Invention Grant
- Patent Title: Magnetic recording medium having lands with curved upper surfaces and magnetic recording and reproducing apparatus
- Patent Title (中): 磁记录介质具有带曲面上表面的平台和磁记录和重放装置
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Application No.: US11780521Application Date: 2007-07-20
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Publication No.: US07936536B2Publication Date: 2011-05-03
- Inventor: Ryuji Tsuchiyama , Masahumi Mochizuki , Kyosuke Ono , Yuko Tsuchiya , Hiroshi Ikekame
- Applicant: Ryuji Tsuchiyama , Masahumi Mochizuki , Kyosuke Ono , Yuko Tsuchiya , Hiroshi Ikekame
- Applicant Address: JP Tokyo
- Assignee: Hitachi, Ltd.
- Current Assignee: Hitachi, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Antonelli, Terry, Stout & Kraus, LLP.
- Priority: JP2006-229709 20060825
- Main IPC: G11B5/68
- IPC: G11B5/68 ; G11B5/82

Abstract:
In a discrete track medium and a patterned medium, a meniscus adsorptive force is reduced and writing into adjacent tracks is prevented. A magnetic layer in lands or patterns in the discrete track medium or the patterned medium is formed into a cylindrical shelly or spherical shelly shape with a uniform thickness. Moreover, a height of cylindