JP5492049B2 - 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 above technical field. 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. Therefore, when the glass substrates are overlapped with each other through the glass layers, the space between the glass substrates can be sealed from the external atmosphere by arranging an adhesive layer between the glass substrates so as to surround all the glass layers. It has been proposed (see, for example, Patent Documents 1 and 2). According to this, laser light irradiation can be performed in an air atmosphere while preventing moisture and the like from entering the light emitting element region.

JP 2010-1113830 A JP 2007-115491 A

  However, when a laser beam irradiation is performed for each glass layer, if a defect such as the occurrence of a crack in the glass substrate occurs in the middle glass layer, the external atmosphere to the inner region of the glass layer not yet welded Therefore, there is a possibility that all parts that have not been welded are wasted.

  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 substrate are bonded by an adhesive layer disposed between the first glass substrate and the second glass substrate. The space between the glass substrate and the outside atmosphere A second step of sealing, and a third 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, The adhesive layer divides a predetermined region corresponding to a plurality of sets of the first portion and the second portion facing each other into a plurality of partial regions corresponding to at least one set of the first portion and the second portion facing each other. In addition, it is arranged between the first glass substrate and the second glass substrate so as to surround the predetermined region and to surround the partial region for each partial region.

  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, the adhesive layer converts a predetermined region corresponding to the plurality of sets of the first portion and the second portion facing each other into a plurality of partial regions corresponding to at least one set of the first portion and the second portion facing each other. It arrange | positions between a 1st glass substrate and a 2nd glass substrate so that it may divide | segment and it may surround a partial area | region and it may surround a partial area | region for every partial area | region. Thereby, when laser light irradiation is carried out for each glass layer, even if a defect such as the occurrence of a crack in the glass substrate occurs in the middle glass layer, the partial area where the defective glass layer exists In a partial area other than the above, entry of an external atmosphere into the inner area of the glass layer that has not been welded is prevented. Therefore, according to this glass welding method, laser beam irradiation can be performed in an air atmosphere while suppressing a decrease in yield.

  Here, the adhesive layer preferably has a first adhesive layer pattern that surrounds the predetermined region, and a second adhesive layer pattern that surrounds the partial region for each partial region inside the first adhesive layer pattern. According to this, since the adhesive layer pattern is formed in two rows at the outer periphery of the predetermined region and the boundary between the adjacent partial regions, the first glass substrate and the second glass substrate overlapped before the laser light irradiation is performed. It is possible to reliably prevent the glass substrates from being displaced from each other or damaged.

  Alternatively, the adhesive layer preferably has a first adhesive layer pattern surrounding a predetermined region and a second adhesive layer pattern along the boundary between adjacent partial regions. According to this, since the adhesive layer pattern is arranged in a row at the boundary between the adjacent partial regions, the glass layers adjacent to each other with the boundary interposed therebetween (that is, between a pair of the first portion and the second portion facing each other). The pitch can be reduced.

  In these cases, it is preferable that the width of the first adhesive layer pattern is wider than the width of the second adhesive layer pattern. According to this, since the width of the first adhesive layer pattern is wider than the width of the second adhesive layer pattern at the outer periphery of the predetermined region, the first glass substrate and the second glass substrate that are overlaid are It can prevent more reliably that it mutually shifts or breaks. Furthermore, since the width of the second adhesive layer pattern is narrower than the width of the first adhesive layer pattern at the boundary between adjacent partial regions, the pitch between adjacent glass layers across the boundary can be made smaller. it can.

  The adhesive layer preferably has an adhesive layer pattern that surrounds the partial region for each partial region, and the predetermined region is preferably surrounded by a part of the adhesive layer pattern. According to this, since the adhesive layer pattern is formed in two rows at the boundary between the adjacent partial regions, the first glass substrate and the second glass substrate that are overlaid are displaced from each other before the laser light irradiation is performed. Or damage can be reliably prevented.

  Alternatively, the adhesive layer includes the first adhesive layer pattern surrounding one of the adjacent partial regions, and the other of the adjacent partial regions in the first adhesive layer pattern and the portion along the boundary of the adjacent partial region. Preferably, the predetermined region is surrounded by a part of the first adhesive layer pattern and a part of the second adhesive layer pattern. According to this, since the adhesive layer pattern becomes one row at the boundary between adjacent partial regions, the pitch between adjacent glass layers across the boundary can be reduced.

  Further, the glass welding method of the present invention includes a fourth 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 the 1st Embodiment of this invention. It is a perspective view for demonstrating the glass welding method of the 1st Embodiment of this invention. It is a perspective view for demonstrating the glass welding method of the 1st Embodiment of this invention. It is a perspective view for demonstrating the glass welding method of the 1st Embodiment of this invention. It is a perspective view for demonstrating the glass welding method of the 1st Embodiment of this invention. It is a top view for demonstrating the glass welding method of the 2nd Embodiment of this invention. It is a partial cross section figure for demonstrating the acquisition method of the clearance information in the glass welding method of the 2nd Embodiment of this invention. It is a partial cross section figure for demonstrating the glass welding method of the 2nd Embodiment of this invention. It is a conceptual diagram for demonstrating the other acquisition method of the gap information in the glass welding method of the 2nd Embodiment of this invention. It is a top view for demonstrating the glass welding method of other embodiment of this invention. It is a top view for demonstrating the glass welding method of other embodiment of this invention. It is a top view for demonstrating the glass welding method of other embodiment of this invention.

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 equivalent part, and the overlapping description is abbreviate | omitted.
[First Embodiment]

  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 70 is disposed on the surface 40a of the glass substrate 40 by applying an adhesive such as an ultraviolet curable resin with a dispenser or the like. The adhesive layer 70 surrounds the entire region (predetermined region) W, and surrounds the partial regions P1 to P3 inside the adhesive layer pattern 7 (that is, the partial region P1 for each of the partial regions P1 to P3). (Adhesive layer patterns 71 to 73 surrounding P3). Here, the entire area W is an area corresponding to all the effective portions 41 to 46. The partial areas P1, P2, and P3 are areas corresponding to the effective portions 41 and 44, the effective portions 42 and 45, and the effective portions 43 and 46, respectively. The adhesive layer pattern 71 and the adhesive layer pattern 72 are in contact with each other at the boundary line between the adjacent partial regions P1 and P2, and the adhesive layer pattern 72 and the adhesive layer pattern 73 are between the boundary lines between the adjacent partial regions P2 and P3. In contact. The width of the adhesive layer pattern 7 is wider than the width of the adhesive layer patterns 71 to 73. Note that since the adhesive layer 70 is configured by a simple pattern, it becomes easy to control the timing of dispensing with the dispenser for patterning the adhesive layer 70 and the application of the adhesive, and hardly cause defects.

  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 70 disposed between the glass substrate 40 and the glass substrate 50 is cured by irradiation with ultraviolet rays, and a space between the glass substrate 40 and the glass substrate 50 (a space corresponding to the entire region W, each The space corresponding to the partial regions P <b> 1 to P <b> 3) is sealed from the external atmosphere by the adhesive layer 70. Note that the glass substrate 40 and the glass substrate 50 are overlapped and sealed with the adhesive layer 70 is performed in an inert gas atmosphere such as nitrogen gas or argon gas, or under reduced pressure.

  Thereby, the adhesive layer 70 is separated from the glass substrate 40 so as to divide the entire region W into a plurality of partial regions P1 to P3, and to surround the entire region W and to surround the partial regions P1 to P3. It will be arranged between the glass substrate 50. Here, the entire area W includes the effective portions 41 and 51 facing each other, the effective portions 42 and 52, 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. This is an area corresponding to all pairs. The partial areas P1, P2, and P3 include two sets of effective portions 41 and 51 that face each other and two pairs of effective portions 44 and 54, two sets of effective portions 42 and 52 that face each other, and two pairs of effective portions 45 and 55, respectively. , Regions corresponding to two pairs of effective portions 43 and 53 and effective portions 46 and 56 facing each other.

