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.:

US 8460994 B1

PDF
Full Text
Expired
Date of Patent:
Jun. 11, 2013

Filed:

Jun. 09, 2006
Applicant:

Ken-ichi Nonaka, Wako, JP;

Inventor:

Ken-ichi Nonaka, Wako, JP;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 21/331 (2006.01);
U.S. Cl.
CPC ...
Abstract

A semiconductor crystal includes a recombination-inhibiting semiconductor layer () of a second conductive type that is disposed in the vicinity of the surface between a base contact region () and emitter regions () and that separates the semiconductor surface having a large number of surface states from the portion that primarily conducts the positive hole electric current and the electron current. Recombination is inhibited, and the current amplification factor is thereby improved and the ON voltage reduced.


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