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. 05, 1998
Filed:
Jul. 02, 1996
Seiichi Oshima, Fukuoka, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
In order to obtain a miniature unit having a simple structure which can operate at a high speed at a low cost, a copper pattern (225) provided on a power substrate (221) having a DBC substrate structure is exposed on an outer surface of the unit. Thus, it is possible to discharge heat which is generated in a main circuit of the unit to the exterior without providing a copper base plate by mounting the unit so that the pattern (225) is directly in contact with an external heat slinger or the like. The power substrate (221) is not deformed following its temperature change, since no copper base plate is required. Thus, no S-bent structure is required for a terminal which is connected with the circuit or the like, whereby speed increase and miniaturization are enabled, while the structure is simplified since no silicone gel is required.