JP2015063415A - Glass film, glass film laminate, and method of cutting glass film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure an effective surface area of a glass film to a mating surface area of a support glass plate as large as possible, and to provide a method of easily manufacturing a glass film suitable for achieving the above object.SOLUTION: In a glass film laminate G, which is formed by laminating a glass film 1 of a thickness of 300 μm or less and a support glass plate 2 supporting the glass film 1 and having an approximately rectangular peripheral outline with four corners being cut off, the glass film 1 has an approximately rectangular peripheral outline with four corners being cut off, so that the peripheral outline of the glass film 1 extends so as to follow the peripheral outline of the support glass plate 2.

Description

  The present invention relates to a glass film having a thickness of 300 μm or less, a glass film laminate in which a glass film and a supporting glass plate supporting the glass film are laminated, and a method for cutting the glass film.

  As is well known, a glass film laminate is formed by laminating a thin rectangular glass film (for example, a plate thickness of 200 μm) and a rectangular support glass plate that supports the glass film. . In addition, a normal glass film is laminated | stacked so that the outer periphery outline may not protrude from a support glass plate.

  As a structural example of this glass film laminated body, about each of a glass film and a support glass plate, surface roughness Ra of the mating surface used as the surface of the mutually opposing side shall be 2.0 nm or less, and both mating surfaces are made directly. And the like (see Patent Document 1), and those in which a resin layer is interposed between both mating surfaces and a glass film and a supporting glass plate are laminated (see Patent Document 2). .

  According to this glass film laminated body, by laminating with the supporting glass plate, the glass film easily bends easily, and the both glasses are brought into close contact with each other and behave as one. For this reason, handling of the glass film in the manufacturing process of a glass product becomes very simple. Furthermore, it is possible to easily peel the glass film and the supporting glass plate at a desired timing.

JP2012-030404A JP 2007-326358 A

  By the way, the glass film laminated body which consists of glass which is a brittle material has a very brittle property with respect to an impact. Therefore, for example, when the glass film laminate is transported by a belt conveyor or the like in a glass product production line, when the corners of the four corners of the supporting glass plate come into contact with jigs or the like installed around the transport path Are likely to be chipped or cracked in the supporting glass plate.

  Therefore, in view of the necessity of taking measures against such a problem, the shape of the supporting glass plate for supporting the glass film is shown in FIG. 13 (a) instead of the conventionally used rectangular supporting glass plate. Such a substantially rectangular support glass plate 2 having four corners cut may be adopted as the support glass plate of the glass film laminate G.

  According to the support glass plate 2 having such a shape, by providing the corner cut portions 2b at the four corners, even if the support glass plate 2 is in contact with a jig or the like during conveyance, chipping, cracking, etc. Can be suitably avoided. However, even when this supporting glass plate 2 is employed in the glass film laminate G, the following problems to be solved still remain.

  That is, as shown in FIG. 13 (a), as the support glass plate 2 is provided with the corner cut portion 2b, the area of the mating surface 2a of the support glass plate 2 facing the glass film 1 is a corner cut. The outline is changed while being reduced by the amount. And as mentioned above, the glass film 1 is laminated | stacked so that the outer periphery outline may not protrude from the support glass plate 2. FIG.

  Therefore, when the rectangular glass film 1 is laminated on the corner-cut support glass plate 2, the outer peripheral contour of the glass film 1 is different from the case of lamination on the rectangular support glass plate 2. It becomes impossible to laminate the glass film 1 over the entire surface of the mating surface 2a or substantially the entire surface so as to extend along the outer peripheral contour of the.

  For this reason, a transparent electrode is formed with respect to the area of the mating surface 2a in the support glass plate 2 in the case where a transparent electrode is formed on the glass film 1 for a liquid crystal panel using the glass film laminate G, for example. There is a problem that the area of the effective surface 1a in the glass film 1 that can be used cannot be sufficiently secured.

  Moreover, as a case where the support glass plate is subjected to corner cutting, as shown in FIG. 13B, for the purpose of determining the orientation of the glass film laminate G in the process, among the four corners of the support glass plate 2 In some cases, an orientation flat OF2 is provided by cutting one corner.

