TWI662323B - Glass film laminated body and manufacturing method of liquid crystal panel - Google Patents

Abstract

The invention provides a glass film laminate and a method for manufacturing a liquid crystal panel, which can improve the operability of a glass film and prevent the occurrence of defective light spots and breakage.

A glass film laminate (1) is a glass film laminate (1) produced by laminating a glass film (10) on a supporting glass (12) that supports a support (11), and only on the glass film (10) The contact surface (10a) side of the support glass (12) is the effective surface (10b) side of the surface on the opposite side, and the chamfered portion (15) is provided on the outer peripheral edge of the glass film (10).

Description

Glass film laminated body and manufacturing method of liquid crystal panel

The present invention relates to a technology for manufacturing a glass film laminate and a liquid crystal panel.

From the standpoint of saving space, in recent years, CRT-type displays, which have been popular in the past, are replaced, and flat-panel displays such as liquid crystal displays, plasma displays, and organic EL displays are spreading.

Next, in these flat panel displays, there is still a demand for thinner.

In recent years, there has been an increasing demand for a substrate or a cover glass used in a device such as a flat panel display to be thinner and more flexible.

The glass substrate is effective in imparting flexibility to the glass substrate, and the following Patent Document 1 proposes a glass film having a thickness of 200 μm or less.

Glass substrates used in electronic devices such as flat-panel displays and solar cells are subjected to various manufacturing-related processes such as processing or cleaning.

However, when glass substrates used in such electronic devices are thinned, since glass is a brittle material, the problem is how much the stress changes. As a result, the glass is broken, and it is very difficult to handle the above-mentioned various electronic device manufacturing-related processes.

In addition, although a glass film having a thickness of 200 μm or less is rich in flexibility, problems such as difficulty in positioning during processing, and deviation in forming a pattern also exist.

In addition, in order to improve the handleability of a thinned glass film, the following Patent Document 1 proposes a glass film laminate in which a glass film is laminated on a supporting glass.

According to this, even if a glass film having no strength or rigidity is used as a single body, the rigidity of the supporting glass is high. Therefore, it is easier to position the entire glass film laminate during processing.

In addition, after the treatment is completed, the glass film can be quickly peeled from the supporting glass without breaking.

If the thickness of the glass film laminate is made the same as that of the previous glass substrate, the electronic device manufacturing line for the previous glass substrate may be shared to manufacture electronic devices.

[Prior technical literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2011-183792

As shown in Patent Document 1, a glass film laminate is used as In the case of a substrate for a liquid crystal panel, there is a rubbing step for a polyimide alignment film coated on a glass film. Next, the problem of the rubbing step is that when the rubbing roller for polyimide alignment film is rubbed in a certain direction, the rubbing roller will wear due to contact with the edge of the glass film, and the broken friction cloth fibers are effectively dispersed in the glass film. On the surface, the defect of defective light spots is caused in the liquid crystal panel.

Therefore, it is expected that the abrasion of the rubbing roller at the time of rubbing the glass film can be prevented and the occurrence of light spot defects can be prevented.

In addition, the problem of the glass film laminate shown in Patent Document 1 is that when the glass film is separated from the supporting glass, when there are fine irregularities on the edge of the glass film, cracks may occur from the irregularities as a starting point. damaged. The fine unevenness is generated when the glass film is cut along the scribe line, and is formed in the formation portion of the scribe line of the cut portion.

Therefore, it is expected that the occurrence of damage during peeling of the glass film can be suppressed, and the yield of the glass film can be improved.

The present invention is conceived in view of such a situation, and an object thereof is to provide a method for manufacturing a glass film laminate and a liquid crystal panel, which can improve the operability of a glass film and prevent the occurrence of light spot defects and damage.

The problem to be solved by the present invention is as described above, and the means for solving this problem will be described next.

The first invention of the present invention is a glass film laminate, which is a glass film laminate produced by laminating a glass film on a support. The contact surface side of the glass film with the support is an effective surface side of a surface on the opposite side, and a chamfered portion is provided on an outer peripheral edge of the glass film.

The second invention of the present case is that the chamfering amount of the chamfered portion is 50% or less of the thickness of the glass film.

The third invention of the present case is that the glass film is formed with a scribed line and is cut along the scribed line, and a surface on the side where the scribed line is formed is selected as the effective surface.

The 4th invention of this case is the said support body is a support glass.

The fifth invention of the present case is that the glass film is directly laminated on the support glass, and the surface roughness Ra of each contact surface where the glass film and the support glass are in contact with each other is 2.0 nm or less.

The sixth invention of the present case is a method for manufacturing a liquid crystal panel, which includes a first step of manufacturing a glass film laminate by laminating a glass film on a support, and a second step of forming a liquid crystal alignment film on the surface of the glass film, including The rubbing step of rubbing the surface of the liquid crystal alignment film with a rubbing roller in a certain direction, the third step of forming a liquid crystal element on the surface of the glass film of the glass film laminate, and manufacturing a liquid crystal panel with a support, and The liquid crystal panel is a method for manufacturing a liquid crystal panel in which the support is peeled off and the fourth step of manufacturing the liquid crystal panel is characterized in that before the second step, only the contact surface side of the glass film with the support is On the effective surface side of the opposite surface, a chamfered portion is formed on the outer peripheral edge of the glass film.

