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:
Apr. 12, 2005
Filed:
Oct. 25, 2000
Applicant:
Satoshi Kitagawa, Kanagawa, JP;
Inventor:
Satoshi Kitagawa, Kanagawa, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K019/06 ;
U.S. Cl.
CPC ...
Abstract
A plurality of minute ID marks are inscribed on a semiconductor wafer which is under manufacture, without imposing adverse effect to the wafer, in order to make the marks less susceptible to surface treatment to be performed during the course of manufacture. Further, the minute ID marks act as mutual backups. Inscribing such minute ID marks on a semiconductor wafer prevents confusion due to effacement of ultra-minute marks and eliminates worry about the impossibility of tracing a semiconductor wafer.