The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 24, 1997
Filed:
Jan. 16, 1996
Pao-Ju Hsieh, Keelung, TW;
Hsien-Kuang Lin, Taipei, TW;
Jim-Chyuan Shieh, Hsinchu, TW;
Chao-Wen Niu, Hsinchu, TW;
Chao-Huei Tseng, Taipei, TW;
Hwa-Chi Cheng, Hsinchu, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
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.