  Subsequently, as shown in FIG. 4, the glass layer 3 between the effective portions 41 and 51, the glass layer 3 between the effective portions 42 and 52, the glass layer 3 between the effective portions 43 and 53, and between the effective portions 44 and 54. The laser beam L is irradiated in the order of the glass layer 3, the glass layer 3 between the effective portions 45 and 55, and the glass layer 3 between the effective portions 46 and 56. First, when the laser beam L is irradiated on the glass layer 3 between the effective portions 41 and 51 along the planned welding region R, the glass layer 3 and its peripheral portions (the surfaces 40a and 50a of the glass substrates 40 and 50) are the same. The effective portions 41 and 51 facing each other are melted and re-solidified to a degree (the glass layer 3 melts and at least one of the glass substrates 40 and 50 may not melt). Thereafter, the effective portions 42 and 52 facing each other, 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, by irradiation with the laser light L in the order described above. Is welded. Since the space between the glass substrate 40 and the glass substrate 50 is sealed from the external atmosphere by the adhesive layer 70, the irradiation with the laser light L is performed in the air atmosphere.

  Subsequently, as shown in FIG. 5, the effective portions 41 and 51 welded from the glass substrates 40 and 50, the effective portions 42 and 52, the effective portions 43 and 53, the effective portions 44 and 54, and the effective portions 44 and 54, respectively. The portions 45 and 55 and the effective portions 46 and 56 are cut out to obtain a plurality (here, 6 sets) of the glass welded bodies 1.

  According to the glass welding method of the first embodiment, 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 of the first embodiment, the glass substrate 40 and the glass substrate 50 are overlapped so as to face each other with the glass layer 3 interposed therebetween, and the space between the glass substrate 40 and the glass substrate 50 is bonded. A layer 70 seals from the outside 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 of the first embodiment, the adhesive layer 70 divides the entire region W into a plurality of partial regions P1 to P3 and surrounds the entire region W, and each partial region P1 to P1. It arrange | positions between the glass substrate 40 and the glass substrate 50 so that P3 may be surrounded. As a result, as shown in FIG. 4, when the laser beam L is irradiated for each glass layer 3, defects such as the occurrence of cracks in the glass substrates 40 and 50 are caused, for example, by the effective portions 42 and 52. In the partial regions P1 and P3 other than the partial region P2 in which a failure has occurred, the external atmosphere is prevented from entering the inner region of the glass layer 3 that has not been welded.

  A specific example will be described. When troubles such as generation of cracks in the glass substrates 40 and 50 occur in the glass layer 3 in the middle, there is a concern that an external atmosphere enters the inner region of the glass layer 3 that has not been welded. Therefore, for example, when the adhesive layer 70 does not have the adhesive layer patterns 71 to 73 but includes only the adhesive layer pattern 7, there is a possibility that all parts that have not been welded are wasted. That is, after the effective portions 41 and 51 are welded to each other, the effective portions 42 and 52 are welded to each other. If a failure occurs, the effective portions 43 and 53, the effective portions 44 and 54 that are not welded, The portions 45 and 55 and the effective portions 46 and 56 may all be wasted.

  On the other hand, in the glass welding method of the first embodiment, not only the entire region W but also the partial regions P1 to P3 are surrounded by the adhesive layer 70 and closed. Therefore, even if a defect occurs due to welding between the effective portions 42 and 52, only the effective portions 45 and 55 existing in the defective partial area P2 may be wasted due to concern about the entrance of the external atmosphere. It turns out that. Thus, according to the glass welding method of the first embodiment, waste can be reduced and yield can be improved.

  In the glass welding method of the first embodiment, the adhesive layer 70 surrounds the entire region W, and the adhesive layer pattern that surrounds the partial regions P1 to P3 inside the adhesive layer pattern 7. 71-73. That is, the adhesive layer pattern is formed in two rows on the outer periphery of the entire region W, the boundary between the adjacent partial regions P1 and P2, and the boundary between the partial regions P2 and P3. Thereby, before irradiating with the laser beam L, it can prevent reliably that the laminated | stacked glass substrates 40 and 50 mutually shift or break.

Moreover, in the glass welding method of 1st Embodiment, the width | variety of the contact bonding layer pattern 7 surrounding the whole area | region W is made wider than the width | variety of the contact bonding layer patterns 71-73 surrounding each partial area | region P1-P3. Yes. This also contributes to prevention of deviation and breakage in the stacked glass substrates 40 and 50. In other words, the widths of the adhesive layer patterns 71 to 73 are narrower than the width of the adhesive layer pattern 7 at the boundary between the adjacent partial regions P1 and P2 and the boundary between the partial regions P2 and P3. Thereby, the pitch between the adjacent glass layers 3 and 3 across the boundary can be reduced.
[Second Embodiment]

  The glass welding method of 2nd Embodiment is for manufacturing the glass welded body 1 similarly to the glass welding method of 1st Embodiment, and the clearance gap information which shows the clearance gap between the glass substrate 40 and the glass substrate 50 is shown. Is different from the glass welding method of the first embodiment in that the irradiation order of the welding laser beam L is determined based on the above. Hereinafter, this difference will be mainly described.

  First, the glass substrate 40 and the glass substrate 50 are overlapped in the same procedure as the glass welding method of the first embodiment, and the space between the glass substrate 40 and the glass substrate 50 is sealed from the external atmosphere by the adhesive layer 70. Stop. 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. 6, the gap on the side of the glass layer 3 is acquired as gap information for all the glass layers 3 using the spectral interference film thickness meter 8. As shown in FIG. 7, 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 70, the 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 for each of the partial regions P1 to P3. Specifically, the irradiation order of the laser light L is determined so that the gap G is in ascending order for each of the partial regions P1 to P3. 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 within 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 within 10 μm to 20 μm (at this time, the gap G is within 30 μm to 40 μm).

  Here, the reason for determining the irradiation order of the laser light L will be described. That is, as shown in FIG. 8A, 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 the laser light L irradiation. 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. 8B, 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 light L causes the glass layer 3 to 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 for each of the partial regions P1 to P3 in accordance with the irradiation order of the laser light L determined for each of the partial regions P1 to P3 (see FIG. 4). Here, the irradiation order of the laser light L is determined in the order of the glass layer 3 between the effective portions 41 and 51 and the glass layer 3 between the effective portions 44 and 54 in the partial region P1, and in the partial region P3, It is assumed that the order of the glass layer 3 between the effective portions 46 and 56 and the glass layer 3 between the effective portions 43 and 53 are determined. In the partial region P2, the glass layer 3 between the effective portions 42 and 52 is excluded from the irradiation target of the laser light L, and only the glass layer 3 between the effective portions 45 and 55 is the irradiation target of the laser light L. To do.

  In that case, in the partial region P1, the laser light L is irradiated in the order of the glass layer 3 between the effective portions 41 and 51 and the glass layer 3 between the effective portions 44 and 54, and the effective portions 41 and 51 are effectively connected to each other. The portions 44 and 54 are welded sequentially. In the partial region P2, the laser beam L is irradiated only on the glass layer 3 between the effective portions 45 and 55, the effective portions 45 and 55 are welded together, and the effective portions 42 and 52 are not welded together. In the partial region P3, the laser light L is irradiated in the order of the glass layer 3 between the effective portions 46 and 56 and the glass layer 3 between the effective portions 43 and 53, and the effective portions 46 and 56, 53 are sequentially welded. For example, if a plurality of laser beams emitted from separate laser heads for each of the partial regions P1 to P3 are used as the laser beam L, the tact time can be improved.

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

  According to the glass welding method of the second embodiment, similarly to the glass welding method of the first embodiment, it is possible to perform the irradiation with the laser light L in the air atmosphere while suppressing a decrease in yield.

  Furthermore, in the glass welding method of the second embodiment, gap information indicating the gap G between the glass substrate 40 and the glass substrate 50 is acquired for each glass layer 3, and irradiation of the laser light L is performed based on the gap information. Determine the order. 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 the glass welding method of the second embodiment, based on the gap information, it is determined whether the gap G is larger than the thickness of the glass layer 3 by a predetermined value or more, and the gap G is larger than the thickness of the glass layer 3. The glass layer 3 that is determined to be larger than a predetermined value is excluded 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 of 2nd Embodiment, 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.

  In the glass welding method of the second embodiment, the width W of the adhesive layer 70 may be acquired as gap information as shown in FIG. 6 using a CCD camera or the like. A portion where the width W of the adhesive layer 70 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 70, 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.

  Although the first and second embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments.

  For example, as shown in FIG. 10, the adhesive layer 70 includes an adhesive layer pattern 7 that surrounds the entire region W, and an adhesive layer pattern 71 that extends along the boundary between the adjacent partial regions P1 and P2 and the boundary between the partial regions P2 and P3. , 72 may be included. Also in this case, the adhesive layer 70 is a glass substrate so as to divide the entire region W into a plurality of partial regions P1 to P3, and surround the entire region W and surround each of the partial regions P1 to P3. 40 and the glass substrate 50.

  According to the adhesive layer 70, since the adhesive layer pattern is arranged in a row at the boundary between the adjacent partial regions P1 and P2 and the boundary between the partial regions P2 and P3, it is between the adjacent glass layers 3 and 3 across the boundary. The pitch can be reduced. Furthermore, the fact that the width of the adhesive layer patterns 71 and 72 is narrower than the width of the adhesive layer pattern 7 also contributes to reducing the pitch between the adjacent glass layers 3 and 3 across the boundary. Here, since the adhesive layer patterns 71 and 72 are straight, the scanning speed of the dispenser for patterning them can be increased.

  As shown in FIG. 11, the adhesive layer 70 surrounds the partial regions P1 to P3 (that is, surrounds the partial regions P1 to P3 for each partial region P1 to P3). The entire region W may be surrounded by a part of the adhesive layer patterns 71 to 73 gathering. Also in this case, the adhesive layer 70 is a glass substrate so as to divide the entire region W into a plurality of partial regions P1 to P3, and surround the entire region W and surround each of the partial regions P1 to P3. 40 and the glass substrate 50. The adhesive layer pattern 71 and the adhesive layer pattern 72 are in contact with each other at the boundary line between the adjacent partial regions P1 and P2, and the adhesive layer pattern 72 and the adhesive layer pattern 73 are in the adjacent partial regions P2 and P3. Touching at the boundary.

  According to the adhesive layer 70, since the adhesive layer pattern is formed in two rows at the boundary between the adjacent partial regions P1 and P2 and the boundary between the partial regions P2 and P3, it is overlapped before the laser light L is irradiated. Further, it is possible to reliably prevent the glass substrates 40 and 50 from being displaced from each other or damaged. Further, since the adhesive layer 70 is configured by a simple pattern, it becomes easy to control the timing of dispensing with the dispenser for patterning the adhesive layer 70 and the application of the adhesive, and hardly cause defects.

  Further, as shown in FIG. 12, the adhesive layer 70 includes a partial adhesive region 70 that surrounds the partial region P1 and a portion along the boundary between the adjacent partial regions P1 and P2 in the adhesive layer pattern 71. The adhesive layer pattern 72 that surrounds P2 and the adhesive layer pattern 73 that surrounds the partial region P3 by the portion along the boundary between the adjacent partial regions P2 and P3 of the adhesive layer pattern 72. The entire region W may be surrounded by a collection of a part of .about.73. Also in this case, the adhesive layer 70 is a glass substrate so as to divide the entire region W into a plurality of partial regions P1 to P3, and surround the entire region W and surround each of the partial regions P1 to P3. 40 and the glass substrate 50.

  According to the adhesive layer 70, since the adhesive layer pattern is arranged in a row at the boundary between the adjacent partial regions P1 and P2 and the boundary between the partial regions P2 and P3, it is between the adjacent glass layers 3 and 3 across the boundary. The pitch can be reduced.

  In all the adhesive layers 70 described above (including the adhesive layers 70 of the first embodiment and the second embodiment), when the adhesive is applied by a dispenser or the like, the beginning and end portions of the adhesive layer pattern It is preferable to concentrate the connecting portion on the adhesive layer pattern surrounding the entire region W. According to this, even when the glass substrate 40 and the glass substrate 50 are overlapped with each other, the glass layer 3 can be prevented from being affected even if the starting portion and the connecting portion of the raised adhesive layer pattern are crushed. . Moreover, even if a stringing failure occurs when applying the adhesive by a dispenser or the like, it is possible to prevent a situation where the glass layer 3 or the effective portion of the glass substrate 40 is crossed.

  In addition, instead of all the entire areas W described above (including the entire areas W of the first embodiment and the second embodiment), that is, the entire areas W corresponding to the entire set of effective portions facing each other. A predetermined region corresponding to a plurality of sets of effective portions facing each other (a plurality of sets excluding at least one set (dummy set or the like) from all sets) may be applied. At this time, the adhesive layer 70 is formed between the glass substrate 40 and the glass substrate 50 so as to divide the predetermined region into a plurality of partial regions and surround the predetermined region and surround the partial region for each partial region. Arranged between. Further, the partial region is not limited to one corresponding to two sets of effective portions facing each other, and may be any region corresponding to at least one set of effective portions facing each other. For example, if a plurality of partial regions are set so as to correspond to each set of effective portions facing each other, the glass substrate 40 can be used when the laser light L is irradiated for each glass layer 3. , 50, even if a defect such as a crack occurs in the glass layer 3 in the middle, only the effective portion corresponding to the glass layer 3 becomes defective.

  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 70 is disposed on the glass substrate 40 before the glass substrate 40 and the glass substrate 50 are overlapped, but the present invention is not limited to this. For example, the adhesive layer 70 may be disposed on the glass substrate 50 before the glass substrate 40 and the glass substrate 50 are overlaid.

  DESCRIPTION OF SYMBOLS 1 ... Glass welded body, 3 ... Glass layer, 4 ... Glass member (1st glass member), 5 ... Glass member (2nd glass member), 7, 71-73 ... Adhesion layer pattern, 70 ... Adhesion layer, 40 ... Glass substrate (first glass substrate), 41-46 ... Effective portion (first portion), 50 ... Glass substrate (second glass substrate), 51-56 ... Effective portion (second portion), R ... planned welding region, W ... entire region, P1-P3 ... partial region, L ... laser beam.

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. Between the first glass substrate and the second glass substrate by an adhesive layer placed on the first glass substrate and disposed between the first glass substrate and the second glass substrate. A second step of sealing the space from the outside atmosphere;
A third 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,
The adhesive layer has a plurality of regions corresponding to at least one set of the first portion and the second portion facing each other, with a predetermined region corresponding to the plurality of pairs of the first portion and the second portion facing each other. It is arranged between the first glass substrate and the second glass substrate so as to be divided into partial regions and so as to surround the predetermined region and to surround the partial region for each partial region. A glass welding method characterized by that.   The adhesive layer has a first adhesive layer pattern that surrounds the predetermined region, and a second adhesive layer pattern that surrounds the partial region for each partial region inside the first adhesive layer pattern. 2. The glass welding method according to claim 1, wherein the glass welding method is performed.   2. The glass welding method according to claim 1, wherein the adhesive layer has a first adhesive layer pattern surrounding the predetermined area and a second adhesive layer pattern along a boundary between the adjacent partial areas.   4. The glass welding method according to claim 2, wherein the width of the first adhesive layer pattern is wider than the width of the second adhesive layer pattern. 5. The adhesive layer has an adhesive layer pattern surrounding the partial area for each partial area;
The glass welding method according to claim 1, wherein the predetermined region is surrounded by a part of the adhesive layer pattern gathering. The adhering layer includes the first adhering layer pattern surrounding one of the adjoining partial regions, and the portion adjacent to the adjacent partial region of the first adhesive layer pattern. Having a second adhesive layer pattern surrounding the other of the region;
The glass welding method according to claim 1, wherein the predetermined region is surrounded by a part of the first adhesive layer pattern and a part of the second adhesive layer pattern.   The method further comprises a fourth step of cutting 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.

Images