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:
Nov. 14, 2006
Filed:
Sep. 09, 2004
Yusuke Nagai, Tokyo, JP;
Masashi Aoki, Tokyo, JP;
Hitoshi Hoshino, Tokyo, JP;
Disco Corporation, Tokyo, JP;
Abstract
A wafer processing method for dividing a wafer having optical devices that are formed in a plurality of areas sectioned by dividing lines formed in a lattice pattern on the front surface, along the dividing lines, which comprises a laser beam application step of applying a laser beam to the wafer along the dividing lines from the side of the back surface thereof to form grooves having a predetermined depth in the back surface; a protective sheet affixing step of affixing a protective sheet to the front surface of the wafer having the grooves in the back surface; a dividing step of dividing the wafer having the protective sheet affixed to the front surface along the grooves; and a grinding step of grinding the back surface of the wafer divided along the grooves in a state of the protective sheet being affixed to the wafer, to remove the grooves.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile