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. 07, 1999
Filed:
Nov. 27, 1998
Applicant:
Inventors:
Assignee:
Fujimi Incorporated, Nishikasugai-gun, JP;
Primary Examiner:
Int. Cl.
CPC ...
B24B / ; H01L / ; H01L / ;
U.S. Cl.
CPC ...
106-3 ; 51307 ; 51308 ; 51309 ; 216 89 ; 438692 ; 438693 ;
Abstract
A polishing composition for polishing a memory hard disk comprising water and at least one abrasive selected from the group consisting of silicon dioxide, aluminum oxide, cerium oxide, zirconium oxide, titanium oxide, silicon nitride and manganese dioxide, which further contains an iron compound dissolved in the composition, said iron compound being selected from the group consisting of iron(III) nitrate, iron(III) sulfate, ammonium iron(III) sulfate, iron(III) perchlorate and an ion salt of an organic acid.