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:
Oct. 22, 2002
Filed:
Nov. 02, 2001
Kazuaki Sorimachi, Saitama, JP;
Masayoshi Kikuchi, Toyko, JP;
Citizen Watch Co., Ltd., Tokyo, JP;
Abstract
A resin sealed semiconductor device includes a heat radiation member fixed to a saling resin. The heat radiation member is formed of a clad material including a first metal having a coefficient of linear expansion close to that of the sealing resin, and a second metal laminated on the first metal and having good adhesive property to the sealing resin. Thus, the heat radiation member can satisfy all three conditions required for the heat radiation member at a satisfactory level, i.e., (1) heat conductivity being excellent, (2) a difference of a coefficient of linear expansion between the heat radiation member and a sealing resin being small, and (3) adhesive property to the sealing resin being good.