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. 22, 2011
Filed:
Sep. 28, 2006
Kota Suzuki, Shinjuku-ku, JP;
Koichi Shimokawa, Shinjuku-ku, JP;
Kota Suzuki, Shinjuku-ku, JP;
Koichi Shimokawa, Shinjuku-ku, JP;
WD Meida (Singapore) Pte. Ltd., Singapore, SG;
Abstract
In order to obtain a magnetic recording disk that exhibits high reliability even if the flying height of a magnetic head becomes very narrow, a lubricant is specified in terms of both molecular structure and quantitative data. That is, a lubricating layerof the magnetic recording diskis formed by a lubricant which contains perfluoropolyether compounds represented by the following chemical formula (Chemical Formula 1) and which has a first component content of 71.7%, a second component content of 15.7%, a third component content of 11.7%, a fourth component content of 0.3%, and a fifth component content of 0.6%:X—OCHCF—(CFO)(CFO)—CFOCHO—X  (Chemical Formula 1)