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:
Jul. 14, 1992
Filed:
Oct. 09, 1990
Applicant:
Inventors:
Hideaki Yoshida, Saitama, JP;
Yoshirou Kuromitsu, Saitama, JP;
Makoto Toriumi, Saitama, JP;
Michio Yuzawa, Saitama, JP;
Assignee:
Mitsubishi Metal Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05K / ;
U.S. Cl.
CPC ...
174252 ; 174256 ; 361388 ;
Abstract
A ceramic substrate is used for an electric or electronic circuit comprises a ceramic plate formed of a substance mainly composed of aluminum nitride, and conductive islands formed of aluminum or an aluminum alloy and bonded to one surface of the ceramic plate for providing conductive paths to circuit components connected thereto, wherein the aluminum islands decrease the total weight of the ceramic substrate and enhance a resistance against repetition of a thermal stress.