KR20110102439A - Glass laminate and manufacturing method therefor - Google Patents

Abstract

This invention has the thin glass substrate which has a 1st main surface and a 2nd main surface, the support glass substrate which has a 1st main surface, and a 2nd main surface, and the resin layer which has easy peelability, The 1st main surface and said support of the said thin glass substrate The thin glass substrate and the supporting glass substrate are laminated glass via the resin layer so that the resin layer fixed to the first main surface of the glass substrate is in close contact, and the thin glass substrate is formed of the thin glass substrate. It relates to the glass laminated body laminated | stacked so that at least one part of the outer periphery of a 1st main surface may protrude from the outer periphery of the 1st main surface of the said support glass substrate.

Description

Glass laminate and manufacturing method thereof {GLASS LAMINATE AND MANUFACTURING METHOD THEREFOR}

TECHNICAL FIELD This invention relates to the glass laminated body containing the glass substrate used for a liquid crystal display device, an organic electroluminescence display, etc., and its manufacturing method.

In the field of liquid crystal display devices (LCDs), organic EL display devices (OLEDs), especially portable display devices such as mobile phones and digital cameras, weight reduction and thinning of display devices are important problems.

In order to cope with this problem, it is desired to further reduce the thickness of the glass substrate used for the display device. As a method of thinning the plate | board thickness of a glass substrate, generally, before or after forming the member for display apparatuses on the surface of a glass substrate, a glass substrate is etched using hydrofluoric acid etc., and further physical as needed. A method of polishing and thinning is performed.

However, when the plate thickness of a glass substrate is made thin by performing an etching process etc. before forming the member for display apparatuses on the surface of a glass substrate, the intensity | strength of a glass substrate will fall and the curvature amount will also increase. For this reason, the problem which becomes difficult to process by the manufacturing line of the existing member for display apparatuses arises.

In addition, when the glass substrate is thinned by forming an display device member on the surface of the glass substrate and then performing an etching process or the like, fine scratches formed on the surface of the glass substrate in the process of forming the display device member on the glass substrate surface The problem of presenting, namely the occurrence of etchpit, arises.

Therefore, for the purpose of solving such a problem, a thin glass substrate (hereinafter also referred to as a "thin glass substrate") is bonded to another supporting glass substrate to form a glass laminate, and a display device is manufactured in that state. The predetermined process for doing this is performed, and the method of isolate | separating a thin glass substrate and a support glass substrate after that is proposed.

For example, in following patent document 1, it is a thin glass laminated body which laminated | stacks a thin glass substrate and a support glass substrate, and the said thin glass substrate and the said support glass substrate are laminated | stacked through the silicone resin layer which has easy peelability and non-tackiness. The thin glass laminated body characterized by the above-mentioned is described.

International Publication No. 2007/018028 Pamphlet

In patent document 1, about the relative magnitude relationship of a thin glass substrate and a support glass substrate, it is described that a support glass substrate is the same size as a thin glass substrate, or it is larger than it. That is, patent document 1 has shown that the outer periphery of the 1st main surface of a thin glass substrate enters an inner peripheral side rather than the outer periphery of the 1st main surface of a support glass substrate. In this configuration, when the thin glass substrate is put into a step of peeling from the supporting glass substrate, the following problem is assumed. When the peeling blade is to be inserted into the boundary between the thin glass substrate and the resin layer, the peeling blade is not inserted into the boundary but inserted into the resin layer. For this reason, the resin layer is partially destroyed by the peeling blade, which causes a problem that a part of the broken resin layer remains attached to the thin glass substrate.

5 and 6 are enlarged cross-sectional views showing end portions of a conventional glass laminate. 5 shows the outer circumference of the first main surface 53a of the supporting glass substrate 53 and the thin glass substrate 52 when the glass laminate 50 is reduced from the second main surface 52b side of the thin glass substrate 52. It is an expanded sectional view of the edge vicinity of the glass laminated body 50 of the form in which the outer periphery of the 1st main surface 52a of () overlaps substantially. That is, the thin glass substrate 52 and the support glass substrate 53 are of the same size. 6, when the glass laminated body 60 was reduced from the 2nd main surface 62b side of the thin glass substrate 62, the outer periphery of the 1st main surface 63a of the support glass substrate 63 becomes a thin glass substrate. It is an expanded sectional view of the edge vicinity of the glass laminated body 60 of the form which protrudes outward from the outer periphery of the 1st main surface 62a of 62. FIG. That is, the support glass substrate 63 is larger than the thin glass substrate 62.

In the form of the glass laminated bodies 50 and 60 of FIG. 5 and FIG. 6, when the thin glass substrates 52 and 62 are put into the process of peeling from the support glass substrates 53 and 63, the peeling blade 15 of The tip is not inserted into the boundary between the first main surfaces 52a and 62a and the resin layers 54 and 64 of the thin glass substrate, but is inserted into the resin layers 54 and 64. For this reason, the peeling blade 15 destroys the resin layers 54 and 64, and a part of the resin layer remains on the first main surfaces 52a and 62a of the thin glass substrate, thereby supporting the supporting glass substrates 53 and 63. Peeling off.

In addition, although it can be considered to form a concave depression at the end of the supporting glass substrate to facilitate peeling of the thin glass substrate, a step for forming the concave depression in the supporting glass substrate is required, and the production time of the glass laminate is further increased. Cause trouble.

MEANS TO SOLVE THE PROBLEM This inventor earnestly examined and completed this invention in order to solve the said subject.

That is, this invention relates to the following (1)-(8).

(1) It has a thin glass substrate which has a 1st main surface and a 2nd main surface, the support glass substrate which has a 1st main surface, and a 2nd main surface, and the resin layer which has easy peelability, The 1st main surface and said support of the said thin glass substrate The thin glass substrate and the supporting glass substrate are laminated glass via the resin layer so that the resin layer fixed to the first main surface of the glass substrate is in close contact with each other,

The said laminated glass substrate is laminated | stacked so that at least one part of the outer periphery of the 1st main surface of the said thin glass substrate may protrude from the outer periphery of the 1st main surface of the said support glass substrate.

(2) The first main surface of the thin glass substrate and the first main surface of the supporting glass substrate have a rectangular shape, and the length of each of the length and / or the horizontal length of the first main surface of the thin glass substrate is the supporting glass substrate. The glass laminated body as described in (1) longer than each length of the longitudinal and / or horizontal of the 1st main surface of the.

(3) The length of each of the length and / or width of the first main surface of the thin glass substrate is 0.2 mm to 20 mm longer than the length of each of the length and / or width of the first main surface of the supporting glass substrate, (1 ) Or the glass laminate according to (2).

(4) The glass laminate according to any one of (1) to (3), wherein the entire outer circumference of the first main surface of the thin glass substrate protrudes outward from the outer circumference of the first main surface of the supporting glass substrate.

(5) The glass laminated body in any one of (1)-(4) whose resin which forms the said resin layer is at least 1 chosen from an acrylic resin, a polyolefin resin, a polyurethane resin, and a silicone resin.

(6) The glass laminated body in any one of (1)-(5) whose thickness of the said resin layer is 5-50 micrometers.

(7) The glass laminated body in any one of (1)-(6) whose difference of the linear expansion coefficient of the said thin glass substrate and the said support glass substrate is 150x10 <^-7> / degreeC or less.

(8) It is a manufacturing method of the glass laminated body in any one of said (1)-(7), The resin layer formation process of forming and fixing the resin layer which has easy peelability on the 1st main surface of the said support glass substrate, The manufacturing method of the glass laminated body including the adhesion process which adhere | attaches the said resin layer fixed on the 1st main surface of the said support glass substrate to the 1st main surface of the said thin glass substrate.

Moreover, this inventor completed the following invention about the following display apparatus panels and display apparatuses formed using these glass laminated bodies or a manufacturing method of this invention.

(9) The display device panel which has a support body which has a member for display devices on the 2nd main surface of the said thin glass substrate in the glass laminated body in any one of said (1)-(7).

(10) The panel for display devices formed using the panel for display devices which has a support body as described in said (9).

(11) The display device which has a panel for display devices as described in said (10).

(12) The display apparatus which has a support body containing the manufacturing method of the glass laminated body as described in said (8), and the process of forming a member for display apparatuses on the 2nd main surface of the said thin glass substrate in the obtained glass laminated body. Method for producing a panel for

(13) The said thin glass substrate and the said support glass substrate in the manufacturing method of the panel for display apparatuses which have a support body, and the obtained support body as described in said (12), The said thin glass substrate is said The manufacturing method of the panel for display apparatuses containing the peeling process of peeling from the location which protrudes from a support glass substrate as a starting point.

(14) The manufacturing method of the display apparatus containing the manufacturing method of the panel for display apparatus of said (13), and the process of obtaining a display apparatus using the obtained display apparatus panel.

The glass laminated body obtained by this invention does not need a special process to a support glass substrate, and in the process of peeling a thin glass substrate from a support glass substrate, it is easy to adhere | attach the thin glass substrate and resin layer which were in close contact, without destroying a resin layer. Moreover, it can peel in a short time.

Moreover, according to the manufacturing method of the glass laminated body of this invention, generation | occurrence | production of a glass defect and generation | occurrence | production of etch pits by foreign substances, such as a bubble and dust mixed between glass substrates, can be suppressed.

Moreover, the panel for display apparatus which has a support body containing such a glass laminated body can be provided. In addition, a display device panel and a display device formed using the display device panel having such a support can be provided.

Further, a display device panel, a display device panel, and a method of manufacturing the display device having such a support can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic front view which shows embodiment of the glass laminated body of this invention.
FIG. 2 is a schematic cross-sectional view illustrating the AA ′ cross section of FIG. 1.
It is a schematic sectional drawing which shows the edge part of embodiment of the glass laminated body of this invention.
(A), (b) and (c) is a schematic front view which shows other embodiment of the glass laminated body of this invention.
It is a schematic sectional drawing which shows the edge part of embodiment of the conventional glass laminated body.
It is a schematic sectional drawing which shows the edge part of embodiment of the conventional glass laminated body.

Embodiment of the glass laminated body of this invention is described using drawing.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic front view which shows embodiment of the glass laminated body (henceforth simply "laminated body") of this invention, and FIG. 2 is sectional drawing (A-A ') of FIG.

The laminated body 10 of this embodiment has the thin glass substrate 12, the support glass substrate 13, and the resin layer 14, and is laminated | stacked so that the resin layer 14 may be clamped on both glass substrates.

And as shown in FIG. 1, as for the laminated body 10 of this embodiment, in the laminated body 10 of this embodiment, the thin glass substrate 12, the resin layer 14, and the support glass substrate 13 are each rectangular, and a thin glass substrate At least a part of the outer circumference of the first main surface 12a of (12) is positioned to protrude outward in the main surface direction than the outer circumference of the first main surface 13a of the support glass substrate 13.

The resin layer 14 is fixed to the first main surface 13a of the supporting glass substrate 13, and is in close contact with the first main surface 12a of the thin glass substrate 12. In addition, the resin layer 14 is equipped with peelability with respect to the 1st main surface 12a of the thin glass substrate 12. Moreover, as shown in FIG. Here, of the two main surfaces which the thin glass substrate 12 has, the main surface of the side (side of the resin layer 14) of the support glass substrate 13 is the 1st main surface 12a, and the main surface on the opposite side is the 2nd main surface ( 12b). Moreover, of the two main surfaces which the support glass substrate 13 has, the main surface of the side of the thin glass substrate 12 (the side in which the resin layer 14 exists) is the 1st main surface 13a, and the main surface on the opposite side is 2nd It is the main surface 13b.

3 is a lamination of the present embodiment in which a part of the outer circumference of the first main surface 12a of the thin glass substrate 12 protrudes outward than a part of the outer circumference of the first main surface 13a of the supporting glass substrate 13. It is an expanded sectional view of the edge vicinity of the sieve 10. FIG. In this case, the front end of the peeling blade 15 is placed so as not to damage the first main surface 12a of the thin glass substrate 12, and then the first edge is directed toward the boundary between the thin glass substrate 12 and the resin layer 14. The main surface 12a can be slid. By sliding the peeling blade 15, the tip of the peeling blade 15 is inserted at the boundary between the thin glass substrate 12 and the resin layer 14 without destroying the resin layer 14, and the thin glass substrate It becomes possible to peel off 12 from the support glass substrate 13.

Next, each of the thin glass substrate, support glass substrate, and resin layer which the laminated body of this embodiment has is demonstrated.

The thin glass substrate in the present invention will be described.

The thickness, shape, size, physical properties (heat shrinkage rate, surface shape, chemical resistance, etc.), composition, and the like of the thin glass substrate are not particularly limited, and may be the same as, for example, glass substrates for display devices such as conventional LCDs and OLEDs. .

Although the thickness of a thin glass substrate is not specifically limited, It is preferable that it is less than 0.7 mm, It is more preferable that it is 0.5 mm or less, It is further more preferable that it is 0.4 mm or less. Moreover, it is preferable that it is 0.05 mm or more, It is more preferable that it is 0.07 mm or more, It is still more preferable that it is 0.1 mm or more.

Although the shape of a thin glass substrate is not restrict | limited, It is preferable that it is rectangular. A rectangle here is substantially a rectangle and also includes the shape which cut off the corner of the periphery (corner cut).

Although the size of a thin glass substrate is not restrict | limited, For example, in the case of a rectangle, 100-2000 mm x 100-2000 mm may be sufficient, and it is preferable that it is 500-1000 mm x 500-1000 mm.

Even if it is such a preferable thickness and preferable size, the laminated body of this embodiment can peel easily a thin glass substrate and a support glass substrate.

The properties such as thermal shrinkage, surface shape, chemical resistance and the like of the thin glass substrate are not particularly limited, and vary depending on the type of display device to be manufactured.

However, it is preferable that the thermal contraction rate of a thin glass substrate is small. Specifically preferred that the surface of linear expansion coefficient of the heat shrinkage rate using not more than 150 × 10 ^-7 / ℃ is, 100 × 10 ^-7 / ℃ and preferably, 45 × 10 ^-7 / ℃ or less is more than or less desirable. The reason for this is that a high thermal shrinkage rate makes it difficult to produce a high-precision display device. Moreover, it is preferable that the linear expansion coefficient of a thin glass substrate is 0 / degreeC or more.

In addition, in this invention, a linear expansion coefficient means what was prescribed | regulated to JIS R3102 (1995).

The composition of the thin glass substrate may be the same as, for example, a glass containing an alkali metal oxide known in the art or an alkali free glass. Especially, since thermal contraction rate is small, it is preferable that it is an alkali free glass.

Next, the support glass substrate in this invention is demonstrated.

The supporting glass substrate supports the thin glass substrate through the resin layer to reinforce the strength of the thin glass substrate.

The thickness, shape, physical properties (heat shrinkage rate, surface shape, chemical resistance, etc.), composition, and the like of the supporting glass substrate are not particularly limited.

Although the thickness in particular of a support glass substrate is not restrict | limited, It is necessary that it is thickness which can process the laminated body of this embodiment in the manufacturing process of the member for display devices of the present.

For example, it is preferable that it is 0.1-1.1 mm in thickness, It is more preferable that it is 0.3-0.8 mm, It is still more preferable that it is 0.4-0.7 mm.

For example, the current manufacturing process is designed to process a substrate having a thickness of 0.5 mm, and when the thickness of the thin glass substrate is 0.1 mm, the sum of the thickness of the supporting glass substrate and the thickness of the resin layer is 0.4 mm. In addition, the current manufacturing line is most commonly designed to process a glass substrate having a thickness of 0.7 mm, but, for example, if the thickness of the thin glass substrate is 0.4 mm, the sum of the thickness of the supporting glass substrate and the thickness of the resin layer. Is 0.3 mm.

It is preferable that the thickness of a support glass substrate is thicker than the said thin glass substrate.

Although the shape of a support glass substrate is not restrict | limited, It is preferable that it is rectangular. However, the rectangle here is substantially substantially rectangular, and also includes the shape which cut out the corner of the peripheral part (corner cut).

Although the size of the support glass substrate in this invention is not restrict | limited, It is preferable that it is smaller than a thin glass substrate. That is, it is preferable that the length of each of the length and / or the horizontal of the first main surface of the supporting glass substrate is shorter than the length of each of the length and / or the width of the first main surface of the thin glass substrate. Here, vertical means the short side direction of the thin glass substrate in FIG. 1, and is the direction of arrow Xa, and horizontal means the long side direction of the thin glass substrate in FIG. 1, and is the direction of arrow Xb. do. It is preferable that they are 0.2 mm or more and 20 mm or less as a range of the difference of the longitudinal length and / or the horizontal length of a thin glass substrate and a support glass substrate. When the difference of this length is 0.2 mm or more and 20 mm or less, in the process of peeling a thin glass substrate from a support glass substrate, since breakage of the resin layer by a peeling blade can be prevented, it is preferable. Moreover, since the protrusion part of a thin glass substrate becomes hard to bend and becomes difficult to bend, it is preferable. It is more preferable that the difference of this length is 2 mm or more and 15 mm or less.

In addition, the number of locations in which a part of the outer periphery of the 1st main surface of a thin glass substrate protrudes outward rather than the outer periphery of the 1st main surface of a support glass substrate is not restrict | limited. For example, FIG.4 (a)-(c) is a schematic front view of other embodiment of the laminated body of this invention. In these figures, in order to make understanding easy, only the 1st main surface of a thin glass substrate and the 1st main surface of a support glass substrate are described.

In embodiment in FIG.4 (a), two sides of four sides of the 1st main surface 42a of a thin glass substrate protrude outward from the outer periphery of the 1st main surface 43a of a support glass substrate. In embodiment in FIG.4 (b), three of four sides of the 1st main surface 42a of a thin glass substrate protrude outward from the outer periphery of the 1st main surface 43a of a support glass substrate. In embodiment in FIG.4 (c), all four sides of the 1st main surface 42a of a thin glass substrate protrude outward from the outer periphery of the 1st main surface 43a of a support glass substrate. Among these embodiments of FIGS. 4A to 4C, the embodiments of FIG. 4C are preferred. The reason is as follows. In the step of peeling the thin glass substrate from the supporting glass substrate, the operation of checking the thin glass projection direction of the laminate and inserting it into the step so that the insertion direction of the peeling blade and the laminated glass substrate projection direction of the laminate face each other. It becomes necessary. As in the embodiment of FIG. 4C, when all of the outer periphery of the first main surface of the thin glass substrate protrudes outward from the outer periphery of the first main surface of the supporting glass substrate, the work of confirming the thin glass protruding direction of the laminate This is preferable because it becomes unnecessary.

The linear expansion coefficient of the support glass substrate may be substantially the same as or different from the linear expansion coefficient of the thin glass substrate. If it is substantially the same, when heat-processing the laminated body of this embodiment, it is preferable at the point which a curvature hardly arises in a thin glass substrate or a support glass substrate.

The difference between the coefficient of linear expansion of the thin plate glass substrate and the supporting glass substrate is not more than 150 × 10 ^-7 / ℃ is preferred, more preferably not more than 100 × 10 ^-7 / ℃ is preferred, and less than 50 × 10 ^-7 / ℃ .

The composition of the supporting glass substrate may be the same as, for example, a glass containing an alkali metal oxide or an alkali free glass. Especially, since thermal contraction rate is small, it is preferable that it is an alkali free glass.

Next, the resin layer in this invention is demonstrated.

In the laminated body of this embodiment, the resin layer is being fixed to the 1st main surface of the said support glass substrate. And although the resin layer is in close contact with the 1st main surface of the said thin glass substrate, it can peel easily. That is, a resin layer has easy peelability with respect to the said thin glass substrate.

In the laminate of the present embodiment, the resin layer and the thin glass substrate are not attached by the adhesive force of the pressure-sensitive adhesive, but are attached by a force caused by van der Waals forces between solid molecules, that is, adhesion. .

The thickness of the resin layer is not particularly limited. It is preferable that it is 5-50 micrometers, It is more preferable that it is 5-30 micrometers, It is further more preferable that it is 7-20 micrometers. It is because the adhesiveness of a thin glass substrate and a resin layer becomes enough that the thickness of a resin layer is such a range. Moreover, even if foam | bubble and a foreign material exist, it is because generation | occurrence | production of the distortion defect of a thin glass substrate can be suppressed. In addition, if the thickness of the resin layer is too thick, it is not economical because it takes time and materials to form.

In addition, the resin layer may consist of two or more layers. In this case, "thickness of the resin layer" shall mean the thickness of the sum total of all the resin layers.

In addition, when a resin layer consists of two or more layers, the kind of resin which forms each layer may differ.

It is preferable that a surface tension is 30 mN / m or less, It is more preferable that it is 25 mN / m or less, It is still more preferable that it is 22 mN / m or less. If it is such a surface tension, it can peel more easily with a thin glass substrate, and also the adhesiveness with a thin glass substrate becomes sufficient at the same time. Moreover, it is preferable that surface tension of a resin layer is 15 mN / m or more.

Moreover, it is preferable that the glass transition point of a resin layer consists of a material lower than room temperature (about 25 degreeC), or does not have a glass transition point. It is because it becomes a non-adhesive resin layer, has peelability more easily, can peel with a thin glass substrate more easily, and at the same time, adhesiveness with a thin glass substrate becomes sufficient.

Moreover, it is preferable that a resin layer has heat resistance. For example, when forming the member for display apparatuses on the 2nd main surface of the said thin glass substrate, it is because the laminated body of this embodiment can be provided for heat processing.

Moreover, when the elasticity modulus of a resin layer is too high, there exists a tendency for adhesiveness with a thin glass substrate to become low. Moreover, when elastic modulus is too low, peelability will become low.

The kind of resin which forms a resin layer is not specifically limited. For example, an acrylic resin, a polyolefin resin, a polyurethane resin, and a silicone resin is mentioned. Several kinds of resins may be mixed and used. Especially, silicone resin is preferable. It is because silicone resin is excellent in heat resistance and also excellent in peelability with respect to a thin glass substrate. Moreover, it is because it is easy to fix to a support glass substrate by condensation reaction with the silanol group of the surface of a support glass substrate. It is also preferable that a silicone resin layer hardly deteriorates peelability even if it processes about 1 hour at 300-400 degreeC, for example.

Moreover, it is preferable that a resin layer consists of silicone for release papers among silicone resins, and it is preferable that it is hardened | cured material. Silicone for release papers is based on silicone containing linear dimethylpolysiloxane in a molecule | numerator. Since the resin layer formed by hardening | curing the composition containing this subject matter and a crosslinking agent on the surface (first main surface) of the said support glass substrate using a catalyst, a photoinitiator, etc. has excellent peelability, it is preferable. Moreover, since flexibility is high, generation | occurrence | production of the distortion defect of a thin glass substrate can be suppressed even if foreign matters, such as a bubble and dust, mix between a thin glass substrate and a resin layer.

Such release paper silicone is classified into condensation reaction type silicone, addition reaction type silicone, ultraviolet curing type silicone, and electron beam curing type silicone by its curing mechanism, but all can be used. Among these, addition reaction type silicone is preferable. This is because the degree of ease of peeling is good and the heat resistance is high when the curing reaction is easy and the resin layer is formed.

In addition, the release paper silicone has a solvent type, an emulsion type, and a non-solvent type in form, and any type can be used. Among these, a solventless type is preferable. This is because it is excellent in terms of productivity, safety and environmental characteristics. In addition, since it does not contain the solvent which generate | occur | produces foaming at the time of hardening at the time of forming a resin layer, ie, heating hardening, ultraviolet curing, or electron beam hardening, it is because a bubble is hard to remain in a resin layer.

Moreover, as silicone for release papers, KNS-320A, KS-847 (all are Shin-Etsu Silicone Co., Ltd.), TPR6700 (made by GE Toshiba Silicone Co., Ltd.), vinyl silicone "8500" specifically as a brand name or a product number which are commercially available Combination of Wagaku Kogyo Co., Ltd.) and methyl hydrogen polysiloxane `` 12031 '' (Arakawa Kagaku Kogyo Co., Ltd.), vinyl silicone `` 11364 '' (Arakawa Kagaku Kogaku Co., Ltd.) A combination of methyl hydrogen polysiloxane "12031" (made by Arakawa Chemical Co., Ltd.), vinyl silicone "11365" (made by Arakawa Chemical Co., Ltd.) and methylhydrogen polysiloxane "12031" (Araca And Kagaku Kogyo Co., Ltd.).

In addition, KNS-320A, KS-847, and TPR6700 are silicones containing a main material and a crosslinking agent previously.

Moreover, it is preferable that the silicone resin which forms a resin layer has the property which a component in a silicone resin layer is hard to transfer to a thin glass substrate, ie, low silicone transferability.

By forming a member for a display device on the second main surface of the thin glass substrate in such a laminate of the present embodiment, a display device panel having a support can be obtained.

The display device member includes various circuits such as a light emitting layer, a protective layer, a color filter, a liquid crystal, and a transparent electrode containing indium tin oxide (ITO) that a conventional glass substrate for a display device such as LCD and OLED has on its surface. Pattern or the like.

In addition, a display device can be obtained from such a display device panel. As a display apparatus, LCD and OLED are mentioned. Examples of the LCD include TN type, STN type, FE type, TFT type, and MIM type.

Next, an example of the manufacturing method of the laminated body of this embodiment is demonstrated.

Although the manufacturing method of the laminated body of this embodiment is not specifically limited, The resin layer formation process of forming and fixing the resin layer which has easy peelability on the 1st main surface of the said support glass substrate, and the 1st main surface of the said thin glass substrate It is preferable that it is a manufacturing method of the glass laminated body containing the adhesion process which adhere | attaches the said resin layer fixed on the 1st main surface of the said support glass substrate. Such a manufacturing method is also called "the manufacturing method of this embodiment" below.

The manufacturing method of the said thin glass substrate and the said support glass substrate itself used by the manufacturing method of this embodiment is not specifically limited. For example, it can manufacture by a conventionally well-known method. For example, after melt | dissolving a conventionally well-known glass raw material into molten glass, it can shape | mold and obtain it in plate shape by the float method, the fusion method, the down draw method, the slot down method, the reed method.

The resin layer formation process in the manufacturing method of this embodiment is demonstrated.

The method of forming a resin layer in the surface (first main surface) of the said support glass substrate is not specifically limited, either. For example, the method of sticking film-shaped resin to the surface of a support glass substrate is mentioned. Specifically, in order to provide high adhesive force with the surface of a film, the surface modification process (priming process) is performed to the surface of a support glass substrate, and the method of sticking to the 1st main surface of a support glass substrate is mentioned. For example, a chemical method such as a silane coupling agent (primer treatment), a physical method of increasing surface active groups such as a flame (flame) treatment, or a surface blast by increasing the surface roughness such as sandblast treatment Mechanical treatment methods for increasing the temperature and the like are exemplified.

For example, the method of coating the resin composition used as a resin layer on a 1st main surface of a support glass substrate by a well-known method is mentioned. Known methods include spray coating, die coating, spin coating, dip coating, roll coating, bar coating, screen printing, and gravure coating. In such a method, it can select suitably according to a kind to a resin composition.

Moreover, when coating a resin composition on the 1st main surface of a support glass substrate, it is preferable that it is 1-100 g / m <2>, and, as for the coating amount, it is more preferable that it is 5-20 g / m <2>.

For example, when forming a resin layer from addition reaction type | mold silicone, well-known methods, such as the above-mentioned spray coating method, for the resin composition containing the silicone (topic), crosslinking agent, and catalyst which contain linear dimethylpolysiloxane in a molecule | numerator It apply | coats on a support glass substrate by heat, and it heat-cures after that. Although the heat-hardening conditions differ also with the compounding quantity of a catalyst, For example, when 2 mass parts of platinum-type catalysts are mix | blended with respect to 100 mass parts of total amounts of a main body and a crosslinking agent, it is 50 degreeC-250 degreeC in air | atmosphere, Preferably The reaction is carried out at 100 ° C to 200 ° C. In addition, the reaction time in this case is 5 to 60 minutes, Preferably it is 10 to 30 minutes. In order to set it as the silicone resin layer which has low silicone transferability, it is preferable to advance hardening reaction as much as possible so that an unreacted silicone component may not remain in a silicone resin layer. The reaction temperature and reaction time as described above are preferable because unreacted silicone components can be left in the silicone resin layer. If the reaction time is too long or the reaction temperature is too high, oxidative decomposition of the silicone resin may occur at the same time, and a low molecular weight silicone component may be generated to increase silicon transferability. It is preferable to advance hardening reaction as much as possible so that unreacted silicone component may not remain in a silicone resin layer, in order to make the peelability after heat processing favorable.

In addition, for example, when a resin layer is manufactured using silicone for release paper, after heat-hardening the silicone for release paper apply | coated on the support glass substrate, and after forming a silicone resin layer, the silicone of a support glass substrate in an adhesion process is carried out. A thin glass substrate is laminated on the resin formation surface. By heat-hardening silicone for release paper, a silicone resin hardened | cured material bonds chemically with a support glass substrate. Moreover, a silicone resin layer couple | bonds with a support glass substrate by an anchor effect. By these actions, the silicone resin layer is firmly fixed to the supporting glass substrate.

The adhesion process will be described.

A contact process is a process of contact | adhering the said resin layer fixed on the 1st main surface of the said support glass substrate to the 1st main surface of the said thin glass substrate. The thin glass substrate and the resin layer are in close contact with the resin layer by a force attributable to van der Waals forces between the adjacent solid molecules, that is, adhesion. In this case, it can hold | maintain in the state laminated | stacked through the support glass substrate, the thin glass substrate, and the resin layer.

The method of laminating a thin glass substrate on the surface of the resin layer fixed to the supporting glass substrate is not particularly limited. For example, it can carry out using a well-known method. For example, after laminating a thin glass substrate on the surface of a resin layer in an atmospheric pressure environment, the method of crimping | bonding a resin layer and a thin glass substrate using a roll or a press is mentioned. Since a resin layer and a thin glass substrate contact more closely by crimping | bonding with a roll or a press, it is preferable. Moreover, since the bubble mixed in between a resin layer and a thin glass substrate is removed comparatively easily by the crimping | bonding by a roll or a press, it is preferable. When it crimps | bonds by the vacuum lamination method or the vacuum press method, it is more preferable because suppression of mixing of foam | bubble, and ensuring good adhesion are performed more preferable. By pressing under vacuum, even when a minute bubble remains, the bubble does not grow by heating, and there is also an advantage that it is difficult to lead to distortion defects of the thin glass substrate.

In a close_contact | adherence process, when laminating a thin glass substrate on the surface of the resin layer of a support glass substrate, it is preferable to wash | clean the surface of a thin glass substrate sufficiently and to laminate | stack in an environment with high cleanness. Even if foreign matter is mixed between the resin layer and the thin glass substrate, the resin layer is deformed, so that the flatness of the surface of the thin glass substrate is not affected. However, the higher the cleanness, the better the flatness is.

The glass laminated body of this embodiment can be manufactured by such a manufacturing method of this embodiment.

By the manufacturing method including the process of forming the member for display apparatuses in the manufacturing method of the glass laminated body of this embodiment further on the 2nd main surface of the said thin glass substrate in the obtained glass laminated body of this embodiment, The panel for display devices which have a support body can be manufactured.

The member for display device is not specifically limited here. For example, the array and color filter which LCD has can be mentioned. Moreover, the transparent electrode, a hole injection layer, a hole transport layer, a light emitting layer, and an electron carrying layer which OLED has, for example are mentioned.

The method for forming such a display device member is also not particularly limited, and may be the same as a conventionally known method.

For example, when manufacturing a TFT-LCD as a display apparatus, it seals the process of forming an array on a conventionally well-known glass substrate, the process of forming a color filter, the glass substrate in which the array was formed, and the glass substrate in which the color filter was formed. What is necessary is just to be the same as the various processes, such as the process (array color filter bonding process) of joining through etc. More specifically, as the process performed in these processes, pure water washing | cleaning, drying, film-forming, resist liquid application | coating, exposure, image development, etching, and resist removal are mentioned, for example. Moreover, as a process performed after performing an array color filter bonding process, there exist a liquid crystal injection process and a liquid crystal injection hole sealing process, and the process performed by these processes is mentioned.

In the case of manufacturing OLED, for example, a process for forming an organic EL structure on a second main surface of a thin glass substrate, a process of forming a transparent electrode, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, and the like Various processes, such as the process of vapor deposition and a sealing process, are included, As a process performed by these processes, a film-forming process, vapor deposition process, the adhesion process of a sealing plate, etc. are mentioned specifically ,.

In this way, a panel for a display device having a support can be manufactured.

Moreover, after obtaining the panel for display devices which have such a support body, in the obtained display device panel which has a support body, the panel for display devices can be obtained by peeling (peeling process) the said thin glass substrate and the said support glass substrate. .

A display device panel can be manufactured by peeling the said thin glass substrate and the said support glass substrate in the panel for display devices which have a support body obtained by the manufacturing method of this embodiment as described above, for example. The method of peeling is not particularly limited. Specifically, a peeling blade is attached on the 1st main surface of the thin glass substrate which protrudes outward rather than the outer periphery of the 1st main surface of a support glass substrate, for example. Next, the peeling blade slides on the first main surface of the thin glass substrate toward the boundary between the thin glass substrate and the resin layer. And after inserting a peeling blade at the said boundary and giving the opportunity of peeling, the mixed glass of water and compressed air can be sprayed at the said boundary, and a thin glass substrate can be peeled off. Preferably, the support glass substrate of the panel for display devices which has the said support body is provided on a surface plate so that an upper side and a panel side may become a lower side. Thereafter, the panel-side substrate is vacuum-adsorbed onto the surface plate (when the supporting glass substrates are laminated on both surfaces thereof, they are sequentially performed). In this state, the peeling blade is applied to the first main surface of the thin glass substrate, and the upper surface of the first glass surface of the thin glass substrate is slid toward the boundary between the thin glass substrate and the resin layer to insert the cutting blade into the boundary. Let's do it. Thereafter, a mixed fluid of water and compressed air is injected at the boundary between the thin glass substrate and the resin layer, and the end portion of the supporting glass substrate is stretched vertically upward. Then, an air layer is formed at the boundary between the resin layer and the thin glass substrate, and the air layer is spread over the entire surface of the boundary so that the supporting glass substrate can be easily peeled off (the thin glass substrate on the front side and the back side of the display device). If the supporting glass substrates are laminated on both sides of the substrate, the present operation is repeated one by one).

Moreover, a display apparatus can be manufactured by the manufacturing method including the process of obtaining a display apparatus using the obtained display apparatus panel.

Here, the operation in the step of obtaining the display device is not particularly limited, and for example, the display device can be manufactured by a conventionally known method.

<Examples>

(Example 1)

First, a supporting glass substrate (AN100, manufactured by Asahi Glass Co., Ltd.) having a length of 715 mm, a width of 595 mm, a sheet thickness of 0.4 mm, and a coefficient of linear expansion of 38 × 10 ⁻⁷ / ° C. was prepared. The surface was cleaned.

Next, a mixture of 100 parts by mass of a solvent-free addition-type release paper silicone and a mixture of 2 parts by mass of a platinum-based catalyst was coated on a first main surface of the supporting glass substrate with a screen printing machine having a length of 714 mm and a width of 594 mm. (Coating amount 30 g / m 2). And it heat-hardened in air | atmosphere for 30 minutes at 180 degreeC, and obtained the silicone resin layer of 20 micrometers in thickness.

Next, the first principal plane of the thin glass substrate (manufactured by Asahi Glass Co., Ltd., AN100) having a length of 720 mm, a width of 600 mm, a sheet thickness of 0.3 mm, and a coefficient of linear expansion of 38 x 10 ^-7 / deg. The surface on the side in contact with the ground layer) was purified by pure water cleaning and UV cleaning. And the surface of the silicone resin layer on the 1st main surface of the said support glass substrate, and the 1st main surface of a thin glass substrate are bonded so that the center of gravity of both board | substrates may overlap by vacuum press at room temperature, and glass laminated body A (this invention) Laminated body A) was obtained.

In the glass laminated body A which concerns on such Example 1, the thin glass substrate and the support glass substrate were closely_contact | adhered without generating a bubble, and there was no convex flaw and smoothness was also favorable.

(Example 2)

Example 2 was the same as Example 1, but the thin glass substrate with thinner plate | board thickness was used.

Initially, the supporting glass substrate (AN100, manufactured by Asahi Glass Co., Ltd., AN100) having a 718 mm length, 598 mm width, 0.6 mm thickness, and a coefficient of linear expansion of 38 × 10 ⁻⁷ / ° C. is purely cleaned and UV cleaned to clean the surface. It was.

Next, as the resin for forming the resin layer, linear polyorganosiloxanes having vinyl groups at both ends and methylhydrogenpolysiloxanes having a hydrosilyl group in the molecule were used. Then, the mixture was mixed with a platinum-based catalyst to prepare a mixture, and coated on a first main surface of the supporting glass substrate by a die coating apparatus having a length of 715 mm and a width of 595 mm (coating amount 20 g / m 2), 180 It heat-hardened in air | atmosphere for 30 minutes at ° C, and formed the silicone resin layer of 20 micrometers in thickness. Here, the mixing ratio of the linear polyorganosiloxane and the methylhydrogenpolysiloxane was adjusted so that the molar ratio of the hydrosilyl group and the vinyl group was 1/1. 5 mass parts of platinum-type catalysts were added with respect to a total of 100 mass parts of linear polyorganosiloxane and methylhydrogen polysiloxane.

Next, as a thin glass substrate, support glass was used using a glass substrate (manufactured by Asahi Glass Co., Ltd., AN100) having a length of 720 mm, a width of 600 mm, a thickness of 0.1 mm, and a linear expansion coefficient of 38 × 10 ⁻⁷ / ° C. The surface of the silicone resin layer on the 1st main surface of a board | substrate, and a thin glass substrate were bonded together so that the center of gravity of both board | substrates may overlap by vacuum press at room temperature, and glass laminated body B (laminate B of this invention) was obtained.

In the glass laminated body B which concerns on such Example 2, the thin glass substrate and the support glass substrate were in close contact with each other without generating bubbles, and there was no convex flaw and smoothness was also good.

(Example 3)

In this example, an LCD is manufactured using the glass laminate B obtained in Example 2.

Two glass laminates B are prepared and one sheet is provided to the array forming step to form an array on the second main surface of the thin glass substrate. The other one is provided to a color filter formation process, and forms a color filter on the 2nd main surface of a thin glass substrate.

After joining the glass laminated body in which the array was formed, and the glass laminated body in which the color filter was formed through the sealing material, the 0.25 mm-thick stainless steel peeling blade protrudes outward from the outer periphery of the 1st main surface of a support glass substrate. It hangs on the 1st main surface of a thin glass substrate. Next, the first main surface of the thin glass substrate is slid toward the boundary between the thin glass substrate and the resin layer, and a peeling blade is inserted into the boundary. Then, after spraying the mixed fluid of compressed air and water toward the said boundary, each supporting glass substrate is peeled off. Scratches do not exist in the resin layer fixed on the support glass substrate after peeling, and resin does not remain in a thin glass substrate.

Subsequently, the glass substrate which peeled the support glass substrate was cut | disconnected, and it divides into 168 cells of length 51mm x width 38mm, and performs a liquid crystal injection process and the sealing process of an injection port, and forms a liquid crystal cell. The process of adhering a polarizing plate to the formed liquid crystal cell is performed, and a module formation process is performed subsequently, and an LCD is obtained. LCD obtained in this way does not produce a problem in characteristic.

(Example 4)

In this example, LCD is manufactured using the glass laminate A obtained in Example 1.

Two glass laminates A are prepared and one sheet is provided to the array forming step to form an array on the second main surface of the thin glass substrate. The other one is provided to a color filter formation process, and a color filter is formed in the 2nd main surface of a thin glass substrate.

After joining the glass laminated body in which the array was formed, and the glass laminated body in which the color filter was formed through the sealing material, the 0.25 mm-thick stainless steel peeling blade protrudes outward from the outer periphery of the 1st main surface of a support glass substrate. It hangs on the 1st main surface of a thin glass substrate. Next, on the 1st main surface of a thin glass substrate, it slides toward the boundary of a thin glass substrate and a resin layer, and a peeling blade is inserted in the said boundary. Thereafter, a mixed fluid of water and compressed air is injected toward the boundary, and then each supporting glass substrate is peeled off. Scratches do not exist in the resin layer fixed on the support glass substrate after peeling, and resin does not remain in a thin glass substrate.

Subsequently, the thickness of each thin glass substrate is made 0.15 mm by a chemical etching process. On the surface of the thin glass substrate after the chemical etching treatment, the occurrence of etch pits, which are optically problematic, is not seen.

