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. 24, 1988
Filed:
Jul. 29, 1982
Applicant:
Inventors:
Assignee:
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
1562728 ; 156196 ; 2191 / ; 2191 / ; 427 531 ;
Abstract
Method of joining a semiconductor chip to a chip carrier by cementing or soldering which includes treating an area of the semiconductor chip to be joined to the carrier with a laser beam, adjusting the energy of the laser beam to produce depressions by localizing melting of the semiconductor material of the chip and to at least partially pile melted semiconductor material at the edge of the depression, and applying cement or solder between the treated area of the semiconductor chip and the carrier.