Method for producing color filters by the use of anionic electro

Details Method for producing color filters by the use of anionic electro Method for producing color filters by the use of anionic electro

1996-04-17

1997-08-19

McPherson, John A.

Radiation imagery chemistry: process, composition, or product th

Radiation modifying product or process of making

Screen other than for cathode-ray tube

205122, G02B 520

Patent

active

056586973

ABSTRACT:
An improved method for making color filter plates from anionic electrocoats is disclosed. It comprises the steps of: (a) forming a positive photoresist layer on an electrically conductive transparent glass substrate; (b) exposing the portions of the glass substrate to be electrodeposited with a designated color electrocoat by removing corresponding portions of the positive photoresist layer using a photomasked light exposure procedure followed by a development procedure with a developer solution; (c) electrodepositing the designated color electrocoat on the exposed portions of the glass substrate; (d) performing a flood exposure on remaining portions of the positive photoresist; (e) performing a postbake procedure by heating the glass substrateto thereby harden the color electrocoat; (f) using a basic developer solution to remove the remaining portions of the positive photoresist; and (g) repeating steps (a) through (f) until all the desired electrocoats are electrodeposited on the glass substrate. The flood exposure step causes the photoresist to undergo a chemical reaction so that it will not crosslink during the postbake step and thus can be readily removed in step (f).

REFERENCES:
patent: 5527649 (1996-06-01), Sato et al.

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