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:
May. 09, 1995
Filed:
Apr. 07, 1994
Applicant:
Inventor:
Friedhelm Bauer, Suhr, CH;
Assignee:
ABB Management AG, Baden, CH;
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ;
U.S. Cl.
CPC ...
257341 ; 257378 ; 257401 ; 437 40 ; 437233 ; 437913 ;
Abstract
An insulated-gate bipolar transistor (IGBT) is specified, the collector (7) and source regions (8) of which can be produced by means of a self-aligning method. This provides an IGBT which is distinguished by a homogeneous turn-off current distribution. For this purpose, the width W of the source regions (8) is selected to be so small that holes can flow laterally into the surrounding collector region. In this connection it must be ensured that the voltage drop across the PN junction of the source regions and collector regions remains below the inherent forward voltage at any time. In consequence, the IGBT according to the invention is particularly insensitive to latch-up.