WO2017098757A1

WO2017098757A1 - Glass plate and manufacturing method for glass plate

Info

Publication number: WO2017098757A1
Application number: PCT/JP2016/075476
Authority: WO
Inventors: 伊藤　淳; 郁夫長澤
Original assignee: 旭硝子株式会社
Priority date: 2015-12-08
Filing date: 2016-08-31
Publication date: 2017-06-15
Also published as: TW201720770A; JP2019023146A

Abstract

This manufacturing method includes: a step of preparing a glass material having first and second major surfaces, the glass material having edge surfaces that connect the first major surface and the second major surface via connection lines; and a step of forming, on the first major surface, dividing lines configured from laser modified regions. The dividing lines are configured from one or more product lines and one or more release lines. The product lines correspond to outlines of glass products to be separated and collected from the glass material, and the release lines correspond to parts of the dividing lines other than the product lines. The dividing lines extend in a depth direction from the first major surface toward the second major surface. On the first major surface, none of the release lines are connected with the connection lines.

Description

Glass plate and method for producing glass plate

The present invention relates to a glass plate and a method for producing the glass plate.

In order to separate and collect a plurality of glass articles (for example, glass products) from a large glass plate, a technique for forming a cutting line for cutting by irradiating the glass plate with a laser is known (Patent Document 1). In this technique, first, a cutting line corresponding to the final shape of the glass article is formed on the glass plate by laser irradiation. Next, a glass article having a desired shape can be collected by dividing the glass plate along a dividing line.

US Patent Application Publication No. 2015/0166393 Special table 2013-536081 gazette US Patent Application Publication No. 2012/0196071

In the glass plate in which the above-described dividing line is introduced, the inventors of the present application often break the glass plate into a plurality of parts unintentionally before the actual separation step. I noticed that there was (hereinafter referred to as “pre-breaking phenomenon”).

When such a pre-splitting phenomenon occurs, handling of the subsequent glass plate becomes complicated, and in particular, the end face of the glass article is damaged or cracked, resulting in a problem that the quality of the glass article is deteriorated. obtain.

The present invention has been made in view of such a background, and an object of the present invention is to provide a method for producing a glass plate in which a pre-splitting phenomenon hardly occurs. Another object of the present invention is to provide a glass plate that is less prone to pre-splitting.

In the present invention, a glass plate,
A first main surface and a second main surface facing each other;
An end face connecting the first main surface and the second main surface;
Have
A plurality of dividing lines are formed on the first main surface,
The dividing line includes one or more product lines and one or more release lines, and the product line corresponds to a contour line of a glass article separated and collected from the glass plate, and the release line Corresponds to the part other than the product line in the dividing line,
The dividing line extends in the depth direction from the first main surface toward the second main surface,
When the boundary between the first main surface and the end face and the boundary between the second main surface and the end face are referred to as connection lines,
(I) On the first main surface, none of the release lines is connected to the connection line, or (II) on the first main surface, the first of the first release lines If the end is connected to the first connection line,
(I) the first release line has a second end connected to the product line such that further stretching is prevented by the product line; or (ii) in any form other than (i), When the second end of one release line is connected to the product line, the first release line, one or more of the product lines, and one or more of the other release lines are As a continuous line segment along the stretchable direction of the first release line, the continuous line segment is different from the first connection line on the first main surface of the glass plate. A glass plate is provided that does not cross to the connecting line.

Further, in the present invention, a method for producing a glass plate,
(1) A step of preparing a glass material having a first main surface and a second main surface facing each other, wherein the glass material connects the first main surface and the second main surface. A step having an end face;
(2) forming a cutting line composed of a laser modified region on the first main surface by irradiating a laser on the first main surface side of the glass material;
Have
The dividing line includes one or more product lines and one or more release lines, and the product line corresponds to a contour line of a glass article separated and collected from the glass material, and the release line Corresponds to the part other than the product line in the dividing line,
The dividing line extends in the depth direction from the first main surface toward the second main surface,
When the boundary between the first main surface and the end face and the boundary between the second main surface and the end face are referred to as connection lines,
(I) On the first main surface, none of the release lines is connected to the connection line, or (II) on the first main surface, the first of the first release lines If the end is connected to the first connection line,
(I) the first release line has a second end connected to the product line such that further stretching is prevented by the product line; or (ii) in any form other than (i), When the second end of one release line is connected to the product line, the first release line, one or more of the product lines, and one or more of the other release lines are As a continuous line segment along the stretchable direction of the first release line, the continuous line segment is different from the first connection line on the first main surface of the glass plate. A manufacturing method is provided that does not cross the connecting line.

Furthermore, in the present invention, a method for producing a glass plate,
(1) A step of preparing a glass material having a first main surface and a second main surface facing each other, wherein the glass material connects the first main surface and the second main surface. A step having an end face;
(2) forming a product line composed of a laser modified region on the first main surface by irradiating a laser on the first main surface side of the glass material;
(3) forming a release line on the first or second main surface of the glass material before the step (2) or after the step (2);
Have
The product line corresponds to a contour line of a glass article separated and collected from the glass material, and the release line corresponds to a part other than the product line,
The product line extends in the depth direction from the first main surface toward the second main surface, and the release line extends from the first main surface toward the second main surface. Or extending in the depth direction from the second main surface toward the first main surface,
When the boundary between the first main surface and the end face and the boundary between the second main surface and the end face are referred to as connection lines,
(I) On the first main surface, none of the release lines is connected to the connection line, or (II) on the first main surface, the first of the first release lines If the end is connected to the first connection line,
(I) the first release line has a second end connected to the product line such that further stretching is prevented by the product line; or (ii) in any form other than (i), When the second end of one release line is connected to the product line, the first release line, one or more of the product lines, and one or more of the other release lines are As a continuous line segment along the stretchable direction of the first release line, the continuous line segment is different from the first connection line on the first main surface of the glass plate. A manufacturing method is provided that does not cross the connecting line.

In addition, in the manufacturing method of the above-mentioned glass plate, even if the glass raw material in the process of (1) manufactured by the person who implements the said manufacturing method, it may have purchased from the third party.

In the present invention, it is possible to provide a method for producing a glass plate in which pre-cutting phenomenon is unlikely to occur. Moreover, in this invention, it becomes possible to provide the glass plate which is hard to produce a pre-splitting phenomenon.

It is a schematic perspective view of the conventional glass plate. It is a schematic perspective view of the glass plate by one Embodiment of this invention. It is a typical partial enlarged view of the release line formed in the 1st main surface of the glass plate by one Embodiment of this invention. It is a schematic perspective view of another glass plate by one Embodiment of this invention. It is the figure which showed typically an example of the relationship between a release line and a product line. It is the figure which showed typically another example of the relationship between a release line and a product line. It is the figure which showed the one aspect | mode of the line for parting in the glass plate by one Embodiment of this invention. It is the figure which showed the one aspect | mode of the line for parting in the glass plate by one Embodiment of this invention. It is the figure which showed the one aspect | mode of the line for parting in the glass plate by one Embodiment of this invention. It is a schematic perspective view of the another glass plate by one Embodiment of this invention. It is the flowchart which showed roughly an example of the manufacturing method of the glass plate by one Embodiment of this invention. It is the perspective view which showed typically an example of the glass raw material used for the manufacturing method of the glass plate by one Embodiment of this invention. It is the figure which showed typically an example of the parting line extended in the X direction formed in the glass raw material. It is the figure which showed typically an example of the form of the line for parting formed in the glass raw material. It is the flowchart which showed roughly an example of another manufacturing method of the glass plate by one Embodiment of this invention. It is the flowchart which showed roughly an example of another manufacturing method of the glass plate by one Embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

(Conventional glass plate)
In order to better understand the configuration and features of the present invention, a conventional glass plate will be briefly described with reference to FIG.

FIG. 1 shows a schematic perspective view of a conventional glass plate 1.

As shown in FIG. 1, the conventional glass plate 1 has a first main surface 12 and a second main surface 14. However, in FIG. 1, the 2nd main surface 14 cannot be visually recognized. Further, the conventional glass plate 1 has four end faces 16, 17, 18, and 19 that connect the first main surface 12 and the second main surface 14.

The conventional glass plate 1 has three dividing lines 20 on the first main surface 12 extending from the first end surface 16 to the second end surface 17 along the longitudinal direction (X direction). Moreover, the conventional glass plate 1 has nine dividing lines 25 extending from the third end surface 18 to the fourth end surface 19 along the width direction (Y direction) on the first main surface 12.

These X-direction and Y-

direction dividing lines

20 and 25 are both formed by laser irradiation. Therefore, the

dividing lines

20 and 25 correspond to the laser modification region.

The

dividing lines

20 and 25 are formed to separate and collect the glass article 60 from the conventional glass plate 1 later. That is, the

dividing lines

20 and 25 form a contour line of the glass article 60 to be separated later.

However, the cutting line 20 in the X direction has a release line 32 in the X direction in addition to a portion corresponding to the contour line in the X direction of the glass article 60 (referred to as “product line 30 in the X direction”). Similarly, the cutting line 25 in the Y direction has a release line 37 in the Y direction in addition to a portion corresponding to the contour line in the Y direction of the glass article 60 (referred to as “product line 35 in the Y direction”).

The left X-direction release line 32 of the X-direction dividing line 20 extends from the first end face 16 and merges with the X-direction product line 30. Further, the right X-direction release line 32 of the X-direction dividing line 20 extends from the second end face 17 and merges with the X-direction product line 30. As a result, the X-direction cutting line 20 extending from the first end face 16 to the second end face 17 is configured by the X-direction product line 30 and the X-direction release line 32.

Similarly, the lower Y-direction release line 37 of the Y-direction dividing line 25 extends from the third end face 18 and merges with the Y-direction product line 35. The upper Y-direction release line 37 of the Y-direction dividing line 25 extends from the fourth end surface 19 and merges with the Y-direction product line 35. As a result, the product line 35 in the Y direction and the release line 37 in the Y direction form a cutting line 25 in the Y direction that extends from the third end surface 18 to the fourth end surface 19.

Note that the release lines 32 and 37 are arranged to facilitate the separation of the glass article 60 from the conventional glass plate 1.

That is, when the conventional glass plate 1 does not have the release lines 32 and 37, the process of separating each glass article 60 from the conventional glass plate 1 is a so-called “hollow process”. For this reason, especially when the glass plate 1 is thick, when trying to pull out the glass article 60 from the conventional glass plate 1 in the thickness direction, it is caught between the surrounding portions of the conventional glass plate 1 and separation occurs. It may become difficult to occur.

On the other hand, when the conventional glass plate 1 has the release lines 32 and 37, the process of separating each glass article 60 from the conventional glass plate 1 can be a “non-hollow process”. Therefore, separation of the glass article 60 from the surrounding portion is facilitated.

Here, in the configuration of the conventional glass plate 1, the inventors of the present application often break the glass plate 1 into a plurality of pieces at a stage prior to the actual separation step, and this tendency becomes severe. It has been found that a phenomenon occurs in which the glass article 60 is separated from the glass plate 1 (hereinafter referred to as “pre-breaking phenomenon”).

The pre-splitting phenomenon tends to occur particularly when stress is applied to the conventional glass plate 1. For example, the conventional glass plate 1 may pass through various processes, such as a conveyance process, a chemical strengthening process, a film-forming process, and a washing process, before the separation process of the glass article 60. The pre-splitting phenomenon is likely to occur due to the effects of heat load, self-weight load, vibration, and the like in such a process.

When such a pre-splitting phenomenon occurs, handling of the glass plate 1 thereafter becomes complicated, and particularly, the end surface of the glass article 60 is scratched or cracked, so that the quality of the glass article 60 is deteriorated. Problems can arise.

In particular, the conventional glass plate 1 is originally used to cope with the problem that handling is complicated in the plurality of small pieces of glass article 60. However, when the pre-splitting phenomenon occurs, there is a problem that such countermeasures cannot be utilized.

(Configuration and features of one embodiment of the present invention)
In contrast, in one embodiment of the present invention, a glass plate,
A first main surface and a second main surface facing each other;
An end face connecting the first main surface and the second main surface via a connecting line;
Have
A plurality of dividing lines are formed on the first main surface,
The dividing line includes one or more product lines and one or more release lines, and the product line corresponds to a contour line of a glass article separated and collected from the glass plate, and the release line Corresponds to the part other than the product line in the dividing line,
The dividing line extends in the depth direction from the first main surface toward the second main surface,
(I) On the first main surface, none of the release lines is connected to the connection line, or (II) on the first main surface, the first of the first release lines If the end is connected to the first connection line,
(I) the first release line has a second end connected to the product line such that further stretching is prevented by the product line; or (ii) in any form other than (i), When the second end of one release line is connected to the product line;
The first release line, the one or more product lines, and the one or more other release lines constitute a continuous line segment along the stretchable direction of the first release line as a whole. And the glass plate which the said continuous line segment does not cross | intersect from the said 1st connection line to another connection line in the said 1st main surface of the said glass plate is provided.

The glass plate having such a feature can significantly suppress the problem of the pre-splitting phenomenon that the glass plate is split at an unintended stage, as will be described in detail later.

Further, in the glass plate having such a feature, it becomes possible to separate the glass article from the glass plate in a necessary process (that is, a separation process), and scratches or cracks are generated on the end surface of the glass article. It is possible to significantly suppress the problem that the quality of the article is deteriorated.

(Glass plate according to an embodiment of the present invention)
Next, with reference to FIG. 2, the specific structure of the glass plate by one Embodiment of this invention is demonstrated.

FIG. 2 shows a schematic perspective view of a glass plate (hereinafter referred to as “first glass plate”) according to an embodiment of the present invention.

As shown in FIG. 2, the first glass plate 100 has a first main surface 112 and a second main surface 114. However, in FIG. 2, the second main surface 114 cannot be visually recognized. The first glass plate 100 has four end faces 116, 117, 118, and 119 that connect the first main surface 112 and the second main surface 114.

The first glass plate 100 has a substantially rectangular shape in a top view. Accordingly, the first end surface 116 and the second end surface 117 are opposed to each other, and the third end surface 118 and the fourth end surface 119 are also opposed to each other.

