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. 01, 2015
Filed:
Jan. 15, 2013
Magnetic media with a low molecular weight lubricating layer for use in head/media contact detection
Hgst Netherlands B.v., Amsterdam, NL;
Yoshihiko Ooeda, Yokohama, JP;
Hiroyuki Matsumoto, Chigasaki, JP;
Sukefumi Ito, Odawara, JP;
Yoko Saito, Ishioka, JP;
HGST Netherlands B.V., Amsterdam, NL;
Abstract
According to various embodiments, a lubricating layer for providing lubrication to a magnetic recording medium includes a perfluoropolyether (PFPE) represented by: X—CFCFO(CFO)CFCF—X, wherein m is in a range from 4 to 8 on average, and wherein X is This lubricating layer may be used in a magnetic disk, which includes a recording layer positioned above a nonmagnetic substrate, a protective film layer positioned above the recording layer, and the lubricating layer positioned above the protective film layer. In another embodiment, a method for forming a magnetic disk includes forming a recording layer above a nonmagnetic substrate, forming a protective film layer above the recording layer, and forming a lubricating layer above the protective film layer, the lubricating layer comprising a perfluoropolyether (PFPE) represented by: X—CFCFO(CFO)CFCF—X, wherein m is in a range from 4 to 8 on average, and wherein X is