Method for producing color filters by the use of anionic electrocoats

摘要

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).