JP3315063B2 - Printing plate for forming a thin film and method for forming a thin film using the printing plate for forming a thin film - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing plate for forming a thin film, for example, by pressing an alignment liquid supplied to the surface to form a thin film with a constant thickness, and a method for forming a thin film using the printing plate for forming a thin film. .

[0002]

2. Description of the Related Art Conventionally, in a process of manufacturing a liquid crystal panel,
As a method for forming an alignment film on a glass substrate, it is known to form an alignment film on a glass substrate using a printing plate for forming a thin film having a plurality of projections formed on the surface.

[0003] A pair of glass substrates on which a thin film such as an alignment film is formed are bonded to each other with a sealing agent applied to the periphery of the pair of glass substrates with the surfaces on which the alignment film or the like is formed at intervals of about 5 to 10 µm. Then, a liquid crystal is injected into a gap between the pair of glass substrates to complete a liquid crystal panel.

In the method of forming an alignment film using a printing plate for forming a thin film as described above, the printing plate for forming a thin film is mounted on a cylindrical printing plate cylinder. That is, when forming an alignment film, an alignment liquid is supplied to a printing plate for thin film formation attached to the cylindrical printing plate cylinder, and the printing liquid is rotated about the long axis of the printing plate cylinder. Then, the printing plate for forming a thin film is pressed against a glass substrate.

In other words, in this method, the alignment liquid stays in a recess provided between a plurality of projections formed on the surface of the printing plate for forming a thin film. Is transferred onto the glass substrate by being pressed against the glass substrate. At this time, the glass substrate is sent while maintaining a predetermined pressing pressure against the printing plate for forming a thin film, so that an alignment film having a constant thickness is transferred to the surface.

[0006]

However, in the method of forming an alignment film as described above, in the method of forming the alignment film, the printing plate cylinder is held at a predetermined rotation speed and a predetermined pressing pressure on the printing plate for forming a thin film. Since the liquid is transferred, a defect occurs in the alignment film transferred to the glass substrate.

In other words, in the method of forming an alignment film as described above, when the printing plate for forming a thin film is tilted, the alignment liquid staying substantially at the center flows toward the edge. When the alignment liquid flows to the edge in this manner, the amount of the alignment liquid that remains at the edge of the printing plate for forming a thin film increases, and a liquid pool is generated. Therefore, on the glass substrate to which the alignment liquid retained on such a thin film forming printing plate has been transferred, FIG.
As shown in FIG. 9, a portion where the thickness of the alignment film 51 is large at the edge portion 50 occurs. Further, in the method of forming the alignment film 51 as described above, a lump of the alignment liquid is locally generated at the edge portion 50.

According to FIG. 19, the alignment film 51 formed by the above-described method has a thickness of about 120 nm to about 1 nm at the edge 50 even if it is about 80 nm.
It is presumed to be formed with a thickness of 50 nm.

The edge 5 of the alignment film 51 thus formed
If the film thickness is too large at 0, when the pair of glass substrates are opposed to each other and bonded with a sealant, the adhesive strength of the sealant is weakened, and the defective rate is increased.

Further, an edge 50 of the formed alignment film 51 is formed.
If a lump of alignment liquid is generated in the glass substrate, the defective rate of the manufactured glass substrate is further increased. This alignment film 51
The defect rate due to non-uniform film thickness corresponds to about half of the defect rate, for example, as shown in FIG. 20, and is about 0.23%.

Accordingly, the present invention has been proposed in view of the above-mentioned circumstances, and a printing plate for forming a thin film in which the film thickness does not increase even at the edge of the formed thin film, and this thin film An object of the present invention is to provide a method for forming a thin film using a printing plate for forming.

[0012]

A printing plate for forming a thin film according to the present invention is a printing plate for forming a thin film having a rectangular shape in which a plurality of projections are formed on one surface. Is a rectangular first region in which the protrusions are formed at a predetermined density defined by the number of protrusions per unit area, and the protrusions are formed at a density lower than the predetermined density. 1
And a second region formed on an edge portion so as to surround the region. A plurality of convex portions are formed in the first region and the second region at a predetermined angle with respect to the short side of the rectangular shape. It is characterized by being formed in an array.

In the printing plate for forming a thin film thus configured, since the density of the convex portions formed in the second region is lower than that in the first region, a liquid is supplied between the convex portions to form the first plate. Even if the liquid retained in the area flows into the second area, a large amount of liquid does not remain at the edge.

Further, in the method of forming a thin film according to the present invention, a plurality of protrusions are formed on one surface, and the protrusions are formed at a predetermined density defined by the number of protrusions per unit area. A first region having a rectangular shape, and a second region formed at an edge to surround the first region, wherein the convex portion is formed at a density lower than the predetermined density. A coating liquid is supplied to a printing plate for thin film formation in which a plurality of convex portions are arranged and formed in the first region and the second region at a predetermined angle with respect to the short side of the rectangular shape, and the printing plate for thin film formation is provided. Is pressed against an object to be coated with the coating liquid.

According to such a thin film forming method, when the coating liquid is supplied to the printing plate for forming a thin film and pressed against an object to be coated, the coating liquid retained between the convex portions of the first area is applied to the second area. On the other hand, even when the coating liquid flows, the coating liquid does not stay in the liquid in a large amount, and the thickness of the edge portion of the formed thin film does not become larger than that of the center portion.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a printing plate for forming a thin film according to the present invention and a method for forming a thin film using the printing plate for forming a thin film will be described with reference to the drawings.

As shown in FIG. 1, the printing plate 1 for forming a thin film includes a base film 2 and a resin portion 3 formed on the veil film 2.

The base film 2 has a thickness of about 100 μm
A polyester film having a thickness of about 200 μm, and a photoreactive adhesive is applied to one surface. The base film 2 has a property of improving adhesiveness when irradiated with light.

The resin portion 3 is a photosensitive resin formed on the veil film 2. The resin portion reacts when irradiated with ultraviolet light, and only the portion irradiated with ultraviolet light is photochemically cured from a liquid to become a solid. In addition, as this resin part 3, for example, APR resin can be used.

A plurality of protrusions 3b are formed on the surface 3a of the resin portion 3 as shown in FIG. Y. (Tomomi Yamagata) The pattern is composed. That is, the first region 4 in which the convex portion 3b is formed at a predetermined density at a substantially central portion on the surface 3a of the resin portion 3,
And the second region 5 in which the protrusions 3b are formed at a lower density than the region. The second region is formed at the edge so as to surround the first region. The convex portion 3b is provided in the first region 4
For example, 400 pieces per square inch are formed, and about 200 pieces per square inch are formed in the second region 5, for example.

As shown in FIG. 2, the projections 3b are arranged at an angle of about 75 degrees with respect to the short side of the rectangular thin-film printing plate 1.

The width t ₁ of the second region 5 is about 15 μm
It is formed to about 20 μm. As shown in FIG. 3, the depth t ₂ between the projections 3 b in the first region 4 is about 20 μm, and each projection 3 b in the second region 5
depth t ₃ of between b is about 30Myuemu～40myuemu.

The number of protrusions 3b per square inch of the first region 4 and the second region 5 is not limited to 400 and 200, respectively, but also the square inch of the first region 4. It is only necessary that the number per square inch of the second region 5 be smaller than the number per unit.

The printing plate 1 for forming a thin film is shown in FIGS.
It is manufactured as shown in FIG. That is, the printing plate 1 for forming a thin film includes a resin part molding step of molding the resin 6 to a constant thickness, a back exposure step of exposing from one surface 6a of the resin 6 formed in the resin part molding step, An uneven surface forming step of forming an uneven surface by exposing from the other surface 6b of the resin 6;
A cleaning step of cleaning the other surface 6b exposed in the uneven surface forming step, a drying step of drying moisture adhering to the resin 6, a curing step of curing the resin 6 by exposure, and a surface of the resin 6 It has a surface treatment step for tackiness and an air exposure step for tackiness on the surface of the resin 6.

In the resin part forming step, as shown in FIG. 4, a negative film 8 and a gabber film 9 are disposed on a glass substrate 7 so as to overlap each other. Here, the negative film 8 is made transparent so as to irradiate light to the above-mentioned portion to be the convex portion 3b.
The other parts are prevented from transmitting light. That is, in the negative film 8, a pattern corresponding to the above-described first region 4 and second region 5 is formed. The cover film 9 has a thickness of 10 μm to 20 μm.
It is formed with a thickness of about μm, and has a function of making the negative film 8 adhere to the glass substrate 7 and preventing the negative film 8 and the glass substrate 7 from being stained by the resin 6. Then, the liquid resin 6 is placed on the cover film 9.
Is formed, the resin 6 is supplied onto the governor film 9 and the base film 11 is moved in the direction A in a state where the packet 10 is disposed on the resin 6, whereby the resin 6 is formed into a substantially constant thickness. The base film 11 is disposed on the resin 6.

The above-mentioned negative film 8 is formed by stacking a negative film 8 on which a pattern corresponding to the first region 4 is formed and a negative film 8 on which a pattern corresponding to the second region 5 is formed. It may be provided on the substrate 7.

In the back exposure step, as shown in FIG.
The glass substrate 12 is placed on one surface 6a of the resin 6 formed in the above-described resin part forming step. Then, exposure is performed on one surface 6a of the resin 6 to be exposed by using the light source 13 disposed on the glass substrate 12. By performing the exposure in this manner, the one surface 6a side of the resin 6 reacts and cures, and the adhesiveness of the base film 11 is improved, so that the resin 6 and the base film 11 are bonded. Here, by adjusting the light amount of the light source 13,
Is exposed to a predetermined depth t ₄ from the base film 11 and is cured.

In the uneven surface forming step, as shown in FIG.
Exposure is performed using a light source 14 disposed on the other surface 6b side of the resin 6 on which the negative film 8 is disposed. By performing the exposure from the other surface 6b of the resin 6 as described above, light is transmitted through the negative film 8 to cure the resin 6. Here, the resin 6 corresponding to the portion of the negative film 8 that does not transmit light is not irradiated with light and is not cured. In this manner, by performing exposure through the negative film 8, a pattern of a portion cured by light and a portion not cured can be formed on the other surface 6b of the resin 6.

In the cleaning step, as shown in FIG. 7, the other surface 6b exposed in the above-described uneven surface forming step is cleaned with a cleaning liquid 15. By cleaning the other surface 6b of the resin 6, the uncured portions that have not been exposed in the above-described steps are removed. Here, the resin 6 is washed by spraying a solution obtained by dissolving a WO (Wash Out) agent as a surfactant in water at a predetermined temperature. In order to prevent foaming when the WO agent is sprayed, cleaning is performed using a defoaming agent dissolved in water.

In the drying step, as shown in FIG. 8, warm air is blown against the resin 6 by a heater to dry the cleaning liquid 15 attached to the resin 6 in the above-described cleaning step.

In the curing step, as shown in FIG. 9, the resin 6 having undergone the above-described drying step is immersed in water. And the water surface 1
The resin 6 is cured by exposing it with a chemical lamp 17 disposed on the resin 6.

In the surface treatment step, as shown in FIG.
For example, by dipping the resin 6 in the benzophenone solution 18, the tackiness of the surface of the resin 6 is reduced. Here, the benzophenone solution 18 is a solution obtained by dissolving benzophenone in ethyl alcohol.

In the air exposure step, as shown in FIG.
By irradiating a sterilizing lamp 19 disposed on the resin 6, the tackiness of the surface of the resin 6 is reduced, and the printing plate 1 for forming a thin film as shown in FIGS. 1 to 3 is completed.

In the above-described manufacturing process of the printing plate 1 for forming a thin film, an example of manufacturing the printing plate 1 for forming a thin film using a liquid photocurable resin has been described. A plurality of convex portions are formed on the surface of the plate-shaped photocurable resin by using a solid-state resin obtained by molding a curable resin into a plate-like shape, thereby manufacturing the thin-film forming printing plate 1 shown in FIG. You may.

The printing plate 1 for forming a thin film manufactured as described above.
Is used in a printing machine 20 as shown in FIG. The printing press 20 includes a metering roller 2 that adjusts the amount of the coating liquid 21.
2, a transfer roller 23 for transferring the coating liquid 21 supplied from the adjusting roller 22 to the printing plate 1 for thin film formation, a printing plate 1 for thin film formation for applying the coating liquid 21 to a printing substrate 24, and A plate cylinder 25 on which the printing plate 1 for forming a thin film is mounted on an outer peripheral surface, and a platen 26 on which a printing material 24 is placed.
And a moving table 27 for moving the printing substrate 24 by moving the platen 26.

The metering roller 22 is formed in a columnar shape, and is rotated in a predetermined direction B about a long axis. The metering roller 22 receives a coating liquid 2 from a coating liquid supply mechanism (not shown).
1 is supplied to adjust the amount of the coating liquid 21.

The transfer roller 23 is provided with the above-described metering roller 22.
Is formed in a columnar shape in the same manner as described above, and is rotated in the direction C opposite to that of the above-described metering roller 22. The transfer roller 23 has a groove 23a formed on the outer wall along the rotation direction. The transfer roller 23 is supplied with the coating liquid 21 from the above-mentioned metering roller 22 and uniformly applies the coating liquid 2 to the printing plate 1 for thin film formation.
Transfer 1 Then, the coating liquid 21 is supplied to the printing plate 1 for thin film formation between the convex portions 3b.

Here, the coating liquid 21 is transferred by the transfer roller 23.
As shown in FIG. 2, the printing plate 1 for forming a thin film has a large area between the convex portions 3b of the second region 5, and
Depth t ₃ of between the convex portions 3b is large. In the printing plate 1 for forming a thin film having such a shape, the coating liquid 21 supplied to the first area 4 and stays at the depth t ₂ while being supplied to the second area 5 and staying there. The applied coating solution 21 is supplied so as to have a depth of t ₃ or less. Therefore, in such a printing plate 1 for forming a thin film, even if the coating solution 21 flows from the first region 4 to the second region 5, the second
Can be retained between the convex portions 3b in the region 4 of the above, so that a large amount of the coating liquid 21 is not retained only at the edges.

The printing plate 1 for forming a thin film is mounted on an outer peripheral wall of a plate cylinder 25. The plate cylinder 25 is formed in a columnar shape, and has a long axis as a center axis and a direction D opposite to the transfer roller 23.
Is driven to rotate. Then, the printing plate 1 for forming a thin film is pressed against the transfer roller 23 by a predetermined pressure, and the coating liquid 21 is supplied between the convex portions 3b. The printing plate 1 for forming a thin film is pressed against the printing material 24 by rotating the plate cylinder 25, and applies the coating liquid 21 supplied from the transfer roller 23 to the printing material 24.

The platen 26, on which the printing material 24 is placed, is moved at a predetermined speed in the rotation direction E of the plate cylinder 25 by the moving table 27, and the printing plate 1 for thin film formation attached to the plate cylinder 25 is mounted on the platen 26. And a predetermined pressing pressure. As described above, the printing medium 24 placed on the platen 26
As shown in FIG. 13, the printing plate 1 for forming a thin film is pressed with a predetermined nip width t ₅ , and the coating liquid 21 supplied from the transfer roller 23 is transferred. Then, as shown in FIG. 14, the printing plate 1 for forming a thin film is rotated by the plate cylinder 25 and the platen 26 and the printing medium 24 are moved by the moving table 27 so that the coating liquid 21 is applied to the printing medium 24.
Is formed by applying a coating film 28 made of.

The coating film 28 formed by the printing machine 20 as described above is formed as shown in FIGS. That is, the coating film 28 is formed on the printing plate 1 for forming a thin film.
Is lower in the density of the convex portions 3b formed in the second region 5 than in the first region 4,
The coating liquid 21 remaining in the first area 4 is supplied to the second area 5 by rotating the plate cylinder 25 by supplying the coating liquid 21 between b and b.
Therefore, the coating liquid 21 does not stay in a large amount even when the coating liquid flows, and the film thickness does not increase near the edge of the coating film 28. Therefore, by forming the coating film 28 with the printing machine 20, it is possible to form the coating film 28 having a uniform thickness as a whole.

