Hgst Netherlands, B.v.

Yoko Saito

Hiroyuki Matsumoto

Yoshihiko Ooeda

Sukefumi Ito

A lubricant according to one embodiment includes a cyclophosphazene according to chemical formula 1, 

Lubricants providing magnetic head wear reduction and magnetic spacing improvement

In one embodiment, a magnetic recording medium includes a magnetic recording layer adapted to store magnetic information, a protective film positioned above the recording layer, the protective film being adapted to reduce wear to the magnetic recording layer, and a lubricant positioned above the protective film, the lubricant being adapted to provide a stable head-to-disk interface, wherein the lubricant includes a first lubricant, the first lubricant including a material having the following chemical formula: wherein Rf represents: and wherein Y is a repeating chain including carbon and fluorine.

Magnetic recording medium lubricant mixture and systems thereof

According to various embodiments, a lubricating layer for providing lubrication to a magnetic recording medium includes a perfluoropolyether (PFPE) represented by: X&#x2014;CFCFO(CFO)CFCF&#x2014;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&#x2014;CFCFO(CFO)CFCF&#x2014;X, wherein m is in a range from 4 to 8 on average, and wherein X is 

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Ishioka, Japan

Yoko Saito