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:
Dec. 17, 2013
Filed:
May. 15, 2009
Yoshirou Kuromitsu, Naka-gun, JP;
Kazuhiro Akiyama, Naka-gun, JP;
Takeshi Kitahara, Gotenba, JP;
Hiroshi Tonomura, Naka-gun, JP;
Yoshirou Kuromitsu, Naka-gun, JP;
Kazuhiro Akiyama, Naka-gun, JP;
Takeshi Kitahara, Gotenba, JP;
Hiroshi Tonomura, Naka-gun, JP;
Mitsubishi Materials Corporation, Tokyo, JP;
Abstract
A power module substrate includes: a ceramics substrate composed of AlN, having a top face; a metal plate composed of pure aluminum and joined to the top face of the ceramics substrate with a brazing filler metal including silicon interposed therebetween; and a high concentration section formed at a joint interface at which the metal plate is joined to the ceramics substrate, having a silicon concentration that is more than five times the silicon concentration in the metal plate.