JPH04221902A - Method for correcting color filter layer - Google Patents

Abstract

PURPOSE:To provide the method for correcting color filter layers which can easily flatten the surfaces of the color filter layers and a top coat layer concerning the correction method for flattening the projections formed on the color filter layer and the top coat layer in the production of a liquid crystal display element. CONSTITUTION:The stage for forming the color filter layers 2 on a glass substrate 1 of the liquid crystal display element is constituted to form a protective film layer 7 consisting of an easily strippable resin having an excellent adhesive property on the color filter layers 2 as a means for removing the projections 3 formed by the foreign matter embedded or half embedded in the color filter layers 2 and to remove the projections 3 until the surfaces of the color filter layers 2 together with the protective film layer 7 are nearly flattened as well as to strip the remaining protective film layer 7 from the color filter layers 2.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to the process of forming a color filter layer on a glass substrate in the production of liquid crystal display devices, and in particular to a method for flattening protrusions formed on the surface of a color filter layer or a top coat layer. Regarding.

[0002] When a protrusion is present on the surface of a color filter layer or a top coat layer in the manufacture of a liquid crystal display element, the distance between the transparent electrodes formed on the protrusion and which rotate the liquid crystal changes, causing color unevenness. However, the resin forming the color filter layer and the top coat layer has a high viscosity, and when foreign matter such as dust gets mixed into the resin, the part swells and protrusions are formed. Therefore, there is a need to establish a method that can easily flatten the surfaces of color filter layers and top coat layers.

0003

2. Description of the Related Art FIG. 3 is a schematic diagram showing a conventional method for modifying a color filter layer, and FIG. 4 is a schematic diagram showing a conventional method for modifying a top coat layer.

A conventional repair method for eliminating protrusions formed on the surface of a color filter layer involves removing protrusions 3 protruding from the surface of a color filter layer 2 formed on a glass substrate 1, as shown in FIG. 3(a). For example, positioning the cutting tool 4 such as a micro drill or a micro cutter, as shown in FIG. 3(b).
The protrusions 3 are removed until the surface of the color filter layer 2 becomes almost flat as shown in FIG. In the figure, 31 indicates a foreign object buried or semi-buried in the color filter layer 2, and 32 indicates a cutting debris.

[0005] Furthermore, a conventional repair method for eliminating protrusions formed on the surface of the top coat layer is as shown in FIG. 4(a). The cutting tool 4 is positioned to cut out the projections 6 until the surface of the top coat layer 5 becomes flat as shown in FIG. 4(b). In the figure, 61 indicates a foreign object buried or semi-buried in the top coat layer 5, and 62 indicates a cutting debris.

[0006]

[Problems to be Solved by the Invention] However, the conventional method involves positioning the cutting tool 4 on the protrusions 3 and 6 protruding from the surface with the normal surfaces of the color filter layer 2 and top coat layer 5 exposed. This method causes the resection debris 32 and 62 generated by the resection to adhere to the normal surface and generate new protrusions. Further, there is a problem in that normal surfaces are damaged when removing the cutting debris 32 and 62 by cleaning or the like.

An object of the present invention is to provide a method for modifying a color filter layer that can easily flatten the surface of a color filter layer or a top coat layer.

[0008]

[Means for Solving the Problems] FIG. 1 is a schematic diagram showing a color filter layer repair method according to the present invention. The same objects are represented by the same symbols throughout the figures.

The above-mentioned problem is that in the step of forming a color filter layer 2 on a glass substrate 1 of a liquid crystal display element, projections 3 caused by foreign substances buried or semi-buried in the color filter layer 2 are formed.
As a means for removing this, a protective film layer 7 made of a resin with excellent adhesion and easy peeling is formed on the color filter layer 2, so that the surface of the color filter layer 2 together with the protective film layer 7 becomes almost flat. The protrusion 3 is removed until the remaining protective film layer 7 is removed.
This is achieved by the color filter layer repair method of the present invention, in which the color filter layer 2 is peeled off from the color filter layer 2.

0010

[Operation] In Fig. 1, a protective film layer made of resin with excellent adhesion and easy peeling is formed on the color filter layer, and the protrusions are removed together with the protective film layer until the surface of the color filter layer becomes almost flat. However, by peeling off the remaining protective film layer from the color filter layer, adhesion of cut debris generated by cutting to the normal surface, which causes new protrusions, is eliminated. Furthermore, it becomes possible to thoroughly clean the protective layer before peeling it off from the color filter layer, and the problem of damaging the normal surface when removing the cut debris by cleaning or the like is solved. That is, it is possible to realize a color filter layer repair method that can easily flatten the surface of a color filter layer or a top coat layer.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the accompanying drawings. Note that FIG. 2 is a schematic diagram showing a top coat layer repair method according to the present invention.

The repair method of the present invention for eliminating protrusions formed on the surface of a color filter layer is a method of repairing a color filter layer 2 formed on a glass substrate 1 as shown in FIG. A protective film layer 7 made of a resin such as a resist film with excellent adhesion and easy peeling is formed, and a cutting tool 4 is positioned on the protrusion 3 protruding from the surface of the color filter layer 2. Thereafter, as shown in FIG. 1(b), the protrusions 3 are removed until the surface of the color filter layer 2 together with the protective film layer 7 becomes substantially flat. Most of the cut debris 32 generated by the cutting adheres to the vicinity of the position where the protrusion 3 was as shown in the figure, but the surface is thoroughly cleaned and the remaining protective film layer 7 is replaced with a color filter layer as shown in FIG. 1(c). By peeling it off from the color filter layer 2, the cutting debris can be removed without damaging the normal surface of the color filter layer 2.

The repair method according to the present invention is also effective for removing protrusions formed on the surface of the top coat layer. The correction method of the present invention for eliminating protrusions formed on the surface of the top coat layer is shown in Figure 2.
As shown in (a), when modifying the top coat layer 5 formed on the color filter layer 2, a protective film layer 7 made of a resin with excellent adhesion and easy peeling, such as a photoresist film, is formed thereon. Then, the cutting tool 4 is positioned on the protrusion 6 protruding from the surface of the top coat layer 5. Thereafter, as shown in FIG. 2(b), the protrusions 6 are removed until the surface of the top coat layer 5 together with the protective film layer 7 becomes substantially flat. Most of the cutting debris 62 generated by the cutting adheres to the vicinity of the position where the protrusion 6 was as shown in the figure, but the surface is thoroughly cleaned and the remaining protective film layer 7 is coated with a top coat layer as shown in FIG. 2(c). By peeling it off from the top coat layer 5, the cutting debris 62 can be removed without damaging the normal surface of the top coat layer 5.

[0014] A protective film layer made of resin with excellent adhesion and easy peeling is formed on the color filter layer, and the protrusions are removed together with the protective film layer until the surface of the color filter layer becomes almost flat. However, by peeling off the remaining protective film layer from the color filter layer, adhesion of cut debris generated by cutting to the normal surface, which causes new protrusions, is eliminated. Furthermore, it becomes possible to thoroughly clean the protective layer before peeling it off from the color filter layer, and the problem of damaging the normal surface when removing the cut debris by cleaning or the like is solved. That is, it is possible to realize a color filter layer repair method that can easily flatten the surface of a color filter layer or a top coat layer.

[0015]

As described above, according to the present invention, it is possible to provide a color filter layer repair method that can easily flatten the surface of a color filter layer or a top coat layer.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing a color filter layer repair method according to the present invention.

FIG. 2 is a schematic diagram showing a top coat layer repair method according to the present invention.

FIG. 3 is a schematic diagram showing a conventional color filter layer correction method.

FIG. 4 is a schematic diagram showing a conventional top coat layer correction method.

[Explanation of symbols]

1 Glass substrate 2
Color filter layer 3 protrusion
4 Removal tool 5 Top coat layer 6 Protrusion 7 Protective film layer 31, 61 Foreign matter 32,
62 Resection debris

Claims (2)

[Claims] Claim 1: In the step of forming a color filter layer (2) on a glass substrate (1) of a liquid crystal display element,
As a means for removing protrusions (3) caused by foreign matter buried or semi-buried in the color filter layer (2), a protective film layer (7) made of a resin with excellent adhesion and easy peeling is applied to the color filter layer (2). ), the protrusions (3) are removed together with the protective film layer (7) until the surface of the color filter layer (2) becomes almost flat, and the remaining protective film layer (7) is removed. A color filter layer repair method characterized by peeling off the color filter layer (2). 2. In the step of further forming a top coat layer (5) on the color filter layer (2),
As a means of removing protrusions (6) caused by foreign matter buried or semi-buried in the top coat layer (5), a protective film layer (7) made of a resin with excellent adhesion and easy peeling is applied to the top coat layer (5). ) is formed on the protective film layer (
7) At the same time, the projections (6) are removed until the surface of the top coat layer (5) becomes almost flat, and the remaining protective film layer (7) is peeled off from the top coat layer (5). A color filter layer correction method.