In the present application, an adjacent (boundary) portion between the first main surface 112 and each of the end faces 116 to 119 is referred to as a “connection line”. Specifically, the first main surface 112 and the first end surface 116 are connected by a first connection line 146, and the first main surface 112 and the second end surface 117 are connected by a second connection line 147. The first main surface 112 and the third end surface 118 are connected by a third connection line 148, and the first main surface 112 and the fourth end surface 119 are connected by a fourth connection line 149. The

Referring to FIG. 2 again, the first glass plate 100 has three dividing lines 120 extending along the longitudinal direction (X direction) on the first main surface 112 and in the width direction (Y direction). And nine dividing lines 125 extending along the line.

The piece portion surrounded by the

dividing lines

120 and 125 corresponds to the glass article 160 that is separated and collected from the first glass plate 100 in a later separation step. In the example shown in FIG. 2, a total of 16 substantially rectangular glass articles 160 can be separated and collected in the separation step.

In the example shown in FIG. 2, each X-direction dividing line 120 includes an X-direction product line 130 and an X-direction release line 132.

Here, the X-direction product line 130 is an X-direction dividing line that constitutes at least part of the outline of the glass article 160 when the glass article 160 is separated from the first glass plate 100. Means 120. On the other hand, the release line 132 in the X direction means a portion other than the product line 130 in the dividing line 120 in the X direction.

According to this definition, in the example of FIG. 2, one X-direction dividing line 120 includes a first release line 132 a extending from the vicinity of the first connection line 146 to the leftmost product line 130, and A total of eight X-direction product lines 130 and a second release line 132b extending from the rightmost product line 130 to the vicinity of the second connection line 147 are configured.

Similarly, the dividing line 125 in the Y direction includes a product line 135 in the Y direction and a release line 137 in the Y direction. For example, in the example of FIG. 2, one Y-direction dividing line 125 includes two release lines 137 a extending from the vicinity of the third connection line 148 to the lowermost product line 135, and a total of two lines. A product line 135 in the Y direction and a second release line 137b extending from the uppermost product line 135 to the vicinity of the fourth connection line 149 are configured.

Here, the first glass plate 100 has the feature (I) shown in the above-mentioned column “About Configuration and Features of One Embodiment of the Present Invention”. That is, in the first glass plate 100, neither the X-direction release line 132 (132a, 132b) nor the Y-direction release line 137 (137a, 137b) is connected to the corresponding connection lines 146 to 149. .

As a result, neither the X-direction dividing line 120 nor the Y-direction dividing line 125 completely crosses the first main surface 112.

For example, in the example shown in FIG. 2, the first end of the X-direction dividing line 120 (that is, the first release line 132 a in the X direction) is in the vicinity of the first connection line 146 and is divided in the X direction. The second end of the work line 120 (that is, the second release line 132 b in the X direction) is in the vicinity of the second connection line 147. The first end of the Y-direction dividing line 125 (that is, the first release line 137a in the Y direction) is in the vicinity of the third connection line 148, and the second end of the Y-direction dividing line 125 ( That is, the second release line 137 b in the Y direction is in the vicinity of the fourth connection line 149.

Here, “the dividing line (or release line) is in the vicinity of the connecting line” means that the dividing line (or release line) closest to the connecting line on the extension line of the dividing line (or release line). It means that the tip of is at a distance within 5 mm (excluding 0 mm) and preferably within a distance of 3 mm (excluding 0 mm) from the connecting line.

When the first glass plate 100 having such characteristics is used, even if stress is applied to the first glass plate 100, particularly the

dividing lines

120 and 125, in the unintended stage, the

dividing lines

120 and 125 are It is possible to significantly suppress the first main surface 112 from completely traversing from one connection line to the other connection line.

As a result, the first glass plate 100 can significantly suppress the problem of the pre-splitting phenomenon that the first glass plate 100 is split at an unintended stage.

Therefore, in the first glass plate 100, it is possible to separate the glass article 160 from the first glass plate 100 in a necessary process (that is, a separation process), and scratches or cracks are generated on the end surface of the glass article 160. And it becomes possible to suppress significantly the problem that the quality of the glass article 160 will fall.

For example, even in the step of chemically strengthening the first glass plate 100 having the dividing

lines

120 and 125, the pre-cutting phenomenon can be suppressed.

(About the dividing lines 120 and 125)
Here, the

dividing lines

120 and 125 will be described in more detail.

The product line 130 in the X direction and the product line 135 in the Y direction are both formed by laser irradiation. That is, the product line 130 in the X direction and the product line 135 in the Y direction correspond to the laser modification region.

As will be described later, this laser modified region is configured by microscopically arranging a large number of surface voids at regular intervals or non-equal intervals. Therefore, the laser modified region is also referred to as “in-plane void region”.

Also, with respect to the depth direction, the laser modification region has a plurality of “internal modification rows” extending from the first main surface 112 to the second main surface 114. Each internal reforming row is composed of a plurality of voids arranged along the depth direction of the first main surface 112 (not necessarily perpendicular to the first main surface 112). Is done.

In contrast, the X-direction release line 132 and the Y-direction release line 137 are not necessarily formed by laser irradiation.

For example, the X-direction release line 132 and the Y-direction release line 137 may be formed by a machining process such as a glass cutter and a grindstone. However, when the X-direction release line 132 and the Y-direction release line 137 are formed by laser irradiation similar to the X-direction product line 130 and the Y-direction product line 135, one cutting line 120 at a time, Since 125 can be formed, it is possible to perform laser irradiation without waste and to reduce manufacturing costs.

It is preferable that the internal reforming row of the product line 130 in the X direction and / or the product line 135 in the Y direction extends from the first main surface 112 to the second main surface 114. In this case, it becomes easy to separate the glass article 160 from the first glass plate 100 in the separation and collection step.

On the other hand, the release line 132 in the X direction and / or the release line 137 in the Y direction do not necessarily have to extend from the first main surface 112 to the second main surface 114. For example, the release line 132 in the X direction and / or the release line 137 in the Y direction is terminated in the vicinity of the second main surface 114 and extends from the first main surface 112 to the vicinity of the second main surface 114. You may extend | stretch. By setting it as such a structure, it becomes possible to suppress a pre parting phenomenon more reliably.

In the above description, the characteristics of the first glass plate 100 have been described by taking as an example the case where the

dividing lines

120 and 125 are substantially straight lines. However, this is merely an example, and the

dividing lines

120 and 125 may be curved. Alternatively, the

dividing lines

120 and 125 may be configured by a combination of straight lines and curves.

Further, in the above description, the case where the outline of the glass article 160 has a substantially rectangular shape and one glass article 160 includes a plurality of (four)

product lines

130 and 135 has been described as an example. However, the outline of the glass article 160 does not necessarily have to be substantially rectangular. In addition, the number of product lines that form one glass article 160 is not particularly limited. For example, the product line may form a closed loop (see, for example, FIG. 4). In this case, the number of product lines forming one glass article 160 is one.

(Additional features)
Next, additional features of the first glass plate 100 other than those described above will be described.

In the above description, the case where the

dividing lines

120 and 125 are configured by a substantially continuous laser modification region has been described.

However, when the release lines 132 and 137 are configured by laser irradiation, at least one of the release lines 132 and 137 may have a “missing” portion of the laser modification region.

This configuration will be described with reference to FIG.

FIG. 3 schematically shows a partially enlarged view of a release line 132 (or release line 137, the same applies hereinafter) formed on the first main surface 112 of the first glass plate 100. FIG.

As described above, the release line 132 formed by laser irradiation corresponds to the laser modification region.