As described above, the printing machine 20 provided with the printing plate 1 for forming a thin film can be applied in a manufacturing process for manufacturing a liquid crystal panel, for example, as shown in FIG.
In the method of manufacturing a liquid crystal panel described below, a bassivation film, a color filter, a flattening film, a counter electrode,
A first glass substrate 30a on which an insulating film, an alignment film, and a sealant are sequentially formed is opposed to a second glass substrate 30b on which a barrier film, a counter electrode, an insulating film, an alignment film, and a spacer are sequentially formed. A description will be given of a manufacturing method of attaching and filling a liquid crystal between the first glass substrate 30a and the second glass substrate 30b.

The manufacturing process of the liquid crystal panel includes a glass processing process for processing the surfaces of the first and second glass substrates 30, a bassivation film forming process for forming the passivation film 31, and a first glass process. A color filter forming step of forming a color filter 32 on the passivation film 31 formed on the substrate 30a, a flattening film forming step of forming a flattening film 33 on the color filter 32,
A counter electrode forming step of forming a counter electrode on the first and second glass substrates 30; an insulating film forming step of forming an insulating film 35 on the counter electrode 34; Forming an alignment film, forming a sealing agent 37 on the edge of the first glass substrate 30a, and dispersing a spacer 38 on the alignment film 36 of the second glass substrate 30b. A bonding step of bonding a pair of glass substrates 30 to each other;
Injecting into the gap between the pair of glass substrates 30,
And a sealing step of sealing the liquid crystal 39 injected in the injection step.

In the glass processing step, as shown in FIG. 17 (a), the surfaces of the first and second glass substrates 30 are processed and cleaned to process the surfaces of the first and second glass substrates 30. In addition to improving the wettability, the adhesiveness of a film formed in a later step is improved.

FIG.
As shown in FIG. 2B, a barrier film 31 is formed on the glass substrate 30 whose surface has been processed in the above-described steps.
As described above, in the bassivation film forming step, the adhesion to the color filter 32 formed in a later step is improved by forming the bassivation film 31.

In the color filter forming step, FIG.
As shown in (c), this is a step performed on the first glass substrate 30a, in which a color filter 32 is formed on the passivation film 31 formed in the above-described step. The color filter 32 is an optical element that partially has light transmissivity and partially absorbs, reflects, or transmits incident light.

As shown in FIG. 17D, the flattening film forming step is a step performed on the first glass substrate 30a, and the flattening film 33 is formed on the color filter 32 formed in the above-described step. To form Thus, in the flattening film forming step, the surface can be flattened by forming the flattening film 33.

The counter electrode forming step is a step performed on both the first and second glass substrates 30 as shown in FIG. 17E, and the flattening film 33 formed in the above-described step is formed.
An opposing electrode 34 is formed thereon. The electrode 34 is also formed on the first glass substrate 30 to be bonded in a later step, and a voltage is applied between the counter electrodes 34 formed on the second glass substrate 30b.

In the insulating film forming step, as shown in FIG. 17F, an insulating film 35 is formed on the counter electrode 34 formed in the above-described step. As described above, in the insulating film forming step, the insulating property with the counter electrode 34 formed on the second glass substrate 30b is maintained by forming the insulating film 35 on the counter electrode 34.

In the alignment film forming step, as shown in FIG. 17G, the alignment film 36 is formed by applying an alignment liquid made of polyimide or the like on the insulating film 35 formed in the above step. When forming the alignment film 36, the alignment film 36 is formed on the insulating film 35 by using the printing machine 20 in which the above-described printing plate 1 for forming a thin film is attached to the plate cylinder 25. That is, in the above-described printing machine 20, the glass substrate 30 on which the insulating film 35 and the like are formed is placed on the surface plate 27, is moved by the moving table 27, and the plate cylinder 25 is rotationally driven to form a thin film. The printing plate 1 is pressed on the insulating film 35 with a predetermined pressure, so that the alignment film 3 is formed on the insulating film 35.
6 is formed.

As shown in FIG. 17 (h), the sealing agent application step is a step performed on the first glass substrate 30a, and the sealing agent 3 is formed on the alignment film 36 formed in the above-described step.
7 is formed. The sealing agent 37 is formed by applying to the edge of the first glass substrate 30a on which the alignment film 36 is formed.

The spacer dispersing step is a step performed on the second glass substrate 30b, as shown in FIG. 17 (i), and disperses spacers 38 as transparent beads such as glass on the alignment film 36. The spacer 38 is used to keep the distance between the pair of glass substrates 30 constant when the pair of glass substrates 30 is bonded in a later step.

In the bonding step, a pair of glass substrates 30 are bonded as shown in FIG. In this bonding step, the first glass substrate 30a having the sealant 37 formed on the alignment film 36 and the second glass substrate 30b having the spacers 38 scattered on the alignment film 36 are bonded to face each other. . In the bonding step, the sealant 37 is cured by irradiating the pair of glass substrates 30 with ultraviolet rays, and the pair of glass substrates 3 is cured.
0 is adhered. Here, the interval between the pair of glass substrates 30 after the bonding is about several hundreds to several tens μm.

In the injection step, as shown in FIG. 17 (k), the liquid crystal 39 is injected from the injection port to fill the gap between the pair of glass substrates 30 with the liquid crystal 39.

In the sealing step, as shown in FIG.
The liquid crystal 3 injected between the pair of glass substrates 30 in the above process
9 is sealed. That is, in this sealing step, the above-described injection port is sealed. In this sealing step, the liquid crystal panel is completed by performing light treatment or heat treatment to stabilize the alignment state of the liquid crystal 39.

In the liquid crystal panel manufactured as described above, since the alignment film 36 is formed using the above-described printing machine 20 in the above-described alignment film forming step, the surface of the alignment film 36 is formed flat. And the manufacturing yield can be improved. In other words, according to the manufacturing process of the liquid crystal panel as described above, the film thickness does not increase at the edge in the region where the alignment film 36 is formed, and the defect rate can be greatly reduced. As shown in (1), the defect rate due to the uneven thickness of the alignment film 36 at the edge can be reduced to about 0.02%.

In the above description, an example in which the alignment film 36 of the liquid crystal panel is formed has been described. However, the printing technique using the above-described printing plate 1 for forming a thin film and the printing technique using the printing plate 1 for forming a thin film are described. The present invention can be applied to any printing field as long as the printing technique uses a thin film forming method. In the above-described printing plate 1 for forming a thin film and the method of forming a thin film, an example in which an alignment film is formed on a glass substrate as a printing material has been described, but the printing material may be, for example, paper, a film, or the like.

[0058]

As described above in detail, the printing plate for forming a thin film according to the present invention has the first region in which the projections are formed at a predetermined density defined by the number of projections per unit area. And a second region formed at an edge of the first region with a convex portion formed at a lower density than a predetermined density, and formed in the second region than the first region. Since the density of the projections is low, even if the liquid that is supplied between the projections and stays in the first region flows into the second region, a large amount of liquid does not stay. That is, in such a printing plate for forming a thin film, even if the liquid flows from the first region to the second region, the liquid can be retained between the convex portions of the second region. No liquid is retained.
Therefore, in this printing plate for forming a thin film, the film thickness does not increase at the end of the thin film to be formed.

Further, in the method for forming a thin film using the printing plate for forming a thin film according to the present invention, when the coating liquid is supplied to the printing plate for forming a thin film and pressed against the printing plate for forming a thin film, the convexity of the first region is formed. Even if the coating liquid retained between the portions flows into the second region, the coating liquid does not remain in the liquid in a large amount, and the film thickness of the formed thin film at the edge is substantially thicker than that at the center. There is no such thing.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of a printing plate for forming a thin film to which the present invention is applied.

FIG. 2 is a plan view showing an example of a printing plate for forming a thin film to which the present invention is applied.

FIG. 3 is a side view showing an enlarged example of a printing plate for forming a thin film to which the present invention is applied.

FIG. 4 is a side view showing an example of a resin part forming step in a manufacturing step of a printing plate for forming a thin film.

FIG. 5 is a side view showing an example of a back exposure step in a manufacturing process of a printing plate for forming a thin film.

FIG. 6 is a side view showing an example of an uneven surface forming step in the manufacturing process of the printing plate for forming a thin film.

FIG. 7 is a side view showing an example of a cleaning step in a manufacturing process of the printing plate for forming a thin film.

FIG. 8 is a side view showing an example of a drying process in a manufacturing process of a printing plate for forming a thin film.

FIG. 9 is a side view showing an example of a curing step in a manufacturing process of a printing plate for forming a thin film.

FIG. 10 is a side view showing an example of a surface treatment step in a process of manufacturing a printing plate for forming a thin film.

FIG. 11 is a side view showing an example of an in-air exposure step in a manufacturing process of a printing plate for forming a thin film.

FIG. 12 is a perspective view showing an example of a printing machine in which a printing plate for forming a thin film is mounted on a plate cylinder.

FIG. 13 is a side view showing an example when a printing plate for forming a thin film attached to a plate cylinder is pressed against a printing medium.

FIG. 14 is a perspective view showing an example when a printing plate for forming a thin film attached to a plate cylinder is pressed against a printing medium.

FIG. 15 is a side view showing an example of a coating film applied on a printing substrate.

FIG. 16 is an enlarged perspective view showing an edge portion of a coating film applied on a printing substrate.

FIG. 17 is a process chart showing a manufacturing process of the liquid crystal panel.

FIG. 18 is a diagram illustrating an example of a defect rate of a liquid crystal panel in which an alignment film is formed using the printing plate for forming a thin film according to the present invention.

FIG. 19 is an enlarged perspective view showing an edge portion of a coating film applied on a printing substrate.

FIG. 20 is a diagram illustrating an example of a defect rate of a liquid crystal panel in which an alignment film is formed using a conventional printing plate for forming a thin film.

[Explanation of symbols]

1 Printing Plate for Thin Film Formation, 4 First Area, 5 Second Area, 21, Coating Liquid

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B41N 1/12 B41N 1/06 B41F 17/14 G02F 1/1337 520

Claims (6)

(57) [Claims] 1. A rectangular thin-film-forming printing plate having a plurality of projections formed on one surface, wherein the one surface is defined by the number of projections per unit area.
A first region having a rectangular shape in which the convex portion is formed at a predetermined density, and a convex portion formed at a density lower than the predetermined density and formed on an edge portion to surround the first region. A thin film, wherein a plurality of convex portions are arranged and formed in the first region and the second region at a predetermined angle with respect to the short side of the rectangular shape. Printing plate for forming. 2. The printing plate for forming a thin film according to claim 1, wherein the printing plate is made of a photocurable resin. 3. The printing plate for forming a thin film according to claim 2, wherein an alignment liquid is supplied between the convex portions, and the one surface is pressed against a printing substrate to form a liquid crystal alignment film. 4. A rectangular first region in which a plurality of protrusions are formed on one surface, and wherein the protrusions are formed at a predetermined density defined by the number of protrusions per unit area. ,
A second region formed at an edge to surround the first region, wherein the convex portion is formed at a density lower than the predetermined density, and a predetermined region is defined with respect to the short side of the rectangular shape. A coating liquid is supplied to a printing plate for thin film formation in which a plurality of convex portions are arranged and formed in the first region and the second region at an angle, and the printing plate for thin film formation is coated with the coating solution. A method for forming a thin film, comprising pressing against an object. 5. The method for forming a thin film according to claim 4, wherein said printing plate for forming a thin film is made of a photocurable resin. 6. A method of forming a liquid crystal alignment film by supplying an alignment liquid between the respective convex portions formed on the printing plate for forming a thin film and pressing the printing plate for forming a thin film against an object to be coated. The method for forming a thin film according to claim 5, wherein: