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:
Aug. 17, 2004
Filed:
Oct. 20, 1999
Applicant:
Inventor:
Kaoru Narita, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 2/1332 ;
U.S. Cl.
CPC ...
H01L 2/1332 ;
Abstract
A protection circuit prevents a circuit component from static charge unavoidably applied to a signal terminal, and includes a vertical bipolar transistor having an n-type deep well serving as an emitter region, a p-type well formed on the n-type deep well and serving as a base region and an n-type impurity region formed in the p-type well and serving as a collector region so as to reduce a base resistance regardless of a shallow trench isolation.