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. 03, 2000
Filed:
Nov. 19, 1999
Applicant:
Inventors:
Kenneth Wagers, Los Angeles, CA (US);
Ming Zhou, Long Beach, CA (US);
Assignee:
International Rectifier Corp., El Segundo, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ;
U.S. Cl.
CPC ...
257409 ; 257170 ; 257339 ; 257605 ;
Abstract
A semiconductor device includes a guard ring in the termination area that is formed using the same processing steps that form the active area of the device and without requiring additional masking steps or a passivation layer. The guard ring is formed in an opening in the field oxide located in the termination area and is electrically connected to a polysilicon field plate that is located atop a portion of the field oxide region. The guard ring increases the rated voltage of the device without the introduction of a passivation layer.