  Also in such a case, with the provision of the orientation flat OF2, the area of the mating surface 2a of the supporting glass plate 2 is reduced and the contour shape is changed. Therefore, it is difficult to sufficiently secure the area of the effective surface 1a of the glass film 1 as in the case where the four corners of the support glass plate 2 are corner-cut.

  In addition, such a problem is not only when the corner of the support glass plate or one of the four corners is cut as described above, but also when using the glass film laminate, the four corners of the support glass plate. Of these, when at least one corner is cut, it is a problem that accompanies as well.

  The present invention made in view of the above circumstances is to secure an area of the effective surface of the glass film as large as possible with respect to the area of the mating surface in the supporting glass plate, and a glass film suitable for achieving this object. It is a technical problem to provide a method for simple production.

  The present invention, which was created to solve the above problems, has a glass film having a thickness of 300 μm or less, and a support having a substantially rectangular outer periphery that supports the glass film and at least one of the four corners is corner-cut. In the glass film laminate in which a glass plate is laminated, the glass film has a substantially rectangular outer peripheral contour in which the same part as the support glass plate is cut out of the four corners, and the outer peripheral contour of the glass film is It is characterized by extending along the outer peripheral contour of the support glass plate.

  According to such a configuration, since both the glass film and the supporting glass plate have a substantially rectangular outer peripheral contour in which the same portion of the four corners is corner-cut, the outer peripheral contours of both glasses are as close as possible. Or it can be set as the glass film laminated body in the state in which it corresponded. As a result, the area of the effective surface of the glass film can be ensured as large as possible with respect to the area of the mating surface in the support glass plate.

  Said structure WHEREIN: About each of the said glass film and the said support glass plate, all four corners may be corner-cut.

  In this way, all four corners of the support glass plate are corner-cut, for example, when the support glass plate comes into contact with a jig or the like during the transport of the glass film laminate. However, it is possible to suitably avoid the occurrence of chipping or cracking.

  Said structure WHEREIN: About each of the said glass film and the said support glass plate, it is preferable that the corner cut part which exists in the same one place of four corners is made into orientation flat.

  In this way, by providing the orientation flat, for example, when a transparent electrode is formed on a glass film for a liquid crystal panel using a glass film laminate, the direction in which the electrode should be formed is determined. It is possible to accurately avoid the occurrence of an erroneous situation.

  In addition, the present invention, which was created to solve the above problems, comprises a glass cut having a thickness of 300 μm or less, a corner cut part existing in at least one of the four corners, and a side part connected to the corner cut part. In the method of cutting out a substantially rectangular product part, for each of the corner cut part and the side part, for each, formation of a scribe line for the glass film, and folding of the glass film along the scribe line, It is characterized by cutting out by executing.

  According to such a method, in order to cut out all of the corner cut portion and the side portion by forming a scribe line on the glass film and performing a split along the scribe line, the product portion is cut out from the glass film. Can be executed simply and at high speed. Thereby, it becomes possible to manufacture a product part with favorable manufacturing efficiency. And when this product part is laminated | stacked on the support glass plate by which the same location was cut in the four corners, the area of an effective surface can be ensured as much as possible.

  In the above method, it is preferable that the scribe line for cutting out the corner cut portion is formed deeper in the plate thickness direction than the scribe line for cutting out each of the side portions.

  If it does in this way, according to the difference in the depth of a scribe line, it becomes possible to perform the split for cutting out a corner cut part with a bending stress smaller than the split for cutting out each of the sides. . Due to this, it becomes easier to avoid the occurrence of uncut portions in the corner cut portion as compared with the side portion.

  In the above method, it is preferable that the splitting for cutting out each of the side portions is performed after the splitting for cutting out the corner cut portion connected to each side portion.

  When splitting to cut out each side (hereinafter referred to as side-cutting) is executed before splitting to cut out corner-cutting parts connected to each side (hereinafter referred to as corner-cut splitting) The following problems may occur. That is, when executing the corner cut splitting, the area of the part removed from the glass film by the execution of the corner cut splitting is reduced by the amount of the side split split executed first. Due to this, bending stress does not act suitably around the scribe line, and it is generally difficult to perform corner cut splitting, and the corner cut portion is likely to be cut off. However, when the edge splitting is performed after the corner cut splitting, the area of the part to be removed from the glass film at the time of corner cut splitting is sufficiently secured. This can be avoided suitably.

