Title:
MAGNETIC DISK
Document Type and Number:
WIPO Patent Application WO/2007/083792
Kind Code:
A1
Abstract:
Disclosed is a magnetic disk which has a lubricant layer with excellent heat resistance
and high adhesiveness and is free from fly-stiction failure or corrosion failure
even at an extremely low flying height of 10 nm or lower. Also disclosed is a magnetic
disk which has a lubricant layer with good thermal properties and can exert a stable
action over a wide temperature range. The magnetic disk comprises a substrate
(1), and a magnetic layer (3), a carbon-containing protective layer (4) and a
lubricant layer (5) provided on the substrate (1), wherein the lubricant layer
(5) contains a magnetic disk lubricant comprising a compound having a phosphazene
ring and two or more hydroxyl and/or carboxyl groups in the molecule.
Inventors:
TOMIYASU HIROSHI (JP)
SHIMOKAWA KOICHI (JP)
SHIMOKAWA KOICHI (JP)
Application Number:
PCT/JP2007/050886
Publication Date:
July 26, 2007
Filing Date:
January 22, 2007
Export Citation:
Assignee:
HOYA CORP (JP)
TOMIYASU HIROSHI (JP)
SHIMOKAWA KOICHI (JP)
TOMIYASU HIROSHI (JP)
SHIMOKAWA KOICHI (JP)
International Classes:
G11B5/725; C10M105/74; C10M107/48; C10M169/04; G11B5/82; C10N20/04; C10N30/06; C10N30/08; C10N40/18
Domestic Patent References:
| WO2006009057A1 | 2006-01-26 |
Foreign References:
| JP2000260017A | 2000-09-22 | |||
| JP2003217110A | 2003-07-31 | |||
| JP2006070173A | 2006-03-16 | |||
| JP2006307123A | 2006-11-09 |
Attorney, Agent or Firm:
OTSUKA, Takefumi (Ginza Chuo Bldg. 1-20, Tsukiji 4-chom, Chuo-ku Tokyo, JP)
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