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:
Mar. 04, 2014
Filed:
Oct. 04, 2011
Yoshihiko Ooeda, Yokohama, JP;
Yuzuru Shimazaki, Tokai-mura, JP;
Mina Amo, Hitachi, JP;
Yuichi Aoki, Sagamihara, JP;
Robert Waltman, Gilroy, CA (US);
Yoshihiko Ooeda, Yokohama, JP;
Yuzuru Shimazaki, Tokai-mura, JP;
Mina Amo, Hitachi, JP;
Yuichi Aoki, Sagamihara, JP;
Robert Waltman, Gilroy, CA (US);
HGST Netherlands B.V., Amsterdam, NL;
Abstract
In one embodiment, a magnetic disk medium includes a nonmagnetic substrate, a magnetic recording layer above the nonmagnetic substrate, a protective layer above the magnetic recording layer, and a lubricant layer above the protective layer, the lubricant layer including a mixture of a compound having one or more cyclophosphazene groups and a lubricant formulated R1-OCHCFCFO(CFCFCFO)CFCFCHO—R2, wherein R1 and R2 are alkyl chains having at least two hydroxyl groups each, and m is an integer indicating a number of repeating units. According to another embodiment, a magnetic disk medium lubricant includes a mixture of a compound having one or more cyclophosphazene groups and a lubricant formulated as above, such that a magnetic head is provided stable flight above the lubricant layer in conditions having relative humidity of greater than about 40%.