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:
Mar. 06, 2007
Filed:
May. 06, 2004
Chi-ming Cheng, Tainan, TW;
Chi-Ming Cheng, Tainan, TW;
TPO Displays Corp., Chu-Nan, TW;
Abstract
A method for removing color resist from an exposure alignment mark. In an embodiment, a color resist layer is formed over a color filter substrate with an alignment mark thereon. A concentric tube system is provided with an outer tube surrounding an inner tube. A solvent is injected via the inner tube to contact and dissolve the color resist directly overlying the alignment mark. The dissolved color resist is extracted by the outer tube of the concentric tube system to expose the alignment mark. By repeating the dissolving and extraction steps, all alignment marks on the color filter substrate are consequently uncovered for subsequent exposure alignment.