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. 13, 1992
Filed:
Apr. 14, 1989
Applicant:
Inventor:
Joseph Pernyeszi, Scotts Valley, CA (US);
Assignee:
Hewlett-Packard Company, Palo Alto, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; H01L / ;
U.S. Cl.
CPC ...
357 38 ; 357 2311 ; 357 35 ; 357 51 ;
Abstract
A semiconductor-controlled rectifier provides an example of a semiconductor device having enhanced resistance to electrical breakdown upon application of high voltage in the forward blocking mode. Enhanced breakdown voltage of 20 percent or more is achieved by having one or more bands of relatively heavier doped semiconductor material within a lighter doped region between the electrical connections to the device. Such high conductivity regions provide termination of the electric field away from the location where electrical breakdown may commence, by shaping the electric field or the depletion region adjacent to the semiconductor junctions.