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. 15, 2002
Applicant:
Jun Takayasu, Yokkaichi, JP;
Inventor:
Jun Takayasu, Yokkaichi, JP;
Assignee:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L021/302 ; H01L021/461 ;
U.S. Cl.
CPC ...
Abstract
An abrasive for a semiconductor device comprises cerium oxide particles and coating materials. The cerium oxide particles are made principally of cerium oxide (CeO). The coating materials cover the surface of the cerium oxide particles.