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:
Jul. 08, 1986
Filed:
Oct. 29, 1984
Applicant:
Inventors:
Assignee:
Seiko Instruments & Electronics Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B05D / ;
U.S. Cl.
CPC ...
427 86 ; 2041 / ; 427 38 ; 427 57 ; 427 87 ; 427 88 ; 427 89 ; 427 90 ; 427 91 ;
Abstract
A thin film transistor array for a liquid crystal display device is produced by simultaneously forming gate electrodes and picture element electrodes; forming islands of a layered structure comprised of a gate insulating film, a thin semiconductor film and a light shielding film in a single masking step; and forming the gate, source and drain wiring metals in contact windows by the 'lift-off' technique after using a resist film for opening the contact windows. Only three masking steps are required thereby enabling an increase in production yield and a lower production cost as compared to conventional techniques which typically require seven masking steps.