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:
Aug. 15, 2006
Filed:
Sep. 23, 2005
Kohji Andoh, El Segundo, CA (US);
Silvestro Fimiani, Turin, IT;
Fabrizio Rue Redda, Casalle, IT;
Davide Chiola, Redondo Beach, CA (US);
Kohji Andoh, El Segundo, CA (US);
Silvestro Fimiani, Turin, IT;
Fabrizio Rue Redda, Casalle, IT;
Davide Chiola, Redondo Beach, CA (US);
International Rectifier Corporation, El Segundo, CA (US);
Abstract
A fast recovery diode has a single large area P/N junction surrounded by a termination region. The anode contact in contact with the central active area extends over the inner periphery of an oxide termination ring and an EQR metal ring extends over the outer periphery of the oxide termination ring. Platinum atoms are diffused into the back surface of the device. A three mask process is described. An amorphous silicon layer is added in a four mask process, and a plurality of spaced guard rings are added in a five mask process.