As shown in FIG. 3, the laser modified region 121 is configured by microscopically arranging a large number of surface voids 139 in a line at regular intervals or non-uniform intervals. However, adjacent surface voids 139 may be connected to each other to form a larger surface void. This may be repeated to form a substantially “linear” surface void.

In FIG. 3, the surface void 139 on the first main surface 112 is shown as a circle, but it should be noted that this is merely an example. The surface void 139 can take various forms such as a circle, an ellipse, and a rounded rectangle depending on laser irradiation and scanning conditions.

Here, the release line 132, that is, the laser modified region 121 has a missing portion 139d at a position where the surface void 139 should originally exist, and the surface void 139 does not exist in the missing portion 139d.

When such a missing portion 139d is intentionally present in the release line 132, the surface void 139 is formed by irradiating the missing portion 139d with a laser at a later necessary timing. Can be completed.

Therefore, in the first glass plate 100 in which the release line 132 having such a missing portion 139d is formed, it is possible to more reliably suppress the pre-cutting phenomenon during handling. Further, in the subsequent separation and collection step of the glass article 160, the glass article 160 can be easily separated and collected by irradiating the missing portion 139d with a laser.

(Another glass plate according to an embodiment of the present invention)
Next, with reference to FIG. 4, the structure of the another glass plate by one Embodiment of this invention is demonstrated.

FIG. 4 shows a schematic perspective view of another glass plate (hereinafter referred to as “second glass plate”) according to an embodiment of the present invention.

As shown in FIG. 4, the second glass plate 200 has a first main surface 212 and a second main surface 214. However, in FIG. 4, the second main surface 214 is not visible. The second glass plate 200 has four end faces 216, 217, 218, and 219 that connect the first main surface 212 and the second main surface 214.

The second glass plate 200 has a substantially rectangular shape when viewed from above. Accordingly, the first end surface 216 and the second end surface 217 are opposed to each other, and the third end surface 218 and the fourth end surface 219 are also opposed to each other.

As described above, the first main surface 212 and the first end surface 216 are connected by the first connection line 246, and the first main surface 212 and the second end surface 217 are connected by the second connection line 247. The first main surface 212 and the third end surface 218 are connected by a third connection line 248, and the first main surface 212 and the fourth end surface 219 are connected by a fourth connection line 249. The

Referring to FIG. 4 again, the second glass plate 200 has a plurality of dividing lines 220 on the first main surface 212. The dividing line 220 includes a product line 230, a release line 232 extending in the X direction, and a release line 237 extending in the Y direction.

In FIG. 4, the product line 230 has a substantially rectangular shape with rounded corners, and a total of eight glass articles 260 of 2 × 4 in total are separated from the second glass plate 200. be able to. However, this is merely an example, and it should be noted that the form of the product line 230, the number of glass articles 260 that can be separated, and the like are not particularly limited.

In the example illustrated in FIG. 4, the release line 232 in the X direction includes a first release line 232 a (four in total) that is not connected to the product line 230 at one end and a second release line that connects each product line 230. Release lines 232b (6 in total). The first release line 232a has one end connected to the product line 230 and the other end connected to the

corresponding connection line

246 or 247.

In addition, the release line 237 in the Y direction includes a first release line 237a (a total of 8), one end of which is not connected to the product line 230, and a second release line 237b (a total of 4) that connects the product lines 230 to each other. Book). The first release line 237a has one end connected to the product line 230 and the other end connected to the

corresponding connection line

248 or 249.

Here, the second glass plate 200 has the features (II) and (i) shown in the above-mentioned column “About Configuration and Features of One Embodiment of the Present Invention”.

That is, in the second glass plate 200, the first end line of the first release line 232 a in the X direction is connected to the first connection line 246 or the second connection line 247 on the first main surface 212. ing. The first release line 237a in the Y direction has a first end connected to the third connection line 248 or the fourth connection line 249.

However, the second end of the first release line 232a in the X direction is connected to the product line 230 so that further extension is prevented by the product line 230. Similarly, the first release line 237a in the Y direction is connected to the product line 230 at the second end so that the product line 230 prevents further stretching.

Here, “the further extension of the release line is prevented” means that when an imaginary extrapolation line of the first release line is drawn at the intersection of the first release line and the product line, in the vicinity of the intersection , Which means that the extrapolated line does not substantially match the product line.

For example, in the example of the dividing line 80 shown in FIG. 5, when a virtual extrapolation line L is drawn from the intersection P with the product line 84 with respect to the release line 82 having one end connected to the connection line 70. At least in the vicinity of the intersection P, the extrapolation line L substantially coincides with the product line 84. For this reason, in the form of such a dividing line 80, it cannot be said that the product line 84 "prevents further stretching of the release line 82".

On the other hand, in the example of the dividing line 80 shown in FIG. 6, when a virtual extrapolation line L is drawn from the intersection P with the product line 84 with respect to the release line 82 having one end connected to the connection line 70. In the vicinity of the intersection point P, the extrapolation line L does not substantially coincide with the product line 84. For this reason, in such a form of the dividing line 80, it can be said that the product line 84 "prevents further extension of the release line 82".

Referring to FIG. 4 again, in the second glass plate 200, the first release lines 232a in the X directions are arranged such that further stretching is prevented by the product line 230 interposed therebetween.

In this case, even if the first release line 232a in the X direction, the product line 230 (the X component thereof), and the second release line 232b in the X direction are combined, this separates from one connection line (for example, 246). The “continuous line segment” penetrating to the connection line (for example, 247) is not formed.

Similarly in the Y direction, the release line 237 in each Y direction is arranged so that further stretching is prevented by the product line 230 interposed therebetween.

In this case, even if the first release line 237a in the Y direction, the product line 230 (Y component thereof), and the second release line 237b in the Y direction are combined, this makes it possible to separate from one connection line (for example, 248). The “continuous line segment” penetrating to the connection line (for example, 249) is not formed.

Therefore, in the second glass plate 200, even if stress is applied to the dividing line of the second glass plate 200, the dividing line is completely formed from one connection line to the other connection line on the first main surface 212. Can be significantly suppressed.

As a result, the second glass plate 200 can significantly suppress the problem of the pre-splitting phenomenon that the second glass plate 200 is split at an unintended stage.

Therefore, in the second glass plate 200, it is possible to separate the glass article 260 from the second glass plate 200 in a necessary process (that is, a separation process), and scratches or cracks are generated on the end surface of the glass article 260. And it becomes possible to suppress significantly the problem that the quality of the glass article 260 will fall.

For example, even in the step of chemically strengthening the second glass plate 200 having the dividing line 220, the pre-cutting phenomenon can be suppressed.

In addition, the aspect of the dividing line 220 for obtaining such an effect is not limited to the arrangement shown in FIG. For example, the dividing line may have an aspect as shown in FIGS. 7 to 9 below.

For example, in the example shown in FIG. 7, the dividing line 220-1 includes a product line 230-1, a release line 232-1 extending in the X direction, and a release line 237-1 extending in the Y direction. .

The product line 230-1 is arranged so that the adjacent product line and one side are in contact with each other. Therefore, the release line 232-1 extending in the X direction has one end connected to the

connection line

246 or 247 and the other end connected to the product line 230-1. That is, in this example, there is no second release line 232b as shown in FIG.

