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:
Oct. 04, 2005
Filed:
Sep. 10, 2003
Yasuhisa Ishikawa, Kanagawa, JP;
Atsushi Watanabe, Kanagawa, JP;
Yukihiro Terada, Kanagawa, JP;
Akira Ikeuchi, Kanagawa, JP;
Hiroshi Oya, Kanagawa, JP;
Yasuhisa Ishikawa, Kanagawa, JP;
Atsushi Watanabe, Kanagawa, JP;
Yukihiro Terada, Kanagawa, JP;
Akira Ikeuchi, Kanagawa, JP;
Hiroshi Oya, Kanagawa, JP;
Mitsumi Electric Co., Ltd., Tokyo, JP;
Abstract
A semiconductor device includes a substrate, a well region formed in the substrate, a field effect transistor formed in the well region, and a diffused region, formed across the well region and the substrate for applying back gate potential to the well region, and forming a PN junction together with its periphery. The field effect transistor and the PN junction are connected between terminals for absorbing excess current so that an internal circuit connected to the terminals is protected.