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:
Oct. 25, 2005
Filed:
Feb. 21, 2003
Toru Yamazaki, Tokyo, JP;
Tetsuya Baba, Tokyo, JP;
Osamu Murata, Tokyo, JP;
Nihon Microcoating Co., Ltd., Tokyo, JP;
NTT Advanced Technology Co., Ltd., Tokyo, JP;
Abstract
A polishing film includes a plastic film and a polishing layer formed on its surface, having a mixture of a first group of silica particles with a first average diameter and a second group of silica particles with a second average diameter fixed in a resin binder, the first average diameter and the second diameter being different from each other and both within a range of 0.001-10 μm. The mixture of the two groups of silica particles has a granularity distribution curve with two peaks at two different diameter values corresponding to the first and second average diameters.