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:
Feb. 14, 2012
Filed:
Nov. 19, 2008
Takeshi Kitahara, Gotenba, JP;
Yoshiyuki Nagatomo, Gotenba, JP;
Toshiyuki Nagase, Gotenba, JP;
Yoshirou Kuromitsu, Saitama, JP;
Takeshi Kitahara, Gotenba, JP;
Yoshiyuki Nagatomo, Gotenba, JP;
Toshiyuki Nagase, Gotenba, JP;
Yoshirou Kuromitsu, Saitama, JP;
Mitsubishi Materials Corporation, Tokyo, JP;
Abstract
A method for manufacturing a power module substrate, includes: preparing a ceramics substrate and a metal plate made of pure aluminum; a fusion step in which the ceramics substrate and the metal plate are stacked in layers with a brazing filler metal interposed therebetween, and a fused aluminum layer is formed at an interface between the ceramics substrate and the metal plate by fusing the brazing filler metal which is caused by heating; and a solidifying step in which the fused aluminum layer is solidified by cooling, and a crystal is grown so as to be arranged in a crystal orientation of the metal plate when the fused aluminum layer is solidified.