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. 21, 1999
Filed:
Mar. 09, 1998
Applicant:
Inventors:
Hiroshi Oishi, Annaka, JP;
Keiichiro Asakawa, Annaka, JP;
Assignee:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
148 332 ; 2576202 ; 414936 ; 438959 ; 438401 ; 438462 ;
Abstract
A wafer 1 has a chamfered edge 2 polished to specular glossiness, and a laser mark for indication of crystal orientation is put on the chamfered edge 2. Another laser mark 4 for indication of specification, production number, identification, etc. may be carved as a bar code on the chamfered edge 2. These marks 3, 4 are carved on the chamfered edge 2 by laser marking which does not put any harmful influences on the wafer 1.