer thickness by a predetermined value or more. In the fourth step , the gap is larger than the glass layer thickness by a predetermined value or more. When the glass layer judged to be large is excluded from the target to be irradiated with laser light, it is not necessary to carry out the glass layer welding, which is very likely to cause defects in the welding. Can be planned.

  In the third step, it is preferable that a gap on the side of the glass layer is acquired as the gap information. The gap on the side of the glass layer directly indicates whether or not the glass substrate is in contact with the glass layer, and therefore laser light for prioritizing the welding of the glass layer, which is less likely to cause defects in the welding. The irradiation order can be appropriately determined.

  Alternatively, in the third step, the height of the surface of the second glass substrate opposite to the first glass substrate may be acquired as gap information. The part whose surface height is lower than that of the first glass substrate is such that the gap between the first glass substrate and the second glass substrate is narrow and the glass substrate is reliably in contact with the glass layer. be able to. Alternatively, in the third step, the width of the adhesive layer may be acquired as gap information. It can be determined that the wider the width of the adhesive layer, the narrower the gap between the first glass substrate and the second glass substrate, and the glass substrate is reliably in contact with the glass layer. Therefore, it is possible to appropriately determine the irradiation order of the laser light for preferentially performing the glass layer welding that is less likely to cause defects in the welding.

  Further, the glass welding method of the present invention includes a fifth step of cutting out the welded first part and the second part from the first glass substrate and the second glass substrate to obtain a plurality of glass welded bodies. It is preferable to further provide. Thereby, a plurality of glass welded bodies in which the first glass member and the second glass member are welded can be obtained.

  According to the present invention, laser beam irradiation can be performed in an air atmosphere while suppressing a decrease in yield.

It is a perspective view of the glass welded body manufactured by the glass welding method of one Embodiment of this invention. It is a perspective view for demonstrating the glass welding method for manufacturing the glass welded body of FIG. It is a perspective view for demonstrating the glass welding method for manufacturing the glass welded body of FIG. It is a top view for demonstrating the glass welding method for manufacturing the glass welded body of FIG. It is a partial cross section figure for demonstrating the acquisition method of the clearance information in the glass welding method for manufacturing the glass welded body of FIG. It is a partial cross section figure for demonstrating the glass welding method for manufacturing the glass welded body of FIG. It is a perspective view for demonstrating the glass welding method for manufacturing the glass welded body of FIG. It is a perspective view for demonstrating the glass welding method for manufacturing the glass welded body of FIG. It is a conceptual diagram for demonstrating the other acquisition method of the clearance information in the glass welding method for manufacturing the glass welded body of FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In addition, in each figure, the same code | symbol is attached | subjected to the same or an equivalent part, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 1, the glass welded body 1 is formed by welding a glass member 4 and a glass member 5 through a glass layer 3 disposed along the planned welding region R. The glass members 4 and 5 are, for example, a rectangular plate-like member made of alkali-free glass and having a thickness of 0.7 mm. The welding planned region R is set in a rectangular ring shape along the outer edge of the glass members 4 and 5. Yes. The glass layer 3 is a layer made of, for example, low-melting glass (vanadium phosphate glass, lead borate glass, etc.), and is arranged in a rectangular ring shape along the planned welding region R. This glass welded body 1 is an organic EL display, and the light emitting element region formed inside the planned welding region R is sealed from the outside atmosphere by the glass members 4 and 5 and the glass layer 3.

  Next, a glass welding method for manufacturing the above-described glass welded body 1 by irradiation of the welding laser beam L along the annular welding scheduled region R will be described. First, as shown in FIG. 2, a glass substrate 40 including effective portions (first portions) 41 to 46 arranged in a matrix (here, 2 rows and 3 columns) is prepared. Each effective portion 41 to 46 corresponds to the glass member 4. And the cyclic | annular welding plan area | region R is set for every effective part 41-46.

  Subsequently, the paste layer 6 is disposed on the surface 40a of the glass substrate 40 along the planned welding region R for each of the effective portions 41 to 46 by applying a frit paste by a dispenser, screen printing, or the like. The frit paste is, for example, a powdery glass frit (glass powder) 2 made of low melting glass, a laser light absorbing pigment (laser light absorbing material) that is an inorganic pigment such as iron oxide, an organic solvent such as amyl acetate, In addition, a binder which is a resin component such as acrylic is kneaded.

