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:
May. 25, 1993
Filed:
May. 02, 1991
Hideaki Yoshida, Saitama, JP;
Makoto Toriumi, Saitama, JP;
Hirokazu Tanaka, Saitama, JP;
Masao Umezawa, Saitama, JP;
Michio Yuzawa, Saitama, JP;
Yoshirou Kuromitsu, Saitama, JP;
Mitsubishi Materials Corporation, Tokyo, JP;
Abstract
A ceramic substrate is used for an electric or electronic circuit, and comprises a ceramic foundation and at least one conductive island formed of aluminum or an aluminum alloy and bonded to one surface of the ceramic foundation for providing conductive paths to circuit components connected thereto, wherein the aluminum or aluminum-alloy island is brazed to the ceramic foundation with a brazing alloy selected from the group consisting of aluminum-silicon alloy, aluminum-germanium alloy, aluminum-silicon-magnesium alloy and aluminum-silicon-germanium alloy so that thermal stress between the ceramic foundation and the conductive island is taken up.