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:
May. 29, 2018
Filed:
Nov. 02, 2015
Applicant:
Wd Media, Llc, San Jose, CA (US);
Inventors:
Assignee:
WD Media, LLC, San Jose, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B 5/725 (2006.01); G11B 5/86 (2006.01); C10M 107/38 (2006.01); C10M 171/02 (2006.01); C10M 177/00 (2006.01); G11B 5/84 (2006.01); G11B 5/82 (2006.01);
U.S. Cl.
CPC ...
G11B 5/725 (2013.01); C10M 107/38 (2013.01); C10M 171/02 (2013.01); C10M 177/00 (2013.01); G11B 5/82 (2013.01); G11B 5/8408 (2013.01); G11B 5/86 (2013.01); C10M 2213/003 (2013.01); C10M 2213/0606 (2013.01); C10N 2220/021 (2013.01); C10N 2230/06 (2013.01); C10N 2240/204 (2013.01); C10N 2250/14 (2013.01); C10N 2280/00 (2013.01);
Abstract
A magnetic disk of is provided, the magnetic disk having at least a magnetic layer, a carbon protective layer, and a lubrication layer sequentially provided on a substrate. In an embodiment, the lubrication layer a film formed by a lubricant having a perfluoropolyether compound A having a perfluoropolyether main chain in the structure and also having a hydroxyl group at the end and a compound C obtained from a reaction between a compound B expressed by: [Chemical formula 1] CF(—O—CF)m-(O—CF)n-OCF[m and n in the formula are natural numbers.] and aluminum oxide.