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:
Aug. 14, 1990
Filed:
Apr. 19, 1983
Applicant:
Inventor:
Mitsuo Sekiya, Tokyo, JP;
Assignee:
Disco Abrasive Systems, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B24B / ;
U.S. Cl.
CPC ...
5128 / ; 51325 ; 125 1101 ; 125 1119 ;
Abstract
A dresser made of bonded alundum-type abrasive is ground by a rotating blade made of bonded super abrasive to dress the blade. The surface of a semiconductor wafer is ground by the rotating dressed blade to convert it into a matte-finished surface substantially free from saw marks.