The seventh invention of the present case is that the chamfered amount of the chamfered portion is 50% or less of the thickness of the glass film.

An eighth invention of the present case is that the glass film is formed with a scribed line and is cut along the scribed line, and the side on which the scribed line is formed is selected as the effective surface.

The effects of the present invention are as follows.

According to the first invention of the present application, when a glass film is used as the substrate for a liquid crystal panel, abrasion of the friction roller can be suppressed.

Thereby, when a glass film laminated body is used to manufacture a liquid crystal panel, the occurrence of light spot defects can be suppressed.

According to the second aspect of the present invention, when the glass film is separated from the support, the glass film can be prevented from being damaged.

According to the third aspect of the present invention, it is possible to prevent the chemical solution or the like from penetrating the lower surface of the glass film.

Thereby, it is possible to prevent the glass film and the support from being closely adhered to each other with the chemical solution, and further, to prevent the glass film from being broken during peeling.

According to the fourth invention of the present case, the thermal expansion coefficients of the glass film and the supporting glass can be easily blended, and even after heat treatment during manufacturing-related processing, a glass film laminate that is not easily warped or cracked can be formed.

According to the fifth invention of the present case, the glass film and the supporting glass can be brought into contact with smooth surfaces, so that the adhesiveness is good, and the glass film and the supporting glass can be strongly and stably laminated without using an adhesive.

According to the sixth invention of the present application, a substrate for a liquid crystal panel is used. When a glass film is used, abrasion of the rubbing roller can be suppressed.

Thereby, in a liquid crystal panel using a glass film, it is possible to suppress the occurrence of light spot defects.

According to the seventh invention of the present invention, when the glass film is separated from the supporting glass, the glass film can be prevented from being damaged.

According to the eighth aspect of the present invention, it is possible to prevent the chemical solution or the like from penetrating the lower surface of the glass film.

With this, it is possible to prevent the glass film and the supporting glass from being closely adhered to each other with the chemical solution, and further to prevent the glass film from being broken during peeling.

1‧‧‧ glass film laminate

3‧‧‧ LCD panel

4‧‧‧ LCD panel with supporting glass

10‧‧‧ glass film

10a‧‧‧contact surface

10b‧‧‧Effective

11‧‧‧ support

12‧‧‧ Support glass

12a‧‧‧contact surface

15‧‧‧Chamfer

16‧‧‧line drawing

FIG. 1 is a three-dimensional schematic diagram showing the manufacturing status of the glass film laminate.

FIG. 2 is a schematic side sectional view showing a method for manufacturing a glass film (overflow downdraw method).

FIG. 3 is a schematic diagram for explaining a bonding mechanism between a glass film and a supporting glass, (a) illustrates a state of hydrogen bonding of hydroxyl groups, and (b) illustrates a state of hydrogen bonding between water molecules.

FIG. 4 is a schematic diagram showing another embodiment of the glass film laminate.

Fig. 5 is a schematic side view of a glass film laminate according to an embodiment of the present invention, (a) when the chamfered portion is C-chamfered, and (b) when the chamfered portion is R-chamfered (C) When the chamfer amount is 50% or less.

Fig. 6 is a schematic side view of a glass film laminate, (a) When the line-side surface is used as the contact surface, (b) is a case where a chamfered portion is provided on the contact surface side, and (c) is a case where the chamfered amount exceeds 50%.

7 is a schematic side view of a method for manufacturing a liquid crystal panel according to an embodiment of the present invention.

FIG. 8 is a schematic side view of a liquid crystal panel with a supporting glass.

FIG. 9 is a graph comparing and comparing the experimental results of the number of occurrences of defects caused by the difference in the formation condition of the chamfered portion.

Hereinafter, the best embodiment of the glass film laminate of the present invention will be described with reference to the drawings.

As shown in FIG. 1, a glass film laminate 1 according to an embodiment of the present invention is produced by laminating a glass film 10 and a support 11.

The glass film 10 is made of silicate glass, preferably quartz glass, borosilicate glass, and alkali-free glass.

When the glass film 10 contains an alkali component, cations fall off on the surface, so-called cation replacement phenomenon occurs, and the structure becomes coarse. In this case, when the glass film 10 is bent and used, it may be damaged from a roughened portion as it ages.

The term "alkali-free glass" used herein refers to glass that does not substantially contain an alkali component (alkali metal oxide), and specifically, a glass having an alkali component of 3000 ppm or less.

The alkali component content of the alkali-free glass used in the present invention is 1000 ppm The following are preferred, more preferably below 500 ppm, and most preferably below 300 ppm.

The thickness of the glass film 10 is preferably 300 μm or less, more preferably 5 to 200 μm, and most preferably 5 to 100 μm.

Thereby, the thickness of the glass film 10 can be made thinner, and appropriate flexibility can be provided.

Although the glass film 10 having a thinner thickness is prone to problems such as operability difficulties, positioning failure, and deflection during patterning, it is possible to easily perform processing related to electronic devices and the like by using a support 11 described later.

When the thickness of the glass film 10 is less than 5 μm, there is a concern that the strength of the glass film 10 may be insufficient and the glass film 10 may be difficult to peel from the support 11.

The material of the support 11 is not particularly limited as long as it can support the glass film 10, and a synthetic resin plate, a natural resin plate, a wood board, a metal plate, a glass plate, a ceramic plate, a crystallized glass plate, or the like can be used. In addition, the thickness of the support body 11 is also not particularly limited, and an appropriate thickness of the support body 11 may be selected in accordance with the rigidity of the material selected as the support body. When the purpose is to improve the operability of the glass film 10 or the like, a resin film such as a PET film may be used.

As shown in FIG. 1, the supporting body 11 is preferably a supporting glass 12. Thereby, even if heat treatment is performed during the processing related to the manufacture of the electronic device, thermal bending due to the difference in expansion coefficient, cracking of the glass film 10, and the like are less likely to occur, and the stable laminated state of the glass film laminate 1 can be maintained.

As for the support glass 12, similarly to the glass film 10, silicate glass, quartz glass, borosilicate glass, alkali-free glass, etc. are used.

For the supporting glass 12, it is preferable to use glass having a difference in thermal expansion coefficient between the glass film 10 and 30 × 380 ° C. within 5 × 10 ^-7 / ° C.

Next, from the viewpoint of suppressing the difference in expansion coefficient, it is preferable to use glass having the same composition as the support glass 12 and the glass film 10.

The thickness of the support glass 12 is preferably 400 μm or more. When the thickness of the support glass 12 is less than 400 μm, there is a concern that a problem may occur in terms of strength when the support glass 12 is handled by a single body. The thickness of the supporting glass 12 is preferably 400 to 700 μm, and most preferably 500 to 700 μm.

Accordingly, the supporting glass 12 can surely support the glass film 10, and the glass film 10 can be effectively prevented from being damaged when the glass film 10 is peeled from the supporting glass 12.

When the liquid crystal alignment film is applied, when the glass film laminate 1 is placed on a positioner (not shown), the thickness of the support glass 12 may be less than 400 μm (for example, 300 μm, etc., the same thickness as the glass film 10). .

The glass film 10 and the support glass 12 used in this embodiment are better formed by the down-draw method, and more preferably formed by the overflow down-draw method.

In particular, the overflow down-draw method shown in FIG. 2 is a molding method in which the double-sided glass plate is not brought into contact with the molding member during molding, and it is not easy to obtain the double-sided (light-transmitting surface) of the obtained glass plate. Scratches occur, and high surface grades can be obtained without polishing. Of course, the glass film 10 and the supporting glass 12 used in the present invention may also be floated out or floated down. Method, vertical pull-in method, re-extension method, etc.

In the overflow down-draw method shown in FIG. 2, the glass ribbon (G-ribbon) G immediately after flowing down from the lower end portion 21 of the formed body 20 having a wedge-shaped cross-section is cooled down by the cooling roller 22 while being restricted in the width direction. The bottom is stretched until thin to the specified thickness. Next, the glass ribbon G having a predetermined thickness is gradually cooled in an annealing furnace (not shown) to remove the thermal deformation of the glass ribbon G, and the glass ribbon G is cut to a predetermined size, so that the glass The film 10 and the support glass 12 are respectively formed.

Hereinafter, an embodiment in which the supporting glass 12 is used as the supporting body 11 will be described. For parts other than the specific explanation due to the material of the supporting glass 12, the term supporting glass 12 may be replaced with the supporting body 11 as appropriate.

As shown in FIG. 1, in the glass film 10, a contact surface 10 a and an effective surface 10 b are set.

The contact surface 10 a is a surface on the side opposite to and in contact with the support glass 12 when it is laminated with the support glass 12.

The effective surface 10b is a surface on the opposite side to the contact surface 10a, and is a surface on the side subjected to manufacturing-related processing such as element formation.

Although not shown here, chamfered portions are formed in the peripheral portion of the glass film 10. The chamfered portion will be described in detail in a subsequent paragraph.

As shown in FIG. 1, a contact surface 12 a and a conveying surface 12 b are set on the support glass 12.

The contact surface 12 a is a surface on the side opposite to and in contact with the glass film 10 when laminated with the glass film 10.

In addition, the conveying surface 12b is a surface opposite to the contact surface 12a, and When the glass film laminated body 1 is conveyed on a conveying roller, it is connected to the surface on the side of the conveying roller.

In FIG. 1, a glass film 10 having a substantially the same area is laminated on the supporting glass 12. However, the supporting glass 12 may be laminated so as to protrude from the glass film 10.

In this case, the excess of the supporting glass 12 from the glass film 10 is preferably 0.5 to 10 mm, and more preferably 0.5 to 1 mm.

The excess amount of the support glass 12 is reduced, and the area of the effective surface 10 b of the glass film 10 can be ensured to be further enlarged.

In addition, in the glass film laminated body 1, it is preferable that all of the four sides are covered so that the supporting glass 12 extends beyond the glass film 10.

The step of laminating the glass film 10 on the support glass 12 may be performed under reduced pressure. Thereby, even if bubbles occur during lamination, bubbles increase in the subsequent decompression and vacuum steps, and as a result, defects such as glass breakage in the vacuum step can be prevented.

The surface roughness Ra of the contact surface 10a of the glass film 10 and the contact surface 12a of the support glass 12 is preferably 2.0 nm or less. Thereby, the glass film and the supporting glass can be brought into contact with smooth surfaces, so that the adhesiveness is good, and the glass film and the supporting glass can be firmly and stably laminated even without using an adhesive.

In order to strongly laminate the glass film 10 and the support glass 12 without an adhesive, the surface roughness Ra of each contact surface 10a, 12a of the glass film 10 and the support glass 12 used in the present invention is preferably 1.0 nm or less, It is more preferably below 0.5 nm, and most preferably below 0.2 nm.

In the present embodiment, the surface roughness Ra of the surface on the side where the glass film 10 and the support glass 12 are in contact with each other is set to 2.0 nm or less. In the first step, the surface roughness of the surface on the side where the glass is in contact with each other is set. A glass film 10 and a support glass 12 each having a Ra of 2.0 nm or less are laminated, and the glass film 10 is firmly fixed against the support glass 12 to produce a glass film laminate 1.

When the surface roughness Ra of each contact surface 10a, 12a of the glass film 10 and the support glass 12 is smoothed to 2.0 nm or less, when the two smooth glass substrates are closely adhered, the glass substrates are tightened without an adhesive. The glass film laminated body 1 was formed so that it might peel. This phenomenon is speculated according to the following mechanism.

It is considered that, as shown in FIG. 3 (a), the surfaces of the glass film 10 (the contact surface 10 a) and the surface of the support glass 12 (the contact surface 12 a) are attracted to each other by the hydrogen bonds of the hydroxyl groups. Alternatively, as shown in FIG. 3 (b), the glass film 10 and the support glass 12 can be closely adhered to each other by interposing the water molecules existing at the interface 13 between the glass film 10 and the support glass 12 to form hydrogen bonds.

In this embodiment, the glass film 10 is directly laminated on the support glass 12. However, as shown in FIG. 4, a resin layer 14 may be laminated between the glass film 10 and the support glass 12. Since the glass film 10 will eventually be peeled off, the resin layer 14 is preferably made of a slightly adhesive material. As the resin layer 14, polyethylene, polyvinyl chloride, polyethylene terephthalate, polyvinylidene chloride, polypropylene, polyvinyl alcohol, polyester, polycarbonate, polystyrene, polyacrylonitrile, Ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, ethylene-methacrylic acid copolymer, nylon, celluloid Cellophane, silicone resin, etc .; the resin layer 14 can be used only for the base material when the material itself is tacky, or coated on both sides of the base material with an additional adhesive, or there is no base material and only the adhesive layer .

On the other hand, the surface roughness of the effective surface 10b of the glass film 10 or the surface roughness of the transport surface 12b of the support glass 12 is not particularly limited.

That is, regarding the glass film laminated body 1 of this embodiment, the support glass 12 is used as the support body 11.

According to such a structure, the thermal expansion coefficients of the glass film 10 and the support glass 12 can be easily adjusted, and even after the heat treatment during the manufacturing-related processing, the glass film laminate 1 that is not easily warped or cracked can be formed.

In addition, regarding the glass film laminate 1 of this embodiment, the glass film 10 is directly laminated on the support glass 12, and the surface roughness Ra of the respective contact surfaces 10 a and 12 a of the glass film 10 and the support glass 12 that are in contact with each other is 2.0nm or less.

With such a structure, the glass film 10 and the supporting glass 12 can be brought into contact with each other on a smooth surface, so that the adhesiveness is good, and the glass film 10 and the supporting glass 12 can be strongly and stably laminated without using an adhesive.

Next, the formation of the chamfered portion of the glass film laminate 1 according to an embodiment of the present invention will be described with reference to FIGS. 5 and 6.

As shown in FIG. 5 (a) and (b), regarding the glass film laminate 1 according to this embodiment, in order to prevent the abrasion of the friction cloth, the edge portion (peripheral portion) of the glass film 10 which is the main factor of abrasion is formed Chamfer 15

The chamfered portion 15 faces the glass film 10, and the peripheral portion is chamfered by a method such as grinding. As the method of forming the chamfered portion 15, a mechanical chamfering method using a grinding stone, a grinding stone, a grinding belt, or the like, a chemical chamfering method using hydrofluoric acid, or the like, a burner or a laser can be used. Chamfering method by radiating heat.

In addition, the chamfered portion 15 can be a C-chamfered type (chamfered angle of 45 degrees) as shown in FIG. 5 (a), or an R-chamfered type as shown in FIG. 5 (b). state.

In addition, the chamfered portion 15 is not limited to a C-chamfered or R-chamfered shape, and a combination of a C-chamfered and R-chamfered shape or a shape other than 45 degrees may be used. Various types.

The chamfered portion 15 of the glass film laminate 1 is configured to be formed only on the effective surface 10 b side of the glass film 10.

Furthermore, regarding the glass film laminate 1 of this embodiment, it is preferable to select the drawing surface 16 side of the glass film 10 as the effective surface 10b as shown in FIGS. 5 (a) (b) (c). A chamfered portion 15 is formed on a peripheral edge portion on the drawing surface 16 side.

The term “line drawing surface” used herein refers to a surface formed on the side of the above-mentioned drawing line by forming a cutting line (engraving line) for cutting and a glass film cut along the drawing line.

FIG. 6 (a) shows a glass film laminate 1 a in which a chamfered portion 15 is formed only on the effective surface 10 b side of the glass film 10 as a glass film laminate according to an embodiment of the present invention.

However, for the glass film laminate 1a, the drawing of the glass film 10 is selected. The surface 16 side is the contact surface 10a, which is different from the glass film laminate 1 shown in FIG. 5 (a) (b) (c) in this point.

With regard to the glass film laminate 1a, as shown in FIG. 6 (a), the effective surface 10b is processed or cleaned by drawing a line mark formed on the end of the line drawing surface 16 of the glass film 10. The chemical solution or the like used for the permeation is permeated, and an infiltration part 17 of the chemical solution or the like is formed at the interface 13 between the glass film 10 and the support glass 12. In this way, when the infiltration portion 17 is formed at the interface 13 between the glass film 10 and the support glass 12, the glass film 10 and the support glass 12 are closely adhered due to the chemical solution or the like of the infiltration portion 17, and when the glass film 10 is peeled off, The glass film 10 may be damaged.

That is, in the glass film laminate 1a, although the chamfered portion 15 can be used to prevent abrasion of the rubbing cloth, the glass film 10 may be damaged when the glass film 10 is peeled. Therefore, it can be said that the glass film laminate 1 shown in FIG. 5 (a) is a better type than the glass film laminate 1a.

That is, in the glass film laminate 1 according to this embodiment, the glass film 10 is formed with a scribe line and is cut along the scribe line. The scribe line surface 16 on the side where the scribe line is formed is selected as the effective surface. 10b.

With such a configuration, it is possible to prevent the chemical solution from being impregnated into the lower surface of the glass film 10. Thereby, it is possible to prevent the glass film 10 and the support body 11 from being brought into close contact with each other with the chemical solution, and further to prevent the glass film 10 from being broken during peeling.

6 (b) illustrates a glass film laminate 1b in which the chamfered portion 15 is formed on the contact surface 10a side.

With respect to the glass film laminate 1b, as the chamfered portion 15 is allowed to permeate the chemical solution or the like used in processing or cleaning the effective surface 10b, On the interface 13 between the glass film 10 and the support glass 12, an infiltration portion 17 such as a chemical solution is formed. Since the glass film 10 and the support glass 12 are in close contact with each other in the infiltration portion 17, the glass film 10 is improved when the glass film 10 is peeled off. The possibility of damage. In addition, in the aspect shown in FIG. 6 (b), the chamfered portion 15 cannot be used to prevent abrasion of the friction cloth.

Therefore, the glass film laminates 1 and 1a according to the embodiment do not include the glass film laminates of the type in which the chamfered portions 15 are formed on the contact surface 10a side as shown in FIG. 6 (b). 1b, or the shape of the chamfered portions 15, 15 formed on both the contact surface 10a and the effective surface 10b of the glass film 10.

That is, the glass film laminate 1 according to this embodiment is a laminate made by laminating the glass film 10 on the support 11; only on the contact surface 10a side of the glass film 10 and the support 11 is On the side of the effective surface 10 b of the surface on the opposite side, a chamfered portion 15 is provided on the outer peripheral edge of the glass film 10.

Furthermore, regarding the glass film laminate 1 according to this embodiment, it is preferable that the chamfered amount of the chamfered portion 15 be 50% or less of the thickness of the glass film 10.

As shown in FIG. 5 (c), in the glass film laminate 1, the chamfering amount H of the chamfered portion 15 is set to 50% or less of the thickness d of the glass film 10.

On the other hand, as for the glass film laminate 1c shown in FIG. 6 (c), as with the glass film laminate 1, the chamfered portion 15 is formed only on the effective surface 10b side of the glass film 10. .

The glass film laminate 1c is similar to the glass film laminate 1 in that the drawing line 16 side of the glass film 10 is selected as the effective surface 10b.

However, in the glass film laminate 1c, the chamfering amount H of the chamfered portion 15 When it exceeds 50% of the thickness d of the glass film 10, it is different from the glass film laminate 1.

In this case, when the glass film 10 is peeled from the support glass 12, a part of the bending stress acting on the chamfered portion 15 will be applied to the tensile direction. Because of the bending stress, there is a slight presence of the chamfered portion 15. Fragmentation of the starting point is the worry of breakage.

In the glass film laminate 1c having such a structure, although the chamfered portion 15 can be used to prevent abrasion of the rubbing cloth, the glass film 10 may be damaged when the glass film 10 is peeled.

Therefore, it can be said that the glass film laminate 1 shown in FIG. 5 (c) is a better type than the glass film laminate 1c.

With respect to the glass film laminate 1, when the glass film 10 is peeled from the support glass 12, a part of the bending stress acting on the chamfered portion 15 acts on the compression direction, and the bending stress can suppress the cause of the chamfering. Damage such as minute chipping in the portion 15 occurs.

In addition, if the surface roughness of the chamfered portion 15 is small, the effect of reducing the abrasion of the friction cloth or the effect of preventing damage due to chipping will increase. Therefore, it is desirable to minimize the surface roughness of the chamfered portion 15 .

That is, in the glass film laminate 1 according to this embodiment, the chamfering amount H of the chamfered portion 15 is 50% or less of the thickness d of the glass film 10 (that is, H ≦ d / 2).

With such a configuration, the glass film 10 can be prevented from being damaged when the glass film 10 and the support 11 are separated.

Secondly, with regard to a liquid crystal panel according to an embodiment of the present invention, A method for manufacturing the plate will be described with reference to FIGS. 7 and 8.

Regarding the manufacturing method of the liquid crystal panel 3 of this embodiment, the glass film laminate 1 is manufactured by laminating the glass film 10 and the support 11 in the first step as shown in FIG. 7. In addition, in the aspect of this embodiment, the glass film laminate 1 in the form of a liquid crystal panel 3 formed on the glass film 10 is referred to as a liquid crystal panel 4 with a supporting glass. In other words, if the support glass 12 is peeled off and removed from the liquid crystal panel 4 with the support glass, it is the liquid crystal panel 3 (see FIG. 7).

In the second step, the glass film laminate 1 is coated on the glass film 10 with a liquid crystal alignment film 31 made of a polyimide material.

Regarding the third step of the method for manufacturing the liquid crystal panel 3 in this embodiment, as shown in FIG. 7, when the liquid crystal panel 4 with a supporting glass is manufactured, the liquid crystal alignment of the glass film 10 is rubbed with the rubbing roller 5 in a certain direction. The film 31 aligns liquid crystal molecules in a predetermined direction.

The friction roller 5 is a roller-shaped member provided on the roller surface with a conductive material made of regenerated cellulose fiber and the like. The roller is configured to be rotatable around a roller axis, and is capable of rotating in a predetermined direction and at the same time. The liquid crystal alignment film 31 is rubbed in a certain direction.

The liquid crystal alignment film 31 is aligned in a certain direction by rubbing the rubbing roller 5 in a certain direction.

In this way, the friction roller 5 is provided with a roller surface composed of regenerated cellulose fibers and the like. Therefore, when the frictional force when rubbing the liquid crystal alignment film 31 is locally excessively exerted on the edge portion of the glass film 10 or the like, The fiber has a property of abrasion and breakage at the excessively applied force.

Regarding the manufacturing method of the liquid crystal panel 3 in this embodiment, the formation of the chamfered portion 15 may be performed until the third step (that is, the rubbing step) is performed, or before the first step, or before the first step. Perform between step 2 and step 2. In other words, after the chamfered portion 15 is formed in the state of the glass film 10, the glass film 10 on which the chamfered portion 15 is formed may be laminated on the support glass 12 by performing the first step. In this case, the chamfered portion 15 can be easily formed in the glass film 10. Alternatively, after the glass film laminate 1 after the first step is manufactured, the chamfered portion 15 may be formed by chamfering only the glass film 10 laminated on the support glass 12. In this case, it is possible to prevent the glass frit generated during the chamfering from causing bubbles during lamination.

In this way, by forming the chamfered portion 15 on the effective surface 10b side of the glass film 10, it is possible to prevent the frictional force generated between the friction roller 5 and the edge portion of the glass film 10 from being excessive during the rubbing step, thereby It is possible to prevent the friction cloth constituting the friction roller 5 from being worn out and broken.

In the third step, as shown in FIG. 8, the liquid crystal alignment film 31 that is aligned by friction is sealed on the color filter-side glass substrate 6 and the liquid crystal is injected (not shown). A liquid crystal element 32 is formed on the glass film 10.

In the aspect shown in FIG. 8, although the color filter-side glass substrate 6 and the glass film 10 are directly adhered, a known glass frit, a spacer, or the like may be used for adhesion as appropriate. The color filter-side glass substrate 6 and the glass film 10. In addition, in the form shown in FIGS. 7 and 8, the supporting glass 12 (supporting body) is also used for the color filter-side glass substrate 6. 11). In addition, the glass film laminated body of the laminated color filter-side glass substrate 6 and the supporting glass 12 (supporting body 11) used in this embodiment also has the same configuration as the glass film laminated body 1 of the present invention. .

As the substrate used for sealing the liquid crystal element 32, similar to the aforementioned glass film 10, a color filter-side glass substrate 6 made of silicate glass, quartz glass, borosilicate glass, alkali-free glass, or the like can be used.

For the color filter-side glass substrate 6, it is preferable to use glass having a difference in thermal expansion coefficient between the glass film 10 and 30 × 380 ° C. within 5 × 10 ^-7 / ° C.

Thereby, even if the ambient temperature of the manufactured liquid crystal panel 3 is changed, thermal bending due to the difference in expansion coefficient, cracking of the glass film 10 and the color filter-side glass substrate 6 and the like are unlikely to occur, and it is possible to make it difficult to break. The LCD panel 3.

Next, from the viewpoint of suppressing the difference in expansion coefficient, it is preferable to use glass having the same composition as the color filter-side glass substrate 6 and the glass film 10.

The thickness of the color filter-side glass substrate 6 is preferably 300 μm or less, more preferably 5 to 200 μm, and most preferably 5 to 100 μm. Thereby, the thickness of the color filter-side glass substrate 6 can be made thinner, and appropriate flexibility can be provided. When the thickness of the color filter-side glass substrate 6 is less than 5 μm, the strength of the color filter-side glass substrate 6 may be insufficient.

As shown in FIG. 7, regarding the manufacturing method of the liquid crystal panel 3 of this embodiment, in a fourth step, the liquid crystal panel with a supporting glass will be The support glass 12 and the glass film 10 of 4 are peeled off to produce the liquid crystal panel 3 of the glass film 10 in the form of the liquid crystal element 32.

The fourth step of the method for manufacturing the liquid crystal panel 3 of this embodiment mode is a step of separating the liquid crystal panel 4 with supporting glass into a liquid crystal panel 3 (glass film 10) and a supporting glass 12.

For example, when the liquid crystal panel 3 is peeled from the support glass 12, the end of the glass film 10 can be faced from the support glass by inserting a wedge (not shown) at the interface 13 between the glass film 10 and the support glass 12. 12 Stretch in the direction of separation to peel. When the support glass 12 is also present on the color filter-side glass substrate 6, the support glass 12 and the color filter-side glass substrate 6 can be peeled off by the same method.

In this way, regarding the manufacturing method of the liquid crystal panel 3 according to this embodiment, there is a first step of manufacturing a glass film laminated body 1 by laminating a glass film 10 on a supporting glass 12 that satisfies the supporting body 11, and The second step of forming the liquid crystal alignment film 31 on the surface of the film 10 includes a rubbing step of rubbing the surface of the liquid crystal alignment film 31 with a rubbing roller 5 in a certain direction, and forming liquid crystal on the surface of the glass film 10 of the glass film laminate 1 Element 32, which is the third step to produce a liquid crystal panel 4 with a supporting glass that meets a liquid crystal panel with a supporting body, and peels the supporting glass 12 from the liquid crystal panel 4 with a supporting glass to produce a liquid crystal such as the fourth step of the liquid crystal panel 3. Method for manufacturing panel 3; before the second step, only the effective surface 10b side of the surface of the glass film 10 opposite to the contact surface 10a side of the supporting glass 12 is formed to form a chamfer on the outer peripheral edge of the glass film 10 Department 15 to make.

Next, with such a configuration, when the glass film 10 is used as a substrate for a liquid crystal panel, the abrasion of the friction roller 5 can be suppressed.

Thereby, when the liquid crystal panel 3 is manufactured using the glass film laminated body 1, it is possible to suppress the occurrence of light spot defects.

Next, the occurrence of defects in the case where a liquid crystal panel is manufactured using the glass film laminate according to an embodiment of the present invention will be described with reference to FIG. 9.

Fig. 9 is a summary of the occurrence of defects under various conditions when changing the conditions such as the presence or absence of chamfered portions, the amount of chamfered portions, the formation status of the chamfered portions, and the setting status of the effective surface. number.

In each of the examples and comparative examples described below, as the glass film and supporting glass, alkali-free glass (product name: OA-10G) manufactured by Nippon Electric Glass Co., Ltd. was used.

In addition, the glass film is a glass film with a size of 368 × 468 and a thickness of 0.2t; the support glass uses a support glass with a size of 370 × 470 and a thickness of 0.5t.

Each of the glass film laminates of Examples 1 to 3 corresponds to the glass film laminate of the present invention, and a chamfered portion is formed at the peripheral edge portion of the glass film.

The chamfered part is C-chamfered by using a disc millstone of the number # 2000 to make an angle of 45 degrees.

On the other hand, the glass film laminate of Comparative Example 1 does not form a chamfered portion at the peripheral edge portion of the glass film, and does not correspond to the present invention. Mingzhi glass film laminate.

In addition, regarding the glass film laminate of Comparative Example 1, the drawing surface was selected as the effective surface of the glass film.

Regarding the glass film laminate of Example 1, a drawing line was selected as the effective surface of the glass film, a chamfered portion was formed on the peripheral edge portion of the effective surface side, and the chamfered amount was set to the thickness of the glass film (200 μm). The amount is less than 50% of 90 μm.

The glass film laminate of Example 1 corresponds to the glass film laminate 1 described above.

Regarding the glass film laminate of Example 2, the surface opposite to the line drawing surface was selected as the effective surface of the glass film, and a chamfered portion was formed on the peripheral edge portion of the effective surface side, and the chamfering amount was set. It is 90 μm in an amount of 50% or less of the thickness of the glass film. Next, regarding each of the glass film laminates of Example 2, a drawing surface is selected as the contact surface.

The glass film laminate of Example 2 corresponds to the aforementioned glass film laminate 1a.

Regarding the glass film laminate of Example 3, the drawing surface was selected as the effective surface of the glass film, and a chamfered portion was formed on the peripheral edge portion of the effective surface side, and the chamfering amount was set to 50 which exceeds the thickness of the glass film. The amount in% is 110 μm.

The glass film laminate of Example 3 corresponds to the aforementioned glass film laminate 1c.

Next, for each of the glass film laminates of Examples 1 to 3 and Comparative Example 1, 20 samples were prepared and introduced into a liquid crystal display. The manufacturing steps of the device are shown, and it is confirmed whether a chemical solution permeates the interface of the glass film layered body, and whether friction cloth generates dust during the rubbing step.

In addition, for each of the 20 samples, it was confirmed whether the glass film was broken when the glass film was peeled from the support glass.

According to the experimental results shown in FIG. 9, regarding the glass film laminate of Comparative Example 1, the result of “dust generation due to friction” was that all 20 samples occurred.

On the other hand, according to the experimental results shown in FIG. 9, regarding the glass film laminate of Example 1, in all of the 20 samples, “breakage during peeling”, “dust generation due to friction”, and “permeation of chemical liquid” Neither defect, such as "damage caused by it".

In addition, regarding the glass film laminate of Example 2, as a result, although "the generation of dust by friction" was not detected in all 20 samples, "breakage during peeling" was observed in 2 of 20 samples. "The damage caused by the penetration of the medicinal solution" occurred in 5 of the 20 samples.

In addition, regarding the glass film laminate of Example 3, as a result, "dust generation due to friction" and "breakage caused by penetration of the medicinal solution" did not occur in all 20 samples, but "breakage during peeling" was It happened 5 out of 20 samples.

That is, according to the results of this experiment, regarding each of the glass film laminates (that is, each glass film laminate 1) of Examples 1 to 3, "dust generation due to friction" can be reliably prevented.

That is, it can be confirmed that by providing a peripheral edge portion on the effective surface side of the glass film Setting the chamfered portion can effectively prevent dust from being generated by the friction cloth in the friction step.

In addition, according to the results of this experiment, regarding the glass film laminate (that is, the glass film laminate 1) of Example 1, it is possible to reliably prevent "damage due to penetration of a chemical solution" and "damage during peeling".

That is, it can be confirmed that by selecting a line drawing surface as the effective surface of the glass film and setting the chamfer amount to 50% or less of the thickness of the glass film, it is possible to effectively suppress breakage at the time of peeling and realize the output of the glass film. Rate increase.

Claims (6)

A glass film laminate is a glass film laminate produced by laminating a glass film on a support. The glass film laminate is characterized in that the support and the glass film are peelably laminated, and the support is only between the glass film and the support. The contact surface side of the body is the effective surface side of the surface on the opposite side, and a chamfered portion is provided on the outer periphery of the glass film; the glass film is formed with a scribe line, and is cut along the scribe line, and the scribe line is selected to be formed. The side surface is used as the effective surface. The glass film laminate according to item 1 of the scope of the patent application, wherein the chamfered amount of the chamfered portion is 50% or less of the thickness of the glass film. The glass film laminate according to item 1 or 2 of the scope of patent application, wherein the aforementioned support system supports glass. For example, the glass film laminate according to item 3 of the scope of the patent application, wherein the glass film is directly laminated on the support glass, and the surface roughness Ra of each contact surface where the glass film and the support glass are in contact with each other is 2.0. nm or less. A method for manufacturing a liquid crystal panel includes a first step of laminating a glass film on a support to produce a glass film laminate, and a second step of forming a liquid crystal alignment film on the surface of the glass film, including using a rubbing roller to The rubbing step of rubbing the surface of the liquid crystal alignment film in a certain direction, the third step of forming a liquid crystal element on the surface of the glass film of the glass film laminate, manufacturing a liquid crystal panel with a support body, and the liquid crystal from the support body The panel is a method for manufacturing a liquid crystal panel in which the support is peeled off and the fourth step of manufacturing a liquid crystal panel is characterized in that the glass film is formed with a engraved line and cut along the engraved line. Before the second step, only The contact surface side of the glass film with the support is the effective surface side of the opposite surface, and a chamfered portion is formed on the outer periphery of the glass film; the surface of the glass film on the side where the scribed line is formed is selected as the foregoing. Effective surface. For example, the method for manufacturing a liquid crystal panel according to item 5 of the scope of patent application, wherein the chamfered amount of the chamfered portion is 50% or less of the thickness of the glass film.