JPH02287405A - Color filter and production thereof - Google Patents

Abstract

PURPOSE:To obtain the color filter which has a uniform pattern width and has no gaps between picture elements by using aligner marks formed by connecting plural independent circular or polygonal shapes. CONSTITUTION:Shapes, such as circular or polygonal shapes (for example, triangle shape), are used in place of the conventional aligner marks. If, for example, the circular aligner marks are used, the discrimination of the respective colors; R 1, G 2, B 3, is possible regardless of the reflected color tones even when the respective colors overlap each other with deviations or part from each other. The perfect alignhment is, therefore, executed. The generation of misalignment is eventually obviated. The exact alignment of the R, G, B is executed in this way and the good color filter which does not generate defec tive color tones at the time of lighting is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] In the present invention, a colored film is formed on a substrate such as glass by a printing method or the like. A method for manufacturing color filters for electro-optic display devices such as liquid crystal displays and other precision electronic devices.

[Conventional technology]

Color filter manufacturing methods include photolithography, electrodeposition, printing, etc., but any of these methods can produce R-G-B, R-G-B,
In order to indicate the positions of the three-color patterns, it has been common practice to use cross-shaped registration marks as shown in FIG. 4 as aligner marks to manufacture color filters.

[Problem to be solved by the invention]

By the way, in image formation, when printing three colors of R, G, and B on the same substrate, for example, three times, the positional accuracy of each color is important, and the accuracy requires micrometer units. do. However, in today's world where positional accuracy is required in micrometer units, the conventional method using cross-shaped registration marks is not always sufficient, resulting in non-uniformity of the R-GφB pattern 11 due to poor alignment, and gaps between each pixel that occur during lighting. This had the problem of easily causing poor color tone due to light leakage.

The present invention is intended to solve these conventional problems, and its purpose is to provide a color filter that has a uniform pattern width and no gaps between pixels.

[Means to solve the problem]

In order to solve the above problems, the present invention uses a plurality of consecutive circular or polygonal independent shapes as aligner marks for RGB alignment when forming a predetermined pattern on a substrate using a printing method or the like. It is characterized by its use.

[For production]

The present invention uses shapes such as circles or polygons (eg, triangles) in place of traditional aligner marks. When using conventional aligner marks, as shown in Figure 5, if the first and second colors are misaligned, the registration marks shown on a black-and-white monitor TV will appear the same black if the misalignment is only a few micrometers. Therefore, a problem arose in that the deviation could not be determined.

Therefore, as shown in Figure 1, the diameter is 130μm and the diameter is 130μm.
When using the m triangular aligner mark, as shown in Figures 2 and 3, even if they overlap or are separated, it is possible to clearly distinguish the colors regardless of the reflected color tone. As a result, we were able to perfectly align the positions, and as a result, we were able to manufacture a color filter with the same pattern width for all three colors without any gaps between pixels, and the color tone defects caused by light leakage during lighting were resolved.

〔Example〕

Example 1 300g+/s X300m/s Xi, is/m
The glass of t was washed and offset printing was performed. The printing conditions are as follows. The printing machine used was Kouyousha 600CL, the plate was oriented east, and the plate was made using waterless lithography (negative type).The pattern was 240s/sxo, and 13 l-wide pixel sizes were arranged in stripes. I used something.

The aligner mark is φ130, the same size as the pattern width.
Figure 1 shows a diameter of μm, and a circular one was used. This is made to have the same size for the purpose of accurately moving by one pixel. The ink used was Toyo Ink's RGB three-color ink for waterless lithographic printing, and the printing pressure was 0.111 mm. R was first printed and dried. Next, adjust the print position by one aligner mark.
After making a trial print with a shift of 30 μm and confirming on a monitor TV that the outer circumferences of the circles of the aligner marks were in contact with each other and there were no overlaps and no gaps, G was printed, and B was also printed in the same manner.

After three-color printing, we checked the printing position using a tool microscope at 100x magnification, and found that the stripe width for both RGB was 130μ.
Printed at m±3μm, and the printing position is also the reference position ±3μm.
It was in the. If the reference position size is not within ±10 μm, there will be a misalignment with the ITO electrode, and the light transmission area will be narrowed, making it impossible to obtain good image quality. Good results were obtained, with no gaps between pixels and no poor color tone due to light leakage in the lighting results.

Example 2 300m/-x300a/Xi, 1 shoe/ml glass was cleaned and offset printing was performed. The printing conditions are as follows. The printing machine used was Kouyousha 600CL, and the plate was made using a waterless lithographic plate (negative type). The pattern used was a pixel size of 260 s/s x Q and a width of 12-1 square meters arranged in a stripe shape. aligner
The first mark is 120 μm, which is the same size as the pattern width.
A triangular one with the shape shown in the figure was used. This is 1
They are made to have the same dimensions for the purpose of moving accurately by the amount of a pixel. The ink used was Toyo Ink's RGB ink for waterless planography, and the printing pressure was 0.15111.R was first printed and dried.

Next, set the print position, aligner mark, 120
Printing was performed with a μm shift, and after confirming on a monitor TV that the vertices of the marks were in contact with each other and there were no overlaps and no gaps, G and B were subsequently printed in the same manner. After three-color printing, the printing position was confirmed using a tool microscope at 100x magnification, and it was found that RG
Both B and B were printed with a stripe width of 120 μm±3 μm, and the printing position was within ±3 μm of the reference position.If the standard position dimension was not within ±10 μm, ITo
Misalignment with the electrodes occurs, and the light transmission area becomes narrow, making it impossible to obtain good image quality. Good results were obtained, with no gaps between pixels and no poor color tone due to light leakage in the lighting results.

The present invention can also be applied to photolithography, electrodeposition, and the like.

[Effects of the Invention] As detailed above, according to the present invention, a mark having a shape other than a cross mark is used as an aligner mark for aligning RGB when forming a color filter in a predetermined pattern. This makes it possible to accurately display the position, and provides a good color filter that allows pattern 11 to be printed uniformly in both RGB, without gaps between pixels, and without color tone defects due to light leakage when turned on. I can do it.

1...1st time, R printing 2...Second time, G printing 3...Third time, B printing Applicant: Seiko Epson Corporation Agent: Patent attorney Kisanbe Suzuki (1 other person)

[Brief explanation of drawings]

FIG. 1 is a diagram showing the printed shape of an aligner mark according to the present invention. FIG. 2 is a diagram showing a printed shape when the aligner marks of the present invention are shifted and overlapped. FIG. 3 is a diagram showing a printed shape when the aligner marks of the present invention are shifted and separated. FIG. 4 is a diagram showing the printed shapes of normally used cross register marks and aligner marks. FIG. 5 is a diagram showing the printed shape when the cross registration marks and aligner marks are misaligned. (a> (OL) (b) (b) (C) (('') Figure 1 Figure 2 (α) ((j Figure 3 Cb) Cd) Figure 4 Figure 5

Claims (1)

[Scope of Claims] 1) A color filter characterized in that a plurality of circular or polygonal independent shapes are connected and used as an aligner mark. 2) A method for manufacturing a color filter, comprising using the aligner mark according to claim 1.