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:
Jul. 29, 1997
Filed:
Jul. 05, 1994
Tetsuya Ootsuki, Nagano-ken, JP;
Norikata Hama, Nagano-ken, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A semiconductor device with a convex heat sink comprises: a semiconductor element disposed within a space formed by leads of a lead frame, the semiconductor element having bonding pads connected to the leads through wires respectively; a convex heat sink made from a high heat-conductive material and formed so as to have an outer periphery of a size sufficiently large to overlap the leads, the semiconductor element being disposed at a center portion of the heat sink; an insulator disposed on the leads and for bonding and fixing the semiconductor element to the heat sink; and a package of resin for sealing except part of the leads and the top surface of a projecting portion of the heat sink; wherein the insulator has a shape like a tape so as to cover part of the leads and extend along a bottom surface near a circumferential edge of the heat sink, and the side surface of the projecting portion of the heat sink is scraped out into a curved surface.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile