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:
Mar. 13, 2007
Filed:
Oct. 12, 2004
Applicants:
Hideyo Osanai, Shiojiri, JP;
Takayuki Takahashi, Shiojiri, JP;
Makoto Namioka, Shiojiri, JP;
Inventors:
Assignee:
Dowa Mining Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B 3/00 (2006.01); H01L 23/24 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a metal/ceramic bonding substratewherein a circuit forming metal plateis bonded to one side of a ceramic substrateand a radiating metal base plateis bonded to the other side thereof, a difference in level is provided along the entire circumference of the bonding surface of the ceramic substrateto the metal base plateThe difference in level is provided by forming at least one of a rising portionand a groove portionon and in the metal base plate