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:
Sep. 12, 2000
Filed:
Mar. 18, 1999
Dietrich Richter, Berlin, DE;
Peter Straub, Oberwil/Zug, CH;
Marian Lancki, Berlin, DE;
Peter Diehm, Hagendorn/Cham, CH;
Dieter Berchtold, Purgen, DE;
Hans-Georg Wissmeier, Munchen, DE;
Siemens AG, Munich, DE;
Abstract
A circuit-board overlaid with a copper material on both sides with a lead-tin layer on the copper material and a plate-shaped heat sink (6). To achieve desirable dissipation of heat generated by electronic components on such circuit-board, the heat sink (6) is provided with a copper surface and then a layer of silver (8) applied to it is soldered to one side of the circuit-board (1). In a method of fabricating the circuit-board, a heat sink (6) having a copper surface is provided with a silver layer (8) and is applied to the circuit board (1) with its side (7) having the silver layer (8) The heat sink (6) is pressed with the circuit board (1) and a heated platen (20) in close contact with the heat sink (6).