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:
Apr. 13, 1999
Filed:
Jun. 30, 1997
Applicant:
Inventor:
Anup Bhalla, Wilkes-Barre, PA (US);
Assignee:
Harris Corporation, Melbourne, FL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; H01L / ;
U.S. Cl.
CPC ...
257197 ; 257139 ; 257152 ; 257155 ; 257163 ;
Abstract
Semiconductor bipolar power devices comprise a control electrode for turning on or off a first source of charge carriers into the device and a p-n junction emitter remote from the first source and acting in correspondence with the condition of the first source. The p-n junction is a heterojunction where the bandgap of the semiconductor material of the emitter side of the junction is less wide than the bandgap of the material on the base side for reducing the emitter injection efficiency in comparison with an otherwise identical device having a homojunction emitter.