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. 30, 2009
Filed:
Feb. 09, 2006
Shigekazu Horino, Osaka, JP;
Chun-hao Tung, Taoyuan, TW;
Hsien-kai Tseng, Taoyuan, TW;
Quanta Display, Inc., , TW;
Quanta Display Japan, Inc., Osaka, JP;
Abstract
The invention provides a novel technology where a TFT array substrate for a display device is formed with three photomasks. The invention is achieved by using the novel technology in combination with a well-known four-masks process. For the novel technology, during the lithography process where a photosensitive acrylic resin film is used to make contacts, taper patterns required for general through holes are formed simultaneously with a fine pattern formed in a light shielding area that is tapered more approximately to vertical, using a photomask with phase-shift effect. Thus the pixel electrode pattern can be separated without using lithography process in subsequent processes.