Industrial Technology Research Institute

Nan Ya Plastics Corporation

Jim-Chyuan Shieh

Hsien-Kuang Lin

Dhei-Jhai Lin

Chao-Wen Niu

Pao-Ju Hsieh

Hsien Kai Lin

Hwa-Chi Cheng

Chao-Huei Tseng

Wen R Lin

Pao J Hsieh

A method for making color filters containing a color matrix with at least three desired colored layers comprising the steps of: (a) forming a positive energy-accumulable photoresist layer on a transparent electrically conductive substrate; (b) pre-conditioning the energy-accumulable photoresist layer to form at least three regions of different initial levels of exposure energy, from a highest to a lowest; (c) using a developer solution to develop and remove the region of the photoresist layer with the highest level of initial exposure energy to thereby cause a corresponding area of the electrically conductive substrate underlying the photoresist to be uncovered; (d) electrodepositing a photo-curable resin of a desired color and a predetermined exposure energy required for curing onto the uncovered area of the substrate; (e) overall-exposing the photoresist layer to a light source so as to impart an incremental exposure energy to all regions of the photoresist layer; (f) using a developer solution to develop and remove the region of the photoresist layer which has accumulatively attained the full exposure energy in step (e) and uncover a corresponding area on the substrate; (g) electrodepositing a photo-curable resin of another desired color onto the uncovered area of the substrate formed in step (f); and (h) repeating steps (e) through (g) until all the desired colored layers are selectively developed on the substrate. The incremental exposure energy is provided in step (e) such that: (i) it enables a region with a next highest initial exposure energy to attain full exposure energy, and (ii) it equals to or exceeds the exposure energy required for curing the photo-curable resin to thereby, at the same time, cause the photo-curable resin to become hardened.

Manufacture of color filters by incremental exposure method

An anionic electrodepositable coating composition for making pigment dispersed color filters comprising: (a) a pigment; (b) a first addition copolymer containing pyrrolidone and hydroxy groups; (c) a second addition copolymer containing carboxyl and hydroxy groups; and (d) a low molecular weight amine. The pyrrolidone-containing monomer can be N-vinyl-2-pyrrolidone or a pyrrolidone-containing acrylate-based monomer represented by the following formula: ##STR1## wherein R is hydrogen atom, or methyl or ethyl group, and n is an integer between 1.about.3. The first addition copolymer has a weight average molecular weight between 1,000 and 20,000 and is prepared from a monomer composition comprising about 0.5.about.90 mole percent of a pyrrolidone-containing unsaturated monomer and about 1.about.50 mole percent of a hydroxy-containing unsaturated monomer. The second addition copolymer has a weight average molecular weight between 5,000 and 60,000 and is prepared from a monomer composition comprising about 5.about.30 mole percent of a carboxyl-containing unsaturated monomer and 1.about.50 mole percent of a hydroxy-containing unsaturated monomer. The pigments in the coating composition were measured to have a weight average secondary particle size of less than 0.25 .mu.m, and a polydispersity of less than 1.05.

Anionic electrodepositable coating composition for pigment dispersed

An electrophoretic positive working photosensitive composition for producing a photoresist pattern on metal base plate comprises a photosensitive compound, in which a photosensitive quinone diazide group is grafted on a polyester, and an acrylic copolymer containing carboxyl group, the composition forms a smooth photoresist film on the plate and has a good adhesion to the surface that no pinehole is found.

Electrophoretic positive working photosensitive composition comprising

A positively working photosensitive composition is disclosed useful for making positively working lithographic printing plates of exceptional wear, printing and solvent-resistant characteristics. The positively working photosensitive composition essentially contains a .beta.-dicarbonyl group and a quinone diazide group.

Positively working photosensitive composition

Disclosed is a photosensitive quinone diazide compound for the preparation of a two component positive working photosensitive electrodeposition composition. As the photosensitive group is grafted on a polyurethane, the photosensitive compound thus synthesized has good flexibility and good compatability with acrylic resin. The electrodeposition composition also has good adhesion to the metal base plate when it is coated thereon by electrodeposition means.

Positive working photosensitive composition and photosensitive

An aqueous alkali developable photoresist composition consists of (a) a carboxyl group-containing polymeric binder, (b) 1-15% by weight of a photoinitiator based on the binder, (c) 20-100% by weight based on the binder, of a photo reactive monomer or oligomer containing at least two ethylenically unsaturated double bonds, and (d) 0.05-5% by weight based on the binder of a weak alkali soluble or dispersible thiol compound represented by

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Hsinchu, Taiwan

Jim-Chyuan Shieh