  Subsequently, the paste layer 6 is dried to remove the organic solvent, and the paste layer 6 is heated to remove the binder, thereby fixing the glass layer 3 to the surface 40 a of the glass substrate 40. Further, the glass layer 3 containing the laser light-absorbing pigment is fixed on the surface 40 a of the glass substrate 40 by heating the glass layer 3 to melt and resolidify the glass frit 2. Subsequently, the adhesive layer 7 is disposed on the surface 40 a of the glass substrate 40 so as to surround the effective portions 41 to 46. The adhesive layer 7 is made of, for example, an ultraviolet curable resin, and is formed in a rectangular ring shape along the outer edge of the glass substrate 40.

  Subsequently, as illustrated in FIG. 3, a glass substrate 50 including effective portions (second portions) 51 to 56 arranged in a matrix (here, 2 rows and 3 columns) is prepared. Each effective part 51-56 respond | corresponds to the glass member 5, and the light emitting element area | region is formed in each effective part 51-56. And the glass substrate 40 and the glass substrate 50 are overlap | superposed so that each of the effective parts 41-46 and each of the effective parts 51-56 may oppose through the glass layer 3. FIG. Subsequently, the adhesive layer 7 is cured by irradiation of ultraviolet rays, and the space between the glass substrate 40 and the glass substrate 50 (the space sandwiched between the effective portions 41 to 46 and the effective portions 51 to 56) is externally provided by the adhesive layer 7. Seal from atmosphere. The glass substrate 40 and the glass substrate 50 are overlapped and sealed with the adhesive layer 7 is performed in an inert gas atmosphere such as nitrogen gas or argon gas.

  Subsequently, gap information indicating a gap between the glass substrate 40 and the glass substrate 50 is acquired for each glass layer 3. Specifically, as shown in FIG. 4, the gap on the side of the glass layer 3 is acquired as gap information for all the glass layers 3 using the interference film thickness meter 8. As shown in FIG. 5, the measurement light is projected and received by the spectral interference type film thickness meter 8 along at least one of the inside and the outside of the annular glass layer 3. And the gap G in at least one of the outer sides is measured. In addition, since the space between the glass substrate 40 and the glass substrate 50 is sealed from the external atmosphere by the adhesive layer 7, acquisition of the gap information is performed in the air atmosphere.

  Subsequently, based on the gap information acquired for each glass layer 3, the irradiation order of the welding laser beam L is determined. Specifically, the irradiation order of the laser light L is determined so that the gap G is in ascending order with respect to a plurality of glass layers 3 (here, all the glass layers 3) to be sequentially irradiated with the laser light L. . However, when it is determined that the gap G is larger than the thickness of the glass layer 3 by a predetermined value or more, the glass layer 3 is excluded from the target irradiated with the laser light L. The predetermined value is preferably 0.5 to 1 times the thickness of the glass layer 3. That is, if the thickness of the glass layer 3 is 20 μm, the predetermined value is 10 μm to 20 μm (the gap G is 30 μm to 40 μm at this time).

  Here, the reason for determining the irradiation order of the laser light L will be described. That is, as shown in FIG. 6A, in a portion where the glass substrate 50 is sufficiently in contact with the glass layer 3 (at this time, the gap G becomes small), the glass layer 3 is melted by irradiation with the laser light L. The heat generated in the part M is distributed and transmitted to both the glass substrate 40 and the glass substrate 50. Thereby, in the glass layer 3 with the small gap | interval G, a possibility that a malfunction may arise in welding becomes low.

  On the other hand, as shown in FIG. 6B, in the portion where the glass substrate 50 is not sufficiently in contact with the glass layer 3 (at this time, the gap G becomes large), the irradiation of the laser beam L causes the The heat generated in the melting part M is transmitted only to the glass substrate 40, and as a result, the glass substrate 40 is in a state of excessive heat input. Thereby, in the glass layer 3 with the large gap | interval G, a possibility that a malfunction may arise in welding, such as a crack generate | occur | producing in the glass substrate 40, becomes high.

  In other words, the order of irradiating the laser beam L is determined by postponing the welding of the glass layer 3, which is likely to cause defects in welding, and prioritizing the welding of the glass layer 3, which is less likely to cause defects in welding. It is to do. The gap G may be an average value of measured values acquired for each glass layer 3, or may be a representative value (a maximum value of measured values, a measured value at a predetermined location, or the like).

  Subsequently, irradiation with the laser light L is performed in accordance with the determined irradiation order of the laser light L. Here, the irradiation order of the laser light L is the glass layer 3 between the effective portions 41 and 51, the glass layer 3 between the effective portions 44 and 54, the glass layer 3 between the effective portions 45 and 55, and between the effective portions 46 and 56. And the glass layer 3 between the effective portions 43 and 53 are determined in this order, and the glass layer 3 between the effective portions 42 and 52 is excluded from the target irradiated with the laser beam L.

  In that case, as shown in FIG. 7, first, the laser light L is irradiated to the glass layer 3 along the planned welding region R of the effective portions 41 and 51. As a result, the glass layer 3 and its peripheral portions (surfaces 40a, 50a of the glass substrates 40, 50) are melted and re-solidified to the same extent, and the effective portions 41, 51 facing each other are welded (in welding, glass In some cases, the layer 3 is melted and the glass substrates 40 and 50 are not melted). Thereafter, the irradiation of the laser beam L is performed in the order described above, and the effective portions 44 and 54, the effective portions 45 and 55, the effective portions 46 and 56, and the effective portions 43 and 53 are sequentially welded. And the effective parts 42 and 52 which oppose do not weld. Since the space between the glass substrate 40 and the glass substrate 50 is sealed from the external atmosphere by the adhesive layer 7, the irradiation with the laser light L is performed in the air atmosphere.

  Subsequently, as shown in FIG. 8, from the glass substrates 40 and 50, the welded effective portions 41 and 51, the effective portions 44 and 54, the effective portions 45 and 55, the effective portions 46 and 56, and The effective portions 43 and 53 are cut out to obtain a plurality (here, 5 sets) of glass welded bodies 1.

  According to the glass welding method described above, the laser beam L can be irradiated in the air atmosphere while suppressing a decrease in yield as follows.

  That is, in the glass welding method described above, the glass substrate 40 and the glass substrate 50 are overlapped so as to face each other with the glass layer 3 therebetween, and the space between the glass substrate 40 and the glass substrate 50 is externally formed by the adhesive layer 7. Seal from atmosphere. Thereby, it becomes possible to perform irradiation of the laser beam L along the planned welding region R in an air atmosphere.

  Furthermore, in the glass welding method described above, gap information indicating the gap G between the glass substrate 40 and the glass substrate 50 is acquired for each glass layer 3, and the irradiation order of the laser light L is determined based on the gap information. . Thereby, the welding of the glass layer 3 that is likely to cause defects in welding due to poor contact of the glass substrate 50 with the glass layer 3 is postponed, and the welding of the glass layer 3 that is less likely to cause defects in welding is prioritized. Can be implemented.

  In other words, when the glass layer 3 is irradiated with the laser beam L and a defect such as the generation of a crack in the glass substrate 40 occurs in the glass layer 3 in the middle, the inner side of the glass layer 3 that has not been welded yet. Since there is a concern about the entry of the external atmosphere into the region, all the parts that have not been welded are wasted. For example, in the case described above, the effective portions 42 and 52 are welded to each other after the effective portions 41 and 51 are welded to each other. Here, the glass substrate 50 is not welded due to poor contact with the glass layer 3. When a failure occurs, the effective portions 43 and 53, the effective portions 44 and 54, the effective portions 45 and 55, and the effective portions 46 and 56 that have not been welded are all wasted, although there is a low possibility of a failure in welding. There is a fear. According to the glass welding method described above, it is possible to reduce such waste by determining the irradiation order of the laser light L based on the gap information.

  Further, in the glass welding method described above, based on the gap information, it is determined whether or not the gap G is larger than the thickness of the glass layer 3 by a predetermined value, and the gap G is larger than the predetermined value than the thickness of the glass layer 3. The glass layer judged to be large is removed from the target irradiated with the laser beam L. Thereby, the efficiency of manufacturing can be further improved without performing the welding of the glass layer 3 which is very likely to cause defects in the welding.

  Moreover, in the glass welding method mentioned above, the clearance gap G in the side of the glass layer 3 is acquired as clearance gap information. The gap G on the side of the glass layer 3 directly indicates whether or not the glass substrate 50 is in contact with the glass layer 3, so that the welding of the glass layer 3 is less likely to cause problems in welding. It is possible to appropriately determine the irradiation order of the laser light L for the purpose.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. For example, the width W of the adhesive layer 7 may be acquired as gap information using a CCD camera or the like as shown in FIG. A portion where the width W of the adhesive layer 7 is wide is assumed to be a portion where the glass substrate 50 is pressed to the glass substrate 40 side. Therefore, it can be determined that the wider the width W of the adhesive layer 7, the narrower the gap between the glass substrate 40 and the glass substrate 50, and the glass substrate 50 is reliably in contact with the glass layer 3.

  9, the height of the surface 50b of the glass substrate 50 opposite to the glass substrate 40 may be acquired as gap information using the laser distance meter 9. The contact state of the glass substrate 50 with respect to the glass layer 3 changes due to the undulation of the glass substrate 50 (in the case of FIG. 9A), the inclination of the glass substrate 50 (in the case of FIG. 9B), and the like. . Therefore, for example, the surface 40b of the glass substrate 40 opposite to the glass substrate 50 is vacuum-adsorbed to a flat surface. At this time, it is determined that the lower the height of the surface 50b of the glass substrate 50 with respect to the glass substrate 40, the narrower the gap between the glass substrate 40 and the glass substrate 50, and the glass substrate 50 is reliably in contact with the glass layer 3. can do.

  In addition, it is not the laser beam L, but all the glass layers 3 to be irradiated with the laser light L that determines the irradiation order of the laser light L so that the gap between the glass substrate 40 and the glass substrate 50 is in ascending order. Are preferably a plurality of glass layers 3 (which can be physically irradiated sequentially with laser light L). For example, in the above embodiment, the effective portions 41 and 51, the effective portions 42 and 52, and the effective portions 43 and 53 are welded together, the effective portions 44 and 54, the effective portions 45 and 55, and the effective portions 46 and 56. It is assumed that the welding between each other is performed by separate laser heads. In that case, the laser beam L is arranged so that the gap is in order of the glass layer 3 between the effective portions 41 and 51, the glass layer 3 between the effective portions 42 and 52, and the glass layer 3 between the effective portions 43 and 53. The laser beam is determined so that the glass layer 3 between the effective portions 44 and 54, the glass layer 3 between the effective portions 45 and 55, and the glass layer 3 between the effective portions 46 and 56 are arranged in ascending order of the gap. The irradiation order of L is determined.

  In the above embodiment, the glass layer 3 containing the laser light absorbing pigment is fixed on the surface 40a of the glass substrate 40 by heating and melting the glass frit 2 to resolidify the glass frit 2. The arrangement of the glass layer 3 with respect to the glass substrate 40 is not limited to this. As an example, the glass layer 3 is disposed on the glass substrate 40 by drying the paste layer 6 to remove the organic solvent, and heating the paste layer 6 to remove the binder, thereby removing the glass layer on the surface 40a of the glass substrate 40. 3 may be fixed. Further, the laser beam L may be irradiated from the glass substrate 40 side.

  In the above embodiment, the adhesive layer 7 is disposed on the glass substrate 40 before the glass substrate 40 and the glass substrate 50 are overlapped with each other. However, the present invention is not limited to this. For example, the adhesive layer 7 may be disposed on the glass substrate 50 before the glass substrate 40 and the glass substrate 50 are overlaid, or after the glass substrate 40 and the glass substrate 50 are overlaid, The adhesive layer 7 may be disposed along the outer edge between the substrate 50 and the substrate 50.

  DESCRIPTION OF SYMBOLS 1 ... Glass welded body, 3 ... Glass layer, 4 ... Glass member (1st glass member), 5 ... Glass member (2nd glass member), 7 ... Adhesive layer, 40 ... Glass substrate (1st glass substrate) ) 41 to 46... Effective portion (first portion), 50... Glass substrate (second glass substrate), 51 to 56... Effective portion (second portion), R. .

Claims (7)

A glass welding method for producing a glass welded body in which a first glass member and a second glass member are welded by irradiation with a laser beam along an annular welding planned area,
A glass layer including a laser light absorbing material is disposed along the planned welding region for each first portion with respect to a first glass substrate including a plurality of first portions corresponding to the first glass member. A first step of:
A second glass substrate including a plurality of second portions corresponding to the second glass member, such that each of the first portions and each of the second portions are opposed to each other through the glass layer. An adhesive layer disposed on the first glass substrate so as to surround and surround the first portion and the second portion, between the first glass substrate and the second glass substrate. A second step of sealing the space from the external atmosphere;
A third step of obtaining, for each glass layer, gap information indicating a gap between the first glass substrate and the second glass substrate, and determining an irradiation order of the laser light based on the gap information; ,
A fourth step of welding the first portion and the second portion facing each other by irradiating the glass layer with the laser light along the planned welding region in accordance with the irradiation order. ,
Wherein in the third step, the plurality of the glass layer to be sequentially irradiated with the laser light, glass fusing method comprising Rukoto determined as the irradiation sequence is ascending order of the gap. A glass welding method for producing a glass welded body in which a first glass member and a second glass member are welded by irradiation with a laser beam along an annular welding planned area,
A glass layer including a laser light absorbing material is disposed along the planned welding region for each first portion with respect to a first glass substrate including a plurality of first portions corresponding to the first glass member. A first step of:
A second glass substrate including a plurality of second portions corresponding to the second glass member, such that each of the first portions and each of the second portions are opposed to each other through the glass layer. An adhesive layer disposed on the first glass substrate so as to surround and surround the first portion and the second portion, between the first glass substrate and the second glass substrate. A second step of sealing the space from the external atmosphere;
A third step of obtaining, for each glass layer, gap information indicating a gap between the first glass substrate and the second glass substrate, and determining an irradiation order of the laser light based on the gap information; ,
A fourth step of welding the first portion and the second portion facing each other by irradiating the glass layer with the laser light along the planned welding region in accordance with the irradiation order. ,
In the third step, based on the gap information, it is determined whether or not the gap is larger than a predetermined value than the thickness of the glass layer,
In the fourth step, the gap is not larger than the predetermined value or more than the thickness of the glass layer in preference to the glass layer that is determined to be larger than the predetermined value or larger than the thickness of the glass layer. the features and be Ruga Las welding method that the laser light is irradiated to the glass layer is determined. A glass welding method for producing a glass welded body in which a first glass member and a second glass member are welded by irradiation with a laser beam along an annular welding planned area,
A glass layer including a laser light absorbing material is disposed along the planned welding region for each first portion with respect to a first glass substrate including a plurality of first portions corresponding to the first glass member. A first step of:
A second glass substrate including a plurality of second portions corresponding to the second glass member, such that each of the first portions and each of the second portions are opposed to each other through the glass layer. An adhesive layer disposed on the first glass substrate so as to surround and surround the first portion and the second portion, between the first glass substrate and the second glass substrate. A second step of sealing the space from the external atmosphere;
A third step of obtaining, for each glass layer, gap information indicating a gap between the first glass substrate and the second glass substrate, and determining an irradiation order of the laser light based on the gap information; ,
A fourth step of welding the first portion and the second portion facing each other by irradiating the glass layer with the laser light along the planned welding region in accordance with the irradiation order. ,
In the third step, based on the gap information, it is determined whether or not the gap is larger than a predetermined value than the thickness of the glass layer,
Wherein in the fourth step, the glass layer in which the gap than the thickness of the glass layer is determined to the predetermined value or more larger, features and be Ruga Las welding to be excluded from the irradiating the laser beam Method.   The glass welding method according to any one of claims 1 to 3, wherein in the third step, the gap on a side of the glass layer is acquired as the gap information.   In the third step, the height of the surface of the second glass substrate opposite to the first glass substrate is acquired as the gap information. The glass welding method according to item.   The glass welding method according to claim 1, wherein in the third step, the width of the adhesive layer is acquired as the gap information.   The method further comprises a fifth step of cutting out the welded first part and the second part from the first glass substrate and the second glass substrate to obtain a plurality of the glass welded bodies. The glass welding method according to any one of claims 1 to 6.

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