  In the above method, it is preferable that the corner cut portion has an inclination angle of 20 ° or more with respect to the side portion connected to the corner cut portion.

  The smaller the angle at which the corner cut portion is inclined with respect to the side portion connected to the corner cut portion, the more effective the bending stress acting on the glass film when corner cut splitting is performed in the vicinity of the end portion of the scribe line. No longer acts on the corner cut, and the corner cut portion tends to be uncut. However, if the corner cut part has an inclination angle of 20 ° or more with respect to the side part connected to the corner cut part, it is possible to preferably avoid such a problem.

  In the above method, it is preferable that all of the scribe lines are formed by a scribe rotary blade.

  In this way, the scribe line can be formed at a high speed, so that the product portion can be manufactured with better manufacturing efficiency.

  Furthermore, the present invention created in order to solve the above-described problems is characterized in that a glass film having a thickness of 300 μm or less has a substantially rectangular outer peripheral contour in which at least one of four corners is corner-cut.

  According to such a structure, when the said glass film is laminated | stacked on the support glass plate by which the same location as the glass film was cut corner among four corners, the outer periphery outline of a support glass plate was followed. The outer contour will extend. Thereby, it becomes possible to acquire the same effect as the matter already described about the above-mentioned glass film laminated body.

  As described above, according to the present invention, the area of the effective surface of the glass film can be as large as possible with respect to the area of the mating surface in the support glass plate. Moreover, a glass film suitable for producing this effect can be easily produced.

It is a top view which shows the glass film laminated body which concerns on embodiment of this invention. It is a top view which shows the glass film laminated body which concerns on other embodiment of this invention. It is a top view which shows the glass film used as the object which implements the cutting method of the glass film which concerns on 1st embodiment of this invention. It is a top view which shows the cutting method of the glass film which concerns on 1st embodiment of this invention. It is a top view which shows the cutting method of the glass film which concerns on 1st embodiment of this invention. It is a top view which shows the cutting method of the glass film which concerns on 1st embodiment of this invention. (A), (b) is a top view which shows the malfunction at the time of cut | disconnecting a glass film by the method which is not based on embodiment of this invention. (A), (b) is a top view which shows the cutting method of the glass film which concerns on 1st embodiment of this invention. It is a top view which shows the malfunction at the time of cut | disconnecting a glass film by the method which does not depend on embodiment of this invention. It is a top view which shows the cutting method of the glass film which concerns on 1st embodiment of this invention. (A)-(g) is the top view which showed the cutting method of the glass film which concerns on 2nd embodiment of this invention in time series order. (A)-(c) is the top view which showed the cutting method of the glass film which concerns on other embodiment of this invention in time series order. (A), (b) is a top view which shows the conventional glass film laminated body.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a plan view showing a glass film laminate G according to an embodiment of the present invention. As shown in the figure, the glass film laminate G is composed of a glass film 1 having a thickness of 300 μm or less and a supporting glass plate 2 that supports the glass film 1. In addition, as thickness of the glass film 1, it is preferable that it is 200 micrometers or less, and it is more preferable that it is 100 micrometers or less.

  The glass film 1 includes four corner cut portions 1b, a pair of side portions 1c extending in the longitudinal direction (left and right in the figure) connecting the corner cut portions 1b, and a width direction (up and down in the figure). The outer peripheral contour of the effective surface 1a is constituted by a pair of side portions 1c extending in the direction), and has a substantially rectangular shape.

  Of the four corner cut portions 1b, three portions have an inclination angle of 45 ° with respect to both the side portion 1c extending in the longitudinal direction and the side portion 1c extending in the width direction. Here, the dimensions of the three corner cut portions 1b are preferably C1 to C10. Further, the corner cut portion 1b located at the lower right in FIG. 1 has an inclination angle of 30 ° with respect to the side portion 1c extending in the longitudinal direction and 60 ° with respect to the side portion 1c extending in the width direction. The orientation flat OF1 has a different inclination angle with respect to the side portion 1c from the other three locations. In addition, as will be described later, the inclination angle at which each corner cut portion 1b is inclined with respect to the side portion 1c connected to the corner cut portion 1b is not limited to these sizes.

  Here, each of the side portions 1c and each of the corner cut portions 1b can also be performed by performing cutting by laser irradiation on the original plate from which the glass film 1 is based, in addition to a glass film cutting method described later. It is possible to form. Moreover, in the glass film 1, the surface roughness Ra is 2.0 nm or less as for the mating surface (the back surface of the effective surface 1a) used as the surface on the side facing the support glass plate 2. The Ra value is adjusted by adjusting the concentration of the etchant, the solution temperature, and the processing time when, for example, performing chemical etching on the mating surfaces, in addition to using glass formed by the overflow downdraw method without polishing. It is possible to control to 2.0 nm or less.

  As with the glass film 1, the supporting glass plate 2 includes four corner cut portions 2 b, a pair of side portions 2 c extending in the longitudinal direction connecting the corner cut portions 2 b, and a pair of sides extending in the width direction. The outer peripheral contour is constituted by the part 2c, and the mating surface 2a which is the surface facing the glass film 1 has a substantially rectangular shape. The mating surface 2 a has a larger area than the effective surface 1 a of the glass film 1. In addition, each inclination | tilt angle of the corner cut part 2b with respect to each of the edge part 2c is the same as that of the glass film 1, and is the same one place as the glass film 1 in four corners of the support glass plate 2 (it is located in the lower right in FIG. 1). This also applies to the fact that the corner cut portion 2b) to be oriented is the orientation flat OF2. Here, the dimensions of the three corner cut portions 2b excluding the orientation flat OF2 are preferably C1 to C10. Further, a separation distance between the outer peripheral contour of the effective surface 1 a of the glass film 1 and the outer peripheral contour of the mating surface 2 a of the support glass plate 2 (the mating surface 2 a of the support glass plate 2 protrudes from the outer contour of the glass film 1. Is preferably 5 mm or less, more preferably 3 mm or less, and most preferably 1 mm or less.

  Here, as the supporting glass plate 2, for example, a defective glass plate that cannot be employed for a liquid crystal panel can be used. In addition, the mating surface 2a of the support glass plate 2 has a surface roughness Ra of 2.0 nm or less, like the mating surface of the glass film 1. Further, each of the corner cut portions 2b is formed by forming a scribe line with respect to the original plate of the support glass plate 2, executing a split along the scribe line, executing cutting by laser irradiation, executing polishing with a grindstone, and the like. Is possible.

  In addition, in this glass film laminated body G, the surface roughness Ra shall be 2.0 nm or less about each of the mating surface (back surface of the effective surface 1a) of the glass film 1, and the mating surface 2a of the support glass plate 2. Since the two mating surfaces are in direct surface contact with each other, an appropriate adhesive force is applied between the two glasses 1 and 2 so that they can be separated from each other at a desired timing. This moderate adhesion is assumed to be caused by hydrogen bonding.

  Here, as a structure of the glass film laminated body G, in addition to what laminated | stacked the above glass films 1 and the support glass plate 2 in direct surface contact, the adhesive force which acts between both the glasses 1 and 2 is carried out. The structure which interposes the resin layer which consists of an acrylic resin, a silicone resin, etc. between the glass film 1 and the support glass plate 2 for the purpose of adjusting the magnitude | size of this may be sufficient.

  Further, as the configuration of the supporting glass plate 2, in addition to the configuration including the corner cut portions 2b at all the four corners as described above, as shown in FIG. 2, at least one of the four corners (in FIG. The configuration may include a corner cut portion 2b (orientation flat OF2) at only a portion. In this case, as a structure of the glass film 1, it is necessary to set it as the structure provided with the corner cut part 1b (orientation flat OF1) in the same location as the support glass plate 2 among four corners.

  Hereinafter, the effect at the time of utilizing the glass film laminated body G which concerns on embodiment of this invention mentioned above is demonstrated.

  According to such a glass film laminate G, both the glass film 1 and the supporting glass plate 2 have a substantially rectangular outer peripheral contour provided with corner cut portions 1b and 2b at the same place among the four corners. The outer peripheral contours of both glasses 1 and 2 can be made as close as possible. As a result, the area of the effective surface 1a of the glass film 1 can be as large as possible with respect to the area of the mating surface 2a in the support glass plate 2.

  In addition, for each of the glass film 1 and the supporting glass plate 2, the corner cut portions 1b and 2b existing at the same one of the four corners are the orientation flats OF1 and OF2, for example, for a liquid crystal panel. When a transparent electrode is formed on the glass film 1, it is possible to accurately avoid the occurrence of a situation in which the direction in which the electrode is to be formed is mistaken.

  Furthermore, when forming the corner cut part 1b in the glass film 1, forming the said corner cut part 1b by implementing a grinding process with respect to the corner part of the original plate used as the origin of the glass film 1 is also considered. However, when the corner cut portion 1b is formed in such a manner, it is assumed that the glass powder scattered during the execution of grinding causes problems such as adhering to the mating surface (the back surface of the effective surface 1a). Therefore, when the glass film 1 and the supporting glass plate 2 are laminated | stacked, possibility that a bubble will generate | occur | produce between both the glasses 1 and 2 is high. And it becomes a cause of the pattern abnormality of the circuit in which this bubble is formed.

  However, in the glass film 1 employed in the glass film laminate G, the corner cut portion 1b is formed by performing a glass film cutting method described later, performing cutting by laser irradiation, and the like. It is possible to suitably prevent the occurrence of the trouble caused.

  In addition, as shown in FIG. 1, when the configuration of the support glass plate 2 is configured to include the corner cut portions 2b at all four corners, for example, when the glass film laminate G is conveyed by a belt conveyor or the like. In addition, even when the support glass plate 2 comes into contact with a jig or the like installed around the conveyance path, it is possible to suitably avoid occurrence of chipping or cracking.

  Furthermore, according to this glass film laminated body G, the area of the mating surface 2a of the support glass plate 2 which protrudes from the outer periphery outline of the glass film 1 is ensured by ensuring the area of the effective surface 1a as large as possible. Smallly suppressed. Therefore, in the state of the glass film laminate G, when the glass film 1 undergoes a process including wet coating and cleaning associated therewith, it is difficult for organic residues to adhere to the protruding mating surface 2a. . Moreover, even if it adheres, the cleaning becomes easy. As a result, it is possible to suitably avoid the occurrence of a situation where it is difficult or impossible to peel the glass film 1 from the support glass plate 2 due to the sticking of the organic matter.

  Hereinafter, the cutting method of the glass film which concerns on 1st embodiment of this invention for manufacturing the glass film mentioned above is demonstrated with reference to attached drawing.

  FIG. 3 shows a glass film 1 (here, corresponding to an original plate from which a product part P, which will be described later), which is a target for carrying out the method, for the method for cutting a glass film according to the first embodiment of the present invention. FIG. As shown in the figure, the glass film 1 has a rectangular outline shape.

  The glass film 1 has a substantially rectangular outer peripheral contour with four corners cut, and includes a product part P to be cut out. The product part P is a pair of cutting plans extending in the longitudinal direction. It is surrounded by a line CL1, a pair of planned cutting lines CL2 extending in the width direction, and planned cutting lines CL3 and CL4 that intersect both the planned cutting lines CL1 and CL2. The planned cutting line CL3 has an inclination angle of 45 ° with respect to both the planned cutting lines CL1 and CL2. Further, the planned cutting line CL4 has an inclination angle of 30 ° with respect to the planned cutting line CL1, and has an inclination angle of 60 ° with respect to the planned cutting line CL2.

  Here, the inclination angles of the planned cutting line CL3 and the planned cutting line CL4 with respect to the planned cutting lines CL1 and CL2 are not limited to these sizes, and may be other sizes as long as they are 20 ° or more. In this case, however, the inclination angle of the planned cutting line CL4 with respect to the planned cutting lines CL1 and CL2 is different from the inclination angle of the planned cutting line CL3 with respect to the planned cutting lines CL1 and CL2.

  As shown in FIG. 4, first, the scribe wheel H as a scribe rotary blade is run along each of the planned cutting lines CL <b> 1 to CL <b> 4 on the glass film 1, so that the side portion 1 c in the product portion P is obtained. Scribe lines S1 and S2 for cutting out each of these and scribe lines S3 and S4 for cutting out each of the corner cut portions 1b in the product portion P are formed. At this time, the scribe lines S3 and S4 are formed deeper in the thickness direction than the scribe lines S1 and S2.

  Here, the depth of the scribe lines S3 and S4 for cutting out each of the corner cut portions 1b is 10% or more deeper than the depth of the scribe lines S1 and S2 for cutting out each of the side portions 1c. Is preferred. In order to form the scribe lines S3 and S4 deeper than the scribe lines S1 and S2, the scribe lines S3 and S4 are formed when the scribe lines S1 and S2 are formed. It is necessary to increase the pressing force applied to the glass film 1 by the scribe wheel H or to reduce the traveling speed of the scribe wheel H as compared with.

  Then, after the formation of the scribe lines S1 to S4 on the glass film 1 is completed, before the glass film 1 is split along the scribe lines S1 and S2, as indicated by the white double-ended arrows in FIG. In addition, the bending of the glass film 1 along the scribe lines S3 and S4 is performed by applying a bending moment to the periphery of all the scribe lines S3 and S4.

  Thereby, as shown in FIG. 5, each corner cut part 1b in the product part P is cut out. Then, as shown by the white double-ended arrows in the figure, the glass film 1 is broken along the scribe lines S1 and S2 by applying a bending moment around the scribe lines S1 and S2. Execute. Thereby, as shown in FIG. 6, each side part 1c in the product part P is cut out. By passing through the above process, the cutting of the product part P from the glass film 1 is completed.

  In the present embodiment, the folding of the glass film 1 along all of the scribe lines S3 and S4 is performed before the folding along the scribe lines S1 and S2. That is, after all the corner cut parts 1b in the product part P are cut out together first, the side parts 1c in the product part P are cut out together later. However, the present invention is not limited to such a mode, and the folding for cutting out each of the side portions 1c continues to both ends of each side portion 1c even after all the corner cut portions 1b are cut out. If it is after the corner cut part 1b is cut out, it can be executed at an arbitrary timing.

  Hereinafter, the operation and effect of the glass film cutting method according to the first embodiment of the present invention described above will be described.

  According to this cutting method, all the corner cut portions 1b and the four side portions 1c of the product portion P are formed on the glass film 1 with the scribe lines S1 to S4 and folded along the scribe lines S1 to S4. Since it cuts out by execution of splitting, the cutting of the product part P from the glass film 1 can be performed easily and at high speed. Thereby, the product part P can be manufactured with good manufacturing efficiency. And when this product part P is laminated | stacked on the support glass plate by which the four corners were corner-cut, the area of the effective surface 1a is ensured as much as possible with respect to the area of the mating surface of the said support glass plate. Is done.

  Further, by forming the scribe lines S3 and S4 for cutting out the corner cut portion 1b deeper than the scribe lines S1 and S2 for cutting out the side portions, the folding for cutting out each of the corner cut portions 1b is as follows: It becomes possible to carry out with a bending stress smaller than the split for cutting out each of the side portions 1c. Due to this, in the corner cut portion 1b, it becomes easier to avoid the occurrence of uncut portions compared to the side portion 1c.

  Furthermore, in this glass film cutting method, after all the corner cut portions 1b in the product portion P are cut out together first, each of the side portions 1c in the product portion P is cut out later. Therefore, a split for cutting out each of the side parts 1c (hereinafter referred to as a side cut) is a split for cutting out the corner cut parts 1b connected to both ends of each side 1c (hereinafter referred to as a corner cut split). Will be running later. From this, the following effects can be obtained.

  When edge splitting is performed prior to corner cut splitting, the following problems may occur. That is, as shown in FIG. 7 (a), when performing the corner cut splitting, the area of the part removed from the glass film 1 by the execution of the corner cut splitting (in the figure, the area of the hatched part). (Area) is reduced by the amount of edge folding performed first. Due to this, the bending stress does not act favorably around the scribe lines S3 and S4, and it is generally difficult to perform the corner cut splitting. As shown in FIG. It becomes easy to generate uncut K in 1b. However, as shown in FIGS. 8 (a) and 8 (b), when the edge splitting is executed after the corner cut splitting, the area of the part removed from the glass film 1 when the corner cut splitting is executed. Since the area (the area of the hatched portion in FIG. 8A) is sufficiently secured, it is possible to suitably avoid the occurrence of such a problem.

  In addition, according to this method for cutting a glass film, the planned cutting line CL3 has an inclination angle of 45 ° with respect to both the planned cutting lines CL1 and CL2, and the planned cutting line CL4 becomes the planned cutting line CL1. On the other hand, it has an inclination angle of 30 ° and an inclination angle of 60 ° with respect to the planned cutting line CL2. Thereby, in the product part P after cutting, each of the corner cut parts 1b has an inclination angle of 20 ° or more with respect to the side part 1c connected to the corner cut part 1b.

  Therefore, the following effects can be obtained. That is, as shown in FIG. 9, each corner cut portion 1b is applied to the glass film 1 during the corner cut splitting as the inclination angle θ inclined with respect to the side portion 1c connected to the corner cut portion 1b becomes smaller. The acting bending stress does not act effectively in the vicinity of the end portions of the scribe lines S3 and S4, and the uncut K tends to occur in the corner cut portion 1b. However, as shown in FIG. 10, if each of the corner cut portions 1b has an inclination angle θ of 20 ° or more with respect to the side portion 1c connected to the corner cut portion 1b, such a problem occurs. Can be suitably avoided.

  Further, according to this cutting method, since all the scribe lines S1 to S4 are formed by the scribe wheel H, the scribe lines S1 to S4 can be formed at a high speed. As a result, the product part P can be manufactured with better manufacturing efficiency.

  Hereinafter, the cutting method of the glass film which concerns on 2nd embodiment of this invention is demonstrated with reference to attached drawing. In the description of the second embodiment and other embodiments hereinafter, elements that have already been described in the first embodiment described above are denoted by the same reference numerals in the drawings for describing these embodiments. Thus, duplicate explanations are omitted.

  FIGS. 11A to 11G are plan views showing the glass film cutting method according to the second embodiment of the present invention in chronological order. In addition, in the cutting method of the glass film which concerns on this embodiment, the structure of the glass film 1 used as the object which implements the said method, and the product part P obtained after implementation of the said method is the same as said 1st embodiment. is there.

  The glass film cutting method according to the second embodiment is different from the glass film cutting method according to the first embodiment described above after the scribe lines S1 to S4 are formed on the glass film 1. The execution of folding for forming the corner cut portion 1b in the product part P and the execution of splitting for forming the side portion 1c are executed in different orders. About another aspect, it is the same as said 1st embodiment.

  In this embodiment, first, as shown in FIG. 11A, after forming the scribe lines S1 to S4 on the glass film 1, the corner cut portions located at the upper right and the upper left in FIG. 11B. The folding for cutting out 1b is executed. Then, for the side portion 1c that connects the cut-out corner cut portions 1b to each other, folding for cutting out the side portion 1c is executed.

  Thereby, as shown in FIG.11 (c), it will be in the state where the two corner cut parts 1b in the product part P in the product part P, and the edge part 1c which connects both the corner cut parts 1b were cut out from the glass film 1. FIG. . And the product part P is cut out from the glass film 1 to the state shown in FIG.11 (d) by performing the folding for cutting out the corner cut part 1b located in the lower left in the figure next.

  After that, for the side portion 1c that connects the newly cut out lower left corner cut portion 1b and the already cut out upper left corner cut portion 1b to each other, folding for cutting out the side portion 1c is executed. Thereafter, as shown in FIGS. 11 (e) to 11 (g), the side portion 1c connecting the newly cut corner cut portion 1b and the already cut corner cut portion 1b to each other By sequentially performing the splitting for cutting out the side portion 1c, the cutting out of the product portion P from the glass film 1 is completed.

  Hereinafter, the operation and effect of the glass film cutting method according to the second embodiment of the present invention described above will be described.

  According to this cutting method, the same operation and effect as the glass film cutting method according to the first embodiment described above can be obtained. Further, in the glass film cutting method according to the second embodiment, since the side folds are performed after the corner cuts, it is possible to accurately prevent the corner cut part 1b from being uncut. Can be avoided.

  In addition, in the cutting method of the glass film which concerns on said 1st embodiment and 2nd embodiment, it has become the aspect which cuts out the product part P provided with the corner cut part 1b in all four corners from the glass film 1. However, as shown to Fig.12 (a)-(c), the aspect which cuts out the product part P provided with the corner cut part 1b (orientation flat OF1) in at least one place (in the figure, only one place) of four corners It may be.

  In this embodiment, first, as shown in FIG. 12A, after forming scribe lines S1, S2, S4 on the glass film 1, as shown in FIG. 12B, the corner cut portion 1b is formed. Folding for cutting out (orientation flat OF1) is executed. Then, as shown in FIG.12 (c), the folding for cutting out each of the edge parts 1c is performed.

  Also by this cutting method, the same operation and effect as the glass film cutting method according to the first embodiment described above can be obtained. Further, since the edge splitting is performed after the corner cut splitting, it is possible to accurately avoid a situation in which the corner cut portion 1b (orientation flat OF1) is left uncut.

  Here, the present invention is not limited to the configurations and aspects described in the above embodiments. For example, the inclination angle at which the corner cut portion of the glass film and the supporting glass plate is inclined with respect to the side portion connected to the corner cut portion is not limited to the size described in the above embodiment, and may be 20 ° or more. For example, the size may be appropriately increased or decreased. Further, in the above embodiment, the mating surface of the support glass plate has a configuration with a large area around the effective surface of the glass film, but the configuration in which they overlap in plan view (support glass plate) The outer peripheral contour of the glass film and the outer peripheral contour of the glass film may coincide with each other. If it does in this way, the area of the effective surface of a glass film can be ensured more largely.

  Furthermore, in the above embodiment, when cutting out the product portion from the glass film as the original plate, after all the scribe lines to be formed on the glass film have been formed, the folding along the scribe line is executed. However, for example, it may be configured such that the formation of the scribe line and the execution of the folding are performed alternately.

DESCRIPTION OF SYMBOLS 1 Glass film 1a Effective surface 1b Corner cut part 1c Side part OF1 Orientation flat 2 Support glass plate 2a Matching surface 2b Corner cut part 2c Side part OF2 Orientation flat G Glass film laminated body P Product part CL1 Planned cutting line CL2 Planned cutting line CL3 Scheduled cutting line CL4 Scheduled cutting line S1 Scribe line S2 Scribe line S3 Scribe line S4 Scribe line H Scribe wheel θ Inclination angle K Uncut

Claims (9)

In a glass film laminate in which a glass film having a thickness of 300 μm or less and a supporting glass plate supporting the glass film and having a substantially rectangular outer peripheral contour in which at least one of the four corners is corner-cut,
The glass film has a substantially rectangular outer contour in which the same part as the support glass plate is cut out of the four corners,
A glass film laminate, wherein the outer peripheral contour of the glass film extends following the outer peripheral contour of the supporting glass plate.   The glass film laminate according to claim 1, wherein all four corners of each of the glass film and the supporting glass plate are corner-cut.   The glass film laminate according to claim 1 or 2, wherein each of the glass film and the supporting glass plate has an orientation flat at a corner cut portion at the same one of the four corners. . From a glass film having a thickness of 300 μm or less,
In a method of cutting out a substantially rectangular product part having a corner cut part existing in at least one of the four corners and a side part connected to the corner cut part,
All of the corner cut portion and the side portion are cut out by executing scribe line formation on the glass film and splitting of the glass film along the scribe line, respectively. Glass film cutting method.   5. The glass film according to claim 4, wherein the scribe line for cutting out the corner cut portion is formed deeper in a plate thickness direction than the scribe line for cutting out each of the side portions. Cutting method.   The cutting of the glass film according to claim 4 or 5, wherein the splitting for cutting out each of the side portions is performed after the splitting for cutting out the corner cut portion connected to each side portion. Method.   The method for cutting a glass film according to any one of claims 4 to 6, wherein the corner cut part has an inclination angle of 20 ° or more with respect to the side part connected to the corner cut part.   All the said scribe lines are formed with a scribe rotary blade, The cutting method of the glass film in any one of Claims 4-7 characterized by the above-mentioned. In a glass film having a thickness of 300 μm or less,
A glass film having a substantially rectangular outer peripheral contour in which at least one of four corners is corner-cut.

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