Title:
垂直磁気記録媒体の製造方法
Document Type and Number:
Japanese Patent JP5807944
Kind Code:
B2
Abstract:
To provide a method for manufacturing a perpendicular magnetic recording medium which has improved electromagnetic conversion characteristics, and thus making it possible to achieve the much higher recording density. Disclosed is a method for manufacturing a perpendicular magnetic recording medium to be used for recording information by a perpendicular magnetic recording system, the perpendicular magnetic recording medium including at least a soft magnetic layer, an underlayer, and a magnetic recording layer on a substrate. In the method, the underlayer is formed by sputtering deposition, including a low-gas-pressure deposited layer deposited at a low gas pressure during the deposition, and a high-gas-pressure deposited layer deposited at a high gas pressure during the deposition. The high-gas-pressure deposited layer is formed of a multilayer deposited by decreasing a deposition rate in a stepwise manner.
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Inventors:
Fukuura Moto
Takashi Koike
Furugun Shigeaki
Masaki Uemura
Takashi Koike
Furugun Shigeaki
Masaki Uemura
Application Number:
JP2010141844A
Publication Date:
November 10, 2015
Filing Date:
June 22, 2010
Export Citation:
Assignee:
Dublin Media Singapore Private Limited
International Classes:
G11B5/851; G11B5/738; G11B5/82
Domestic Patent References:
| JP2010086584A | ||||
| JP2009230837A | ||||
| JP2008276916A |
Attorney, Agent or Firm:
Takeshi Otsuka