Then, the glass substrate from which the support glass substrate was peeled off was cut | disconnected, and it divided into 168 cells of length 51mm x width 38mm, and performs a liquid crystal injection process and the sealing process of an injection port, and forms a liquid crystal cell. The process of adhering a polarizing plate to the formed liquid crystal cell is performed, and a module formation process is performed subsequently, and an LCD is obtained. LCD obtained in this way does not produce a problem in characteristic.

(Example 5)

In this example, OLED is manufactured using the glass laminate B obtained in Example 2.

A step of forming a transparent electrode, a step of forming an auxiliary electrode, a step of depositing a hole injection layer, a hole transporting layer, a light emitting layer, an electron transporting layer, and the like, and a step of sealing them, on the second main surface of the thin glass substrate of the laminate. An organic EL structure is formed on the substrate.

A stainless steel peeling blade having a thickness of 0.25 mm is attached to the first main surface of the thin glass substrate that protrudes outward from the outer circumference of the first main surface of the supporting glass substrate. Next, the peeling blade is slid onto the first main surface of the thin glass substrate toward the boundary between the thin glass substrate and the resin layer of the laminate, and is inserted into the boundary. Thereafter, a mixed fluid of compressed air and water is injected toward the boundary, and then each supporting glass substrate is peeled off. Scratches do not exist in the resin layer fixed on the support glass substrate after peeling, and resin does not remain in a thin glass substrate.

Subsequently, the thin glass substrate is cut using a laser cutter or scribe-break method, divided into 288 cells of 41 mm in length and 30 mm in width, and then a glass substrate and an opposing substrate on which an organic EL structure is formed are assembled, and a module The formation process is performed to create an OLED. The OLED obtained in this way does not produce a problem in characteristic.

(Comparative Example 1)

The laminated body in this example was similar to Example 1 except having changed the magnitude | size of the length and width of a support glass substrate to length 720mm and width 600mm which are the same size as a thin glass substrate. In the glass laminated body C which concerns on the obtained comparative example 1, the glass substrate was in close_contact | adherence without generating a silicone resin layer and foam | bubble, and there was no convex flaw and smoothness was also favorable.

Subsequently, two glass laminated bodies C are prepared, one is provided to an array formation process, and an array is formed in the 2nd main surface of a thin glass substrate. The other one is provided to a color filter formation process, and a color filter is formed in the 2nd main surface of a thin glass substrate.

After bonding the laminated body in which an array was formed, and the laminated body in which the color filter was formed through the sealing material, the stainless steel peeling blade of 0.25 mm in thickness is attached to the 1st main surface of a thin glass substrate. Next, the first main surface of the thin glass substrate is slid toward the boundary between the thin glass substrate and the resin layer, and a peeling blade is inserted into the boundary. Thereafter, a mixed fluid of water and compressed air is injected toward the boundary, and then each supporting glass substrate is peeled off. The resin layer adhered on the supporting glass substrate after peeling has a scratch by the blade for peeling off, and a part of resin remains on the 1st main surface of a thin glass substrate. Therefore, in the display apparatus manufacturing process, the process of scraping off a part of resin adhering on the 1st main surface of a thin glass substrate with a razor or the like is further needed.

Although this invention was detailed also demonstrated with reference to the specific embodiment, it is clear for those skilled in the art that various changes and correction can be added without deviating from the mind and range of this invention.

This application is based on the JP Patent application 2009-003405 of an application on January 9, 2009, The content is taken in here as a reference.

Industrial availability

The thin glass substrate obtained by the present invention can be used as a glass substrate of various display devices.

10, 50, 60: glass laminate
12, 52, 62: thin glass substrate
12a, 42a, 52a, 62a: first main surface of thin glass substrate
12b, 52b, 62b: second main surface of thin glass substrate
13, 53, 63: support glass substrate
13a, 43a: first main surface of support glass substrate
13b: second main surface of the supporting glass substrate
14, 54, 64: resin layer
15: peeling blade
Xa: vertical arrow
Xb: horizontal arrows

Claims (8)

The thin glass substrate which has a 1st main surface and a 2nd main surface, the support glass substrate which has a 1st main surface, and a 2nd main surface, and the resin layer which has easy peelability, and the 1st main surface of the said thin glass substrate and the said support glass substrate The thin glass substrate and the supporting glass substrate are glass laminates laminated through the resin layer so that the resin layer fixed to the first main surface is in close contact,
The said laminated glass substrate is laminated | stacked so that at least one part of the outer periphery of the 1st main surface of the said thin glass substrate may protrude from the outer periphery of the 1st main surface of the said support glass substrate. The first main surface of the thin glass substrate and the first main surface of the supporting glass substrate have a rectangular shape, and the length of each of the length and / or the horizontal length of the first main surface of the thin glass substrate is equal to the above. A glass laminate longer than each of the longitudinal and / or transverse lengths of the first major surface of the supporting glass substrate. The length of each of the length and / or width of the first main surface of the thin glass substrate is 0.2 mm greater than the length of each of the length and / or width of the first main surface of the supporting glass substrate. To 20 mm long glass laminate. The glass laminate according to any one of claims 1 to 3, wherein the entire outer circumference of the first main surface of the thin glass substrate protrudes outward from the outer circumference of the first main surface of the supporting glass substrate. The glass laminate according to any one of claims 1 to 4, wherein the resin forming the resin layer is at least one selected from an acrylic resin, a polyolefin resin, a polyurethane resin, and a silicone resin. The glass laminated body of any one of Claims 1-5 whose thickness of the said resin layer is 5-50 micrometers. The glass laminate according to any one of claims 1 to 6, wherein a difference between the linear expansion coefficients of the thin glass substrate and the supporting glass substrate is 150 × 10 ⁻⁷ / ° C. or less. It is a manufacturing method of the glass laminated body of any one of Claims 1-7, The resin layer formation process of forming and fixing the resin layer which has easy peelability on the 1st main surface of the said support glass substrate, and the said thin glass The manufacturing method of the glass laminated body including the adhesion process which adhere | attaches the said resin layer fixed on the 1st main surface of the said support glass substrate to the 1st main surface of a board | substrate.

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