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:
Jun. 16, 1998
Filed:
May. 19, 1997
Takatoshi Kobayashi, Nagano, JP;
Toshifusa Yamada, Nagano, JP;
Fuji Electric Co., Ltd., Kawasaki, JP;
Abstract
A semiconductor module includes a ceramic substrate for mounting plural semiconductor chips. Even if cracks and cleavages are formed in the ceramic substrate, further damages, such as lowering dielectric or insulation strength is prevented. The semiconductor module includes IGBTs arranged on one ceramic substrate soldered to a metal base plate, and the upper surface of the ceramic substrate is divided into zones. On each zone, a copper foil with one IGBT is mounted. A snap line is formed between the zones to localize the cracks and cleavages formed by bending stress to the snap line. The copper foils on the zones are connected to each other by a conductor bridge disposed over the snap line.