JPH0412465B2 - - Google Patents

Description

[Detailed description of the invention]

[Technical Field of the Invention] The present invention relates to a composition for forming a dyed receptor layer of a color filter, and more particularly to a composition for forming a dyed receptor layer of a color filter, which makes it possible to obtain an image sensor with excellent spectral characteristics. [Technical background of the invention and its problems] Conventionally, color filters for image sensors used in color television cameras, etc., have been made by adding ammonium dichromate ( ADC)
It is manufactured by dyeing a pattern obtained by light irradiation using a photoresist material to which is added. However, when the photoresist materials described above are used to form the dye-receiving layer of a color filter,
Because ADC is included, the waste developer solution discharged after developing the pattern contains a large amount of chromium. Therefore, the chromium must be recovered and treated to make it non-polluting before being disposed of, resulting in an increase in manufacturing costs. Furthermore, materials that use ADC as a photosensitizer have the problem that the exposure amount changes depending on the prebaking temperature, resulting in so-called heat fogging, so manufacturing conditions must be strictly controlled. There is. Furthermore, when proteins such as gelatin and casein are used as the basic polymer, it is difficult to obtain products of consistent quality because they are natural substances. Therefore, there is a problem in that it is difficult to control the pattern in the manufacturing process. [Object of the Invention] The object of the present invention is to solve the above-mentioned problems, and to obtain a color filter that does not require treatment of developer waste during its manufacture, does not cause heat fogging, and has excellent spectral characteristics. An object of the present invention is to provide a composition for forming a color filter receiving layer that is capable of forming a color filter receiving layer. [Summary of the Invention] The composition for forming a color filter receiving layer of the present invention has the following formula: (In the formula, R represents a methyl group or an ethyl group,
X ^- represents an ion of chlorine, bromine, iodine, perchloric acid, acetic acid, methyl sulfate, sulfuric acid, nitric acid or p-toluenesulfonic acid. ) It is characterized by consisting of a photosensitive resin which is polyvinyl alcohol or partially saponified polyvinyl acetate containing 0.1 to 10 mol% of the polyvinyl alcohol derivative units shown in the structural units. In the following, the invention will be explained in more detail. The photosensitive resin used in the present invention is, for example, polyvinyl alcohol or partially saponified polyvinyl acetate, with the following formula: (In the formula, R and X ^- have the same meanings as above.) It can be obtained by reacting a formylstyrylpyridinium salt represented by the following formula. As such a photosensitive resin, for example,
It is possible to appropriately use the photosensitive resins described in Publication No.-5761 and the like. The composition of the present invention contains the styrylpyridinium salt-containing unit in an amount of 0.1 to 10 mol % in the constituent units of polyvinyl alcohol. Furthermore, the degree of saponification of polyvinyl alcohol or partially saponified polyvinyl acetate is preferably 50 to 100%. For example, when manufacturing a color filter for an image sensor using the above composition, the following method can be used. That is, first, on the image sensor whose surface has been smoothed,
The composition of the present invention is formed to a thickness of about 0.5 to 5 μm using, for example, a spinner or silk screen method. Next, after performing a prebaking treatment at 40 to 80°C for 10 to 60 minutes, the film is exposed to light through a shadow mask having a desired pattern. For exposure, use a mercury lamp, for example, to
Light with a wavelength in the 400nm range is transmitted over 50 to 100m.
It is preferable to irradiate at J/cm ² for 1 to 10 seconds. Next, after being immersed in pure water for about 5 to 30 seconds and subjected to development processing, methyl alcohol, ethanol,
Rinse by immersing in isopropyl alcohol for about 5 to 10 seconds, and dry at 60 to 100°C. The image sensor having the desired pattern obtained by the above processing is immersed in an aqueous dye solution maintained at about 40 to 80°C for about 1 to 10 minutes to dye it, and then washed with water to obtain a desired color filter layer. is possible. To obtain a completed color filter, the above process may be repeated. [Effects of the Invention] The color filter formed using the composition of the present invention has excellent patternability and is capable of obtaining clear images. In addition, since the composition of the present invention does not contain harmful metal elements such as chromium, it is easy to dispose of developer waste discharged during the production of color filters, and it is also convenient for manufacturing companies from a sanitary standpoint. It does not have any adverse effects. [Examples of the invention] In the following, examples of the invention are described. Example 1 The surface was smoothed using polyimide resin
A CCD image sensor was prepared. A resin prepared by introducing 0.7 mol% of methyl-γ-styrylpyridinium methyl sulfate into polyvinyl alcohol having a degree of saponification of 87% and a degree of polymerization of 2600 was placed on the smooth surface of the image sensor of this CCD using a spinner to a thickness of 1.0 μm. It was formed with a thickness of . Next, after pre-baking at 40°C for 30 minutes, 150mJ/m
Exposure was carried out under conditions of ^cm2 . This CCD image sensor was immersed in pure water for 20 seconds for development, and then immersed in methyl alcohol for 10 seconds for rinsing treatment at 80°C.
and dried for 30 minutes. It has a predetermined pattern obtained by the above processing.
The CCD image sensor was immersed for 3 minutes in a staining solution consisting of a 2% by weight aqueous solution of Suminol Milling Yellow (manufactured by Sumitomo Chemical Co., Ltd.) maintained at 50°C, and then washed with water. As a result, a CCD image sensor with a uniform and clear yellow pattern was obtained. Examples 2 to 5 A saponification degree of 87 as a composition for forming a dye-receiving layer
%, and a degree of polymerization of 1700, and a composition in which methyl-γ-styrylpyridinium salt was introduced in the amount shown in the table. . Comparative Examples 1-2 Examples 2-5 as dye-receiving layer forming compositions
A color filter was prepared in the same manner as in Example 1, except that a smaller amount of methyl-γ-styrylpyridinium salt was introduced into the polyvinyl alcohol used in Example 1. The composition is shown in Example 2~
5 is shown in the table.

[Table] When the dye-receiving layer forming compositions of Comparative Examples 1 and 2 were used, the dye-receiving layer formed on the substrate was peeled off from the substrate during dyeing, and patterning was impossible. In contrast, the color filters formed using the respective compositions of Examples 2 to 5 were
When examined using a microscope, it was confirmed that the pattern was uniform and clear.

Claims (1)

[Claims] Linear formula (In the formula, R represents a methyl group or an ethyl group,
X ^- represents an ion of chlorine, bromine, iodine, perchloric acid, acetic acid, methyl sulfate, sulfuric acid, nitric acid or p-toluenesulfonic acid. 1. A composition for forming a dye-receiving layer of a color filter, comprising a photosensitive resin which is polyvinyl alcohol or partially saponified polyvinyl acetate, which contains 0.1 to 10 mol % of the polyvinyl alcohol derivative units shown in the following formula in the constituent units.