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:
Nov. 14, 2017
Filed:
Oct. 29, 2015
Applicant:
Seiko Instruments Inc., Chiba-shi, Chiba, JP;
Inventor:
Yoichi Mimuro, Chiba, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 29/66 (2006.01); H01L 29/423 (2006.01); H01L 29/78 (2006.01); H01L 29/08 (2006.01);
U.S. Cl.
CPC ...
H01L 29/42368 (2013.01); H01L 29/66659 (2013.01); H01L 29/7835 (2013.01); H01L 29/0847 (2013.01);
Abstract
Provided is an integrated circuit having a LOCOS-drain type MOS transistor mounted thereon in which, even in the case of poor pattern formation, a withstand voltage is not lowered and a poor withstand voltage does not result. A drain oxide film thicker than a gate oxide film is formed on an active region on a drain side of the LOCOS-drain type MOS transistor, to thereby prevent the withstand voltage of the MOS transistor from being lowered even if the gate electrode reaches the active region on the drain side.