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. 13, 1995
Filed:
Jul. 02, 1993
Kiyoshi Arai, Fukuoka, JP;
Yoshio Takagi, Fukuoka, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A first composite substrate including an insulating substrate, a copper pattern, and a copper layer on opposite surfaces is mounted on a metal base plate. A second composite substrate and semiconductor chips are mounted on the first composite substrate and interconnected by wire bonding. The paths of current flowing in the wires and in a copper pattern of the second composite substrate are antiparallel to the paths of current flowing in respective corresponding portions of the first composite substrate. A semiconductor device is produced in which an increasing switching frequency does not increase a surge voltage generated in ON and OFF switching operations.