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:
Dec. 05, 1995
Filed:
Jun. 25, 1993
Applicant:
Inventors:
Roland Queriaud, Bretigny sur Orge, FR;
Alain Petitbon, St Arnoult en Yvelines, FR;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
21912164 ; 2191216 ; 21912169 ; 228173 ;
Abstract
A method of bonding copper to a heat conducting and electrically insulating power electronics substrate made of a non-oxide ceramic selected from AlN, SiC, and BN, the method including the steps of oxidizing the surface of the substrate and then directly bonding copper to the oxidized surface of the substrate, wherein the step of oxidizing the surface of the substrate is performed by irradiating the surface using a laser beam to a thickness in the range 0.1 .mu.m to 3 .mu.m.