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:
Sep. 04, 2007
Filed:
Jan. 27, 2003
Yutaka Ishiwata, Tokyo, JP;
Kosoku Nagata, Tokyo, JP;
Toshio Shimizu, Tokyo, JP;
Hiroyuki Hiramoto, Tokyo, JP;
Yasuhiko Taniguchi, Tokyo, JP;
Kouji Araki, Tokyo, JP;
Hiroshi Fukuyoshi, Tokyo, JP;
Hiroshi Komorita, Tokyo, JP;
Yutaka Ishiwata, Tokyo, JP;
Kosoku Nagata, Tokyo, JP;
Toshio Shimizu, Tokyo, JP;
Hiroyuki Hiramoto, Tokyo, JP;
Yasuhiko Taniguchi, Tokyo, JP;
Kouji Araki, Tokyo, JP;
Hiroshi Fukuyoshi, Tokyo, JP;
Hiroshi Komorita, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kawasaki-shi, JP;
Abstract
An insulating substrate () has insulative ceramic layers () laid one upon another, an intermediate layer () made of a material that is different from a material of the ceramic layers and arranged between adjacent ones of the ceramic layers to join the adjacent ceramic layers to each other, a first conductive layer () joined to the top surface of a top one of the ceramic layers, and a second conductive layer () joined to the bottom surface of a bottom one of the ceramic layers. Even if any one of the ceramic layers has strength lower than design strength and causes a breakage due to, for example, thermal stress, the remaining ceramic layers are sound to secure a specified breakdown voltage for the insulating substrate.