JPH01248101A - Manufacture of multicolor filter - Google Patents

Abstract

PURPOSE:To simplify manufacturing processes by using a resin of a type of generating or extinguishing a functional group by exposure to light. CONSTITUTION:The resin represented by formula I generates the functional group by exposure to light, accordingly, said group is generated only in areas exposed to light through a mask. When a base plate exposed to light is dipped into a solution having dissolved a dye represented by formula II, the dye reacts with only the exposed areas and attaches to them, and all the functional groups can be consumed by sufficiently dipping the plate, thus permitting color mixing due to the dye to be used in the next step to be avoided, and the manufacturing processes to be simplified.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method for manufacturing a multicolor color filter, and more specifically, in a method for manufacturing a multicolor color filter using a photolithography method, the present invention relates to a method for manufacturing a multicolor color filter using a photolithography method. The present invention relates to a method for manufacturing a multicolor color filter using a group generation (disappearance) type resin.

[Conventional technology]

A conventional method for manufacturing a multicolor color filter using photolithography involves the following steps.

(1) Spin-coding the photosensitive resin (2) Expose to light through a mask (3) Remove unnecessary areas by developing (4) Dye the exposed areas (5) Perform resist dyeing process The conventional method for manufacturing multicolor color filters was to repeat the process several times.

[Problem to be solved by the invention]

However, this method has the disadvantage that a resist dyeing process is always required to prevent color mixing before the next process.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks, and its object is to provide a method for manufacturing a multicolor color filter with simple steps.

[Means to solve the problem]

The method for manufacturing a multicolor color filter of the present invention is characterized in that a reactive dye and a functional group generation (annihilation) type resin by light are used in the method for manufacturing a multicolor color filter by photolithography.

[Effect]

In the resin used in the present invention, functional groups are generated (disappeared) by light. Therefore, functional groups are generated (disappeared) only in the areas exposed through the mask. If the exposed substrate is immersed in a solution containing a dye containing a reactive group, the dye will react only in the exposed areas (unexposed areas). By sufficiently dipping, the functional groups can be consumed and color mixing by dyes in the next step can be avoided.

Since no functional groups remain in the unexposed area (exposed area), the attached dye can be easily washed off.

By repeating this process as many times as necessary, it is possible to manufacture a multicolor filter.

[Example 1] A 20% carbon tetrachloride solution in which the following was dissolved was applied by a spin cord method at a rotational speed of 200 rpm.

After application, dry and UV light passes through the mask! 1! exposed. As a result, the hydroxyl group in the exposed area was changed to a ketone.

The unexposed area was stained by immersing it in an ethanol solution. After dyeing, the substrate was immersed in an aqueous ethanol solution to wash the substrate and convert the ketones in the exposed areas back to hydroxyl groups.

After drying the substrate again, repeat the same process and apply the dye. The unexposed area was stained by immersing it in an ethanol solution.

In this way, a blue-yellow mosaic two-color filter was produced.

[Example 2] A carbon tetrachloride solution in which the copolymer described in Example 1 was dissolved was applied to a glass substrate with a transparent electrode using a spin code method in the same manner as in Example 1.

After coating, the entire surface was irradiated with ultraviolet rays to convert the hydroxyl groups in the entire resin to ketones.

Next, a portion of the transparent electrode was exposed to ultraviolet light through a mask, and the ketones in the exposed areas were converted back to hydroxyl groups.

The substrate obtained in this way is dyed. The exposed area was dyed by immersing it in an ethanol solution.

This substrate was washed with ethanol, dried, and then repeated again to obtain a two-color filter.

When a liquid crystal cell was assembled and displayed using this substrate, a bright two-color liquid crystal display was obtained.

As mentioned above, the resin used in the present invention only needs to have functional groups generated (disappeared) before and after irradiation with light, and any resin that has such properties may be used (but is not limited to the examples). isn't it.

Further, in the examples, dyes of the a/traquino 7 series are used, but any dye may be used as long as it has a group that reacts with a functional group in the resin.

Further, in the examples, only the case of two colors is described, but by repeating the same process, it is possible to create three colors, four colors, etc., and is not limited to the examples.

The color of the dye, 0 degree, etc. can also be changed by changing the structure of the dye, the thickness of the resin film, etc., and are selected according to the purpose.

〔Effect of the invention〕

As described above, the manufacturing method of the present invention basically consists of repeating the three steps of (1) spin-coding the resin, (2) exposing it to light through a mask, and (3) dyeing, which is better than the conventional repeating of five steps. This is a much simpler manufacturing method than the previous manufacturing method.

Therefore, according to the manufacturing method of the present invention, a multicolor color filter can be produced at low cost, and the cost of liquid crystal displays, liquid crystal televisions, etc. can be reduced.

Therefore, the method for manufacturing a multicolor color filter of the present invention is of high industrial value.

that's all Seiko Epson Corporation

Claims (1)

[Claims] A method for producing a multicolor color filter using a photolithography method, characterized in that a reactive dye and a resin that generates (disappears) functional groups by light are used.