Similarly, one of the release lines 237-1 extending in the Y direction is connected to the

connection line

248 or 249, and the other end is connected to the product line 230-1. That is, in this example, there is no second release line 237b as shown in FIG.

Next, in the example shown in FIG. 8, as in FIG. 7, the dividing line 220-2 includes a product line 230-2, a release line 232-2 extending in the X direction, and a release line extending in the Y direction. 237-2.

However, unlike the case of FIG. 7, the product lines 230-2 adjacent in the X direction have different height levels (zigzag height arrangement). Therefore, all the release lines 232-2 extending in the X direction have substantially the same length, but the release line 237-2 extending in the Y direction is longer than the adjacent release line 237-2. Are different.

In the example shown in FIG. 9, as in FIG. 7, the dividing line 220-3 includes the product line 230-3, the release line 232-3 extending substantially in the X direction, and the Y direction substantially. And a release line 237-3 extending in the direction.

However, unlike the case of FIG. 7, in this example, the release line 232-3 in the X direction and / or the release line 237-3 in the Y direction are configured by curves.

Thus, there are various arrangement forms of the dividing line 220.

Note that these examples are merely examples, and various configurations other than those shown are possible.

For example, in the dividing line 220 shown in FIG. 4, the X-direction release line 232 and / or the Y-direction release line 237 may be configured by a curve. Similarly, in the dividing line 220-2 shown in FIG. 8, the release line 232-2 in the X direction and / or the release line 237-2 in the Y direction may be configured by a curve.

Further, as described in the configuration of the first glass plate 100, the first release lines 232a (FIG. 4), 232-1 (FIG. 7), 232-2 (FIG. 8), and 232-3 in the X direction are used. In FIG. 9, one end portion is not necessarily connected to the corresponding connection line, and may be terminated in the vicinity of the corresponding connection line.

Similarly, in the first release line 237a (FIG. 4), 237-1 (FIG. 7), 237-2 (FIG. 8), and 237-3 (FIG. 9) in the Y direction, one end is not necessarily It is not necessary to be connected to the corresponding connection line, and it may be terminated in the vicinity of the corresponding connection line.

Furthermore, in the release lines shown in FIGS. 4 to 9, at least one release line may have the “missing” portion as described above.

Furthermore, the

release lines

232a and 237a in FIG. 4, the release lines 232-1 and 237-1 in FIG. 7, and the release lines 232-2 and 237-2 in FIG. 8 are not at the corner of the product line and in the vicinity thereof. Connected to one side of the product line. In this case, the pre-splitting phenomenon may be relatively less likely to occur than when the release line is connected to the corner of the product line.

(Still another glass plate according to an embodiment of the present invention)
Next, with reference to FIG. 10, the structure of the further another glass plate by one Embodiment of this invention is demonstrated.

FIG. 10 shows a schematic perspective view of still another glass plate (hereinafter referred to as “third glass plate”) according to an embodiment of the present invention.

As shown in FIG. 10, the third glass plate 300 has a first main surface 312 and a second main surface 314. However, in FIG. 10, the second main surface 314 is not visible. The third glass plate 300 has four end faces 316, 317, 318, and 319 that connect the first main surface 312 and the second main surface 314.

The third glass plate 300 has a substantially rectangular shape in a top view. Therefore, the first end surface 316 and the second end surface 317 are opposed to each other, and the third end surface 318 and the fourth end surface 319 are also opposed to each other.

The first main surface 312 and the first end surface 316 are connected by a first connection line 346, the first main surface 312 and the second end surface 317 are connected by a second connection line 347, and the first The main surface 312 and the third end surface 318 are connected by a third connection line 348, and the first main surface 312 and the fourth end surface 319 are connected by a fourth connection line 349.

The third glass plate 300 has three dividing lines 320 extending along the longitudinal direction (X direction) and nine extending along the width direction (Y direction) on the first main surface 312. And a dividing line 325.

The piece portion surrounded by the dividing lines 320 and 325 corresponds to the glass article 360 that is separated and collected from the third glass plate 300 in the subsequent separation step. In the example shown in FIG. 10, a total of 16 substantially rectangular glass articles 360 can be separated and collected in the separation step.

Each X-direction dividing line 320 includes a first release line 332a in the X direction, a plurality of product lines 330 in the X direction, and a second release line 332b in the X direction. Similarly, each Y-direction dividing line 325 includes a first release line 337a in the Y direction, a plurality of product lines 335 in the Y direction, and a second release line 337b in the Y direction.

Here, the third glass plate 300 has the features (II) and (ii) shown in the above-mentioned column “About Configuration and Features of One Embodiment of the Present Invention”.

That is, in the third glass plate 300, the first end line of the first release line 332 a in the X direction is connected to the first connection line 346 on the first main surface 312. Further, the second end of the first release line 332 a in the X direction is not connected to the product line 330 so that further extension is prevented by the product line 330 in the X direction.

In other words, the first release line 332a in the X direction has the form as shown in FIG. 5 described above, that is, the extrapolated line extending from the second end of the first release line 332a in the X direction is X It is disposed on the first major surface 312 in a form that matches the directional product line 330.

Further, the X-direction dividing line 320 is composed of the X-direction first release line 332a, the plurality of X-direction product lines 330, and the X-direction second release line 332b as a whole. It can be said that it constitutes a continuous line segment along the stretchable direction of one release line 332a.

Further, the continuous component, that is, the dividing line 320 in the X direction does not cross from the first connection line 346 to the second connection line 347 on the first main surface 312.

Even in the third glass plate having such a configuration, the same effect as that of the first glass plate 100 and the second glass plate 200 described above, that is, stress is applied to the dividing lines 320 and 325 of the third glass plate 300. Even if added, it is possible to significantly suppress the dividing lines 320 and 325 from completely traversing from the one connection line to the other connection line on the first main surface 312.

As a result, the third glass plate 300 can significantly suppress the problem of the pre-splitting phenomenon that the third glass plate 300 is divided at an unintended stage.

For example, even in the step of chemically strengthening the third glass plate 300 having the dividing lines 320 and 325, the pre-cutting phenomenon can be suppressed.

As described above, in the third glass plate 300, the glass article 360 can be separated from the third glass plate 300 in a necessary process (that is, a separation process), and the end surface of the glass article 360 is scratched or cracked. Is generated, and the problem that the quality of the glass article 360 deteriorates can be significantly suppressed.

(Manufacturing method of the glass plate by one Embodiment of this invention)
Next, a method for manufacturing a glass plate according to an embodiment of the present invention will be described with reference to FIGS.

FIG. 11 schematically shows a flow of a glass plate manufacturing method (hereinafter referred to as “first manufacturing method”) according to an embodiment of the present invention.

As shown in FIG. 11, the first manufacturing method is:
(1) A step of preparing a glass material having a first main surface and a second main surface facing each other, wherein the glass material is connected to the first main surface and the second through a connecting line. Step having an end face connecting the main surfaces of (No. S110)
When,
(2) A step of forming a cutting line composed of a laser modified region on the first main surface by irradiating a laser on the first main surface side of the glass material (step S120).
When,
Have

Hereinafter, each process will be described in detail.

(Step S110)
First, a glass material is prepared. A glass material has the 1st main surface and the 2nd main surface, and the end surface which connects both.

The glass composition of the glass material is not particularly limited. The glass material may be, for example, soda lime glass, alkali aluminosilicate glass, or alkali aluminosilicate glass.

The thickness of the glass material is not particularly limited, but may be in the range of 0.03 mm to 6 mm, for example. In the case of a glass material for building materials or vehicles, the range may be, for example, 2 mm to 19 mm.

The glass material may be provided in a plate shape or a roll shape. When a roll-shaped glass material is used, conveyance becomes easier as compared with a plate-shaped material. In the case of a plate-shaped glass material, the first and second main surfaces are not necessarily flat and may be curved.

When the glass material is provided in a plate shape, the shape of the glass material is not particularly limited. The glass material may be, for example, a substantially rectangular shape, a substantially circular shape, or a substantially elliptical shape. In the following description, as an example, it is assumed that the glass material has a rectangular shape.

FIG. 12 shows a schematic perspective view of such a rectangular glass material.

As shown in FIG. 12, the glass material 910 has a first main surface 912, a second main surface 914, and four end surfaces 916 to 919.

The end faces 916 to 919 and the first main surface 912 are joined via connection lines. More specifically, the first main surface 912 and the first end surface 916 are joined via the first connection line 946, and the first main surface 912 and the second end surface 917 are the second The first main surface 912 and the third end face 918 are joined via the third connection line 948, and the first main surface 912 and the fourth end face 919 are joined to each other. Are joined via a fourth connection line 949.

(Step S120)
Next, the glass material 910 is irradiated with a laser. Thereby, a dividing line is formed on the first main surface 912 of the glass material 910.

FIG. 13 schematically shows an example of a dividing line 920 formed in the glass material 910 and extending in the X direction.

As shown in FIG. 13, the X-direction dividing line 920 includes a laser modified region 921. The laser modified region 921 is configured by arranging a large number of surface voids 939 in a line.

In the example shown in FIG. 13, the surface voids 939 in the laser modified region 921 are arranged at equal intervals of the pitch P. The pitch P may be in the range of 2 μm to 10 μm, for example. However, this is merely an example, and the surface voids 939 may be arranged at unequal intervals.

Further, as described above, each surface void 939 does not necessarily have a circular shape as shown in FIG. The shape of the surface void 939 can take various forms depending on laser irradiation and scanning conditions.

Regarding the depth direction (Z direction) of the glass material 910, the dividing line 920 extends from the first main surface 912 toward the second main surface 914. More specifically, a plurality of internal modification rows 950 extending along the depth direction are formed below each surface void 939 constituting the laser modification region 921 on the first main surface 912. The Each internal reforming row 950 includes a plurality of voids 958 arranged in the depth direction.

Like the surface void 939, the void 958 does not necessarily have a circular shape as shown in FIG. Depending on laser irradiation, scanning conditions, and the like, the shape of the void 958 can take various forms.

However, typically, the dimension of the void 958 constituting the internal reforming row 950 in the direction along the internal reforming row 950 is in the range of 0.1 μm to 1000 μm, and preferably 0.5 μm to 100 μm. More preferably, it is in the range of 0.5 μm to 50 μm. The shape of the void 958 constituting the internal reforming row 950 is a rectangle, a circle, an ellipse, or the like. Further, in one internal reforming row 950, the partition wall thickness between adjacent voids 958 is usually in the range of 0.1 μm to 10 μm.

As a laser capable of forming such a dividing line 920, for example, a pulse width of femtosecond order to nanosecond order, that is, a short of 1.0 × 10 ⁻¹⁵ to 9.9 × 10 ⁻⁹ seconds. A pulse laser may be mentioned. Such a short pulse laser beam is preferably a burst pulse in that the internal voids are efficiently formed. Moreover, the average output in the irradiation time of such a short pulse laser is 30 W or more, for example. If this average output of the short pulse laser is less than 10 W, sufficient voids may not be formed. As an example of a laser beam of burst pulse, one internal modified array is formed by a burst laser having 3 to 10 pulses, the laser output is about 90% of the rated (50 W), the burst frequency is about 60 kHz, The time width is 20 picoseconds to 165 nanoseconds. A preferable range of the burst time width is 10 nanoseconds to 100 nanoseconds.

Also, as a laser irradiation method, a method using a self-convergence of a beam based on the Kerr effect (Kerr-Effect), a method using a Gaussian Bessel beam together with an axicon lens, and a line focus forming beam using an aberration lens are used. There are methods. In any case, the laser irradiation conditions are not particularly limited as long as the dividing line 920 can be formed.

For example, when a burst laser device (Patent Document 2) is used, the size and number of surface voids 939 in the in-plane direction and voids 958 in the depth direction are controlled to some extent by appropriately changing the laser irradiation conditions. be able to.

FIG. 14 schematically shows an example of the form of the dividing line formed on the glass material 910.

As shown in FIG. 14, a part of the dividing line 920 in the X direction corresponds to the product line 930 in the X direction, and the remaining part of the dividing line 920 in the X direction corresponds to the release line 932 in the X direction. To do.

Further, a part of the dividing line 925 in the Y direction corresponds to the product line 935 in the Y direction, and the remaining part of the dividing line 925 in the Y direction corresponds to the release line 937 in the Y direction.

Here, as described above, in the glass material 910, none of the dividing lines 920 in the X direction extends from the first connection line 946 to the second connection line 947. Similarly, none of the dividing lines 925 in the Y direction extends from the third connection line 948 to the fourth connection line 949.

Therefore, in the glass material 910 having such a

dividing line

920, 925, even if stress is applied to the glass material 910 in an unintended stage, the

dividing line

920, 925 is one of the first main surfaces 912. It is possible to significantly suppress the complete traversal from the connection line to the other connection line.

Such a process can provide a glass plate in which the pre-cutting phenomenon is unlikely to occur in the first manufacturing method.

Here, as described above, at least one of the release lines 932 and 937 formed in the step (2) may have a missing portion in which the laser modified region does not exist in the entire length range.

In addition, at least one of the release lines 932 and 937 may not penetrate to the second main surface 914 of the glass material 910.

(Additional process)
For example, the first glass plate 100 as shown in FIG. 2 can be manufactured by the first manufacturing method shown in FIG. Alternatively, by changing the form of the

dividing lines

920 and 925, for example, the glass plates shown in FIGS. 4, 7 to 9, and 10 can be manufactured.

Here, the first manufacturing method may further include an additional process as described below after step S120.

(Chemical strengthening process)
In the chemical strengthening step, the glass plate manufactured by the first manufacturing method (hereinafter, referred to as “dividing line-containing glass plate”) is chemically strengthened, thereby increasing the strength of the dividing line-containing glass plate. Can do.

Usually, the chemical strengthening treatment is performed by immersing the glass to be treated in a molten salt containing an alkali metal. The temperature of the molten salt is, for example, about 430 ° C. to 500 ° C., and the glass is exposed to a high temperature during the chemical strengthening treatment.

Here, the dividing line-containing glass plate has the above-described characteristics. For this reason, even if the cutting line containing glass plate is exposed to the high temperature by a chemical strengthening process, generation | occurrence | production of the pre-cutting phenomenon can be suppressed significantly.

(Film formation process)
In the film forming step, various functional films are formed on the main surface of the dividing line-containing glass plate.

The film forming step may include a step of forming various functional films by, for example, a coating method, an immersion method, a vapor deposition method, a sputtering method, a PVD method, or a CVD method.

In such a film forming process, the glass to be formed may be held at a high temperature or stress may be applied.

However, the dividing line-containing glass plate has the characteristics as described above. For this reason, even if the dividing line-containing glass plate is exposed to a high temperature or stress is applied in the film forming process, the occurrence of the pre-splitting phenomenon can be significantly suppressed.

(Surface treatment process)
In the surface treatment step, various functions are imparted to the main surface of the dividing line-containing glass plate.

Examples of the surface treatment method include an etching treatment and a printing treatment. The film formation process described above is also a kind of surface treatment process.

By surface treatment, for example, a wavelength selective film such as a low reflection film, a high reflection film, an IR absorption film or a UV absorption film, an anti-glare film, an anti-fingerprint film, an anti-fogging film, printing, an electronic circuit, and a multilayer structure film thereof. May be formed.

Furthermore, a groove may be formed on at least one main surface of the glass material 910 before and after step S120, that is, before and after the formation of the laser modified region.

For example, when a laser modified region is already formed on the first main surface 912 of the glass material 910, a groove may be formed along the laser modified region. Alternatively, when the laser modified region is not yet formed on the first main surface 912 of the glass material 910, a groove may be formed along the laser modified region to be formed in the future.

The shape of the groove is not particularly limited. For example, the groove may have a substantially V-shaped cross-section, a substantially U-shaped cross-section, a substantially inverted trapezoidal shape, a substantially concave shape, or the like. Moreover, in the form of these grooves, the opening portion of the first main surface 912 or the second main surface 914 of the groove may be round.

When the groove having such a cross-sectional shape is formed, when the glass article is separated and collected from the glass plate in a later step, the glass article is connected to the first and / or second main surface of the end face. Will be chamfered or rounded. For this reason, the post-processing process with respect to a glass article can be skipped.

The depth of the groove is, for example, less than ½ of the thickness of the glass material 910. The depth of the groove is preferably 0.01 mm or more.

The groove forming means may be, for example, a grindstone or a laser. In particular, from the viewpoint of the accuracy and quality of the groove, machining with a laser is preferable.

In addition, the dividing line-containing glass plate can be subjected to various processes such as a conveying process and a cleaning process.

(Separation process)
In the separation step, the glass article is separated and collected from the dividing line-containing glass plate.

As described above, in the cutting line-containing glass plate, the pre-cutting phenomenon is unlikely to occur in various processes such as the transport process, the chemical strengthening process, the film forming process, and the cleaning process. For this reason, in the dividing line containing glass plate, a glass article can be appropriately collected at the timing of the separation step.

(Another manufacturing method of a glass plate according to an embodiment of the present invention)
Next, another method for manufacturing a glass plate according to an embodiment of the present invention will be described with reference to FIG.

FIG. 15 schematically shows a flow of another glass plate manufacturing method (hereinafter referred to as “second manufacturing method”) according to an embodiment of the present invention.

As shown in FIG. 15, the second manufacturing method is:
(1) A step of preparing a glass material having a first main surface and a second main surface facing each other, wherein the glass material is connected to the first main surface and the second through a connecting line. A step (step S210) having an end face connecting the main surfaces of
(2) forming a product line composed of a laser modified region on the first main surface by irradiating a laser on the first main surface side of the glass material (step S220); ,
(3) forming a release line on the first or second main surface of the glass material (step S230);
Have

Here, step S210 in the second manufacturing method is the same as step S110 in the first manufacturing method described above. Therefore, here, step S220 and step S230 will be described.

(Step S220)
In step S220, the glass material prepared in step S210 is irradiated with a laser. Thereby, a product line is formed on the first main surface of the glass material.

For the form and configuration of the product line, the description relating to the cutting line and the product line in the first manufacturing method described above is referred to.

(Step S230)
After step S220, a release line is formed on the first main surface of the glass material. The release line extends from the first main surface to the second main surface. Alternatively, the release line may be formed on the second main surface of the glass material and extended from the second main surface to the first main surface.

The means for forming the release line is not particularly limited. The release line may be formed by a machining process such as a glass cutter.

Thereby, for example, it is possible to obtain a glass material on which a dividing line as shown in FIG. 14 is formed, that is, a glass plate.

Here, also in the second manufacturing method, the release line is formed to satisfy any of the following:
(I) On the first main surface of the glass material, none of the release lines is connected to the connection line; or (II) On the first main surface of the glass material, the first line of the first release line When one end is connected to the first connection line,
(I) the first release line has a second end connected to the product line such that further stretching is prevented by the product line, or (ii) the first release line in a form other than (i) above The second end of the first release line is connected to the product line, the first release line, the one or more product lines, and the one or more other release lines, as a whole, of the first release line A continuous line segment is formed along a stretchable direction, and the continuous line segment does not cross from the first connection line to another connection line on the first main surface of the glass material.

Therefore, in the glass plate manufactured by the second manufacturing method, even if stress is applied to the glass plate in an unintended stage, the dividing line is completely formed from one connection line to the other connection line on one surface. Can be significantly suppressed.

As a result, the second manufacturing method can provide a glass plate that is less prone to pre-cutting.

(Another manufacturing method of a glass plate according to an embodiment of the present invention)
Next, with reference to FIG. 16, another manufacturing method of the glass plate by one Embodiment of this invention is demonstrated.

FIG. 16 schematically shows a flow of still another method for manufacturing a glass plate according to an embodiment of the present invention (hereinafter referred to as “third manufacturing method”).

As shown in FIG. 16, the third manufacturing method is
(1) A step of preparing a glass material having a first main surface and a second main surface facing each other, wherein the glass material is connected to the first main surface and the second through a connecting line. A step (step S310) having an end face connecting the main surfaces of
(2) forming a release line on the first or second main surface of the glass material (step S320);
(3) forming a product line composed of a laser modified region on the first main surface by irradiating a laser on the first main surface side of the glass material (step S330); ,
Have

Here, in the third manufacturing method, the order of the release line forming step (step S320) and the product line forming step (step S330) is reversed compared to the second manufacturing method described above. However, Step S310, Step S320, and Step S330 are the same as Step S210, Step S230, and Step S220 in the second manufacturing method, respectively.

Therefore, it will be apparent that a glass plate that is less prone to pre-splitting can be provided even in the third manufacturing method.

In yet another method of manufacturing a glass plate for suppressing the pre-splitting phenomenon, as one step after the step (step S110) of preparing the glass base plate of FIG. Or may be formed alternately.

This application claims priority based on Japanese Patent Application No. 2015-239734 filed on Dec. 8, 2015, the entire contents of which are incorporated herein by reference.

DESCRIPTION OF SYMBOLS 1 Conventional glass plate 12 1st main surface 14 2nd main surface 16 1st end surface 17 2nd end surface 18 3rd end surface 19 4th end surface 20 X-direction dividing line 25 Y-direction dividing Line 30 Product line in X direction 32 Release line in X direction 35 Product line in Y direction 37 Release line in Y direction 60 Glass article 70 Connection line 80 Line for cutting 82 Release line 84 Product line 100 First glass plate 112 First Main surface 114 second main surface 116 first end face 117 second end face 118 third end face 119 fourth end face 120 X-direction dividing line 121 laser modified region 125 Y-direction dividing line 130 X Product line in direction 132 Release line in X direction 132a First Lily in X direction Line 132b First release line in the X direction 135 Product line in the Y direction 137 Release line in the Y direction 137a First release line in the Y direction 137b First release line in the Y direction 139 Surface void 139d Missing portion 146 First Connection line 147 Second connection line 148 Third connection line 149 Fourth connection line 160 Glass article 200 Second glass plate 212 First main surface 214 Second main surface 216 First end surface 217 Second End face 218 Third end face 219 Fourth end face 220 Dividing line 220-1 to 220-3 Dividing line 230 Product line 230-1 to 230-3 Product line 232 X direction release line 232a X direction first line Release line 232b Second release line 232-1 in the X direction 32-3 Release line in X direction 237 Release line in Y direction 237a First release line in Y direction 237b Second release lines in Y direction 237-1 to 237-3 Release line in Y direction 246 First connection line 247 Second connection line 248 Third connection line 249 Fourth connection line 260 Glass article 300 Third glass plate 312 First main surface 314 Second main surface 316 First end surface 317 Second end surface 318 Third end face 319 Fourth end face 320 X-direction dividing line 325 Y-direction dividing line 330 X-direction product line 332a X-direction first release line 332b X-direction second release line 335 Y-direction Product line 337a First release line in Y direction 337b Second release in Y direction IN 346 First connection line 347 Second connection line 348 Third connection line 349 Fourth connection line 360 Glass article 910 Glass material 912 First main surface 914 Second main surface 916 First end surface 917 First End face 918 third end face 919 fourth end face 920 cutting line in X direction 921 laser modified region 925 cutting line in Y direction 930 product line in X direction 932 release line in X direction 935 product line in Y direction 937 Release line in Y direction 939 Surface void 946 First connection line 947 Second connection line 948 Third connection line 949 Fourth connection line 950 Internal reforming row 958 Void

Claims

A glass plate,
A first main surface and a second main surface facing each other;
An end face connecting the first main surface and the second main surface;
Have
A plurality of dividing lines are formed on the first main surface,
The dividing line includes one or more product lines and one or more release lines, and the product line corresponds to a contour line of a glass article separated and collected from the glass plate, and the release line Corresponds to the part other than the product line in the dividing line,
The dividing line extends in the depth direction from the first main surface toward the second main surface,
When the boundary between the first main surface and the end face and the boundary between the second main surface and the end face are referred to as connection lines,
(I) On the first main surface, none of the release lines is connected to the connection line, or (II) on the first main surface, the first of the first release lines If the end is connected to the first connection line,
(I) the first release line has a second end connected to the product line such that further stretching is prevented by the product line; or (ii) in any form other than (i), When the second end of one release line is connected to the product line, the first release line, one or more of the product lines, and one or more of the other release lines are As a continuous line segment along the stretchable direction of the first release line, the continuous line segment is different from the first connection line on the first main surface of the glass plate. A glass plate that does not cross the connection line.
The glass plate according to claim 1, wherein the release line has a curved portion or is substantially constituted by a straight line.
The glass plate according to claim 1 or 2, wherein the product line is configured by a laser modification region.
The laser modified region has a surface void on the first main surface;
Furthermore, the said laser modification area | region is a glass plate of Claim 3 which has a void along the depth direction from the said 1st main surface.
The glass plate according to any one of claims 1 to 4, wherein at least one of the release lines includes a laser modification region.
The glass plate according to claim 5, wherein the release line constituted by the laser modified region has a missing portion where no surface void exists in the entire length range on the first main surface.
The glass plate according to any one of claims 1 to 6, wherein the release line includes a laser modification region.
The glass plate according to any one of claims 1 to 7, wherein at least one of the release lines does not penetrate to the second main surface.
The outlines of two adjacent glass articles do not overlap each other,
The glass plate according to any one of claims 1 to 8, wherein there is at least one release line between the outlines of two adjacent glass articles.
The glass plate according to any one of claims 1 to 8, wherein a part of the outline of two adjacent glass articles overlaps each other.
A method of manufacturing a glass plate,
(1) A step of preparing a glass material having a first main surface and a second main surface facing each other, wherein the glass material connects the first main surface and the second main surface. A step having an end face;
(2) forming a cutting line composed of a laser modified region on the first main surface by irradiating a laser on the first main surface side of the glass material;
Have
The dividing line includes one or more product lines and one or more release lines, and the product line corresponds to a contour line of a glass article separated and collected from the glass material, and the release line Corresponds to the part other than the product line in the dividing line,
The dividing line extends in the depth direction from the first main surface toward the second main surface,
When the boundary between the first main surface and the end face and the boundary between the second main surface and the end face are referred to as connection lines,
(I) On the first main surface, none of the release lines is connected to the connection line, or (II) on the first main surface, the first of the first release lines If the end is connected to the first connection line,
(I) the first release line has a second end connected to the product line such that further stretching is prevented by the product line; or (ii) in any form other than (i), When the second end of one release line is connected to the product line, the first release line, one or more of the product lines, and one or more of the other release lines are As a continuous line segment along the stretchable direction of the first release line, the continuous line segment is different from the first connection line on the first main surface of the glass plate. A manufacturing method that does not cross the connection line.
The laser modified region has a surface void on the first main surface;
In the step (2), at least one of the release lines is formed in the first main surface so as to have a missing portion where the surface void does not exist within a full length range. The manufacturing method as described.
The manufacturing method according to claim 11 or 12, wherein in the step (2), at least one of the release lines is formed so as not to penetrate to the second main surface.
Furthermore, after the step (2),
The manufacturing method according to claim 11, further comprising a step of separating and collecting one or more glass articles from the glass material.
A method of manufacturing a glass plate,
(1) A step of preparing a glass material having a first main surface and a second main surface facing each other, wherein the glass material connects the first main surface and the second main surface. A step having an end face;
(2) forming a product line composed of a laser modified region on the first main surface by irradiating a laser on the first main surface side of the glass material;
(3) forming a release line on the first or second main surface of the glass material before the step (2) or after the step (2);
Have
The product line corresponds to a contour line of a glass article separated and collected from the glass material, and the release line corresponds to a part other than the product line,
The product line extends in the depth direction from the first main surface toward the second main surface, and the release line extends from the first main surface toward the second main surface. Or extending in the depth direction from the second main surface toward the first main surface,
When the boundary between the first main surface and the end face and the boundary between the second main surface and the end face are referred to as connection lines,
(I) On the first main surface, none of the release lines is connected to the connection line, or (II) on the first main surface, the first of the first release lines If the end is connected to the first connection line,
(I) the first release line has a second end connected to the product line such that further stretching is prevented by the product line; or (ii) in any form other than (i), When the second end of one release line is connected to the product line, the first release line, one or more of the product lines, and one or more of the other release lines are As a continuous line segment along the stretchable direction of the first release line, the continuous line segment is different from the first connection line on the first main surface of the glass plate. A manufacturing method that does not cross the connection line.
Furthermore, after the step (3),
The manufacturing method according to claim 15, further comprising a step of separating and collecting one or more glass articles from the glass material.
The manufacturing method according to any one of claims 11 to 16, wherein the release line has a curved portion or is substantially constituted by a straight line.
The outlines of two adjacent glass articles do not overlap each other,
The manufacturing method according to claim 11, wherein at least one release line exists between the contour lines of two adjacent glass articles.
The manufacturing method according to any one of claims 11 to 18, wherein a part of the outline of two adjacent glass articles overlaps each other.