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. 30, 2004
Filed:
Apr. 30, 2003
Applicant:
Inventor:
Mitsutaka Hano, Tokyo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H03K 3/00 ;
U.S. Cl.
CPC ...
H03K 3/00 ;
Abstract
A bootstrap circuit includes at least a chargeable semiconductor element region (D ) and a drift region (Rn, ) of a high-tension island, and junction between the chargeable semiconductor element region and the high-tension island drift region is isolated, and the high-tension island drift region has n+ layers ( ) provided at a high-tension side and at an opening portion in an n− semiconductor layer ( ) of a high-tension island, and thus an ON operation of a parasitic transistor can be prevented to thereby reduce a current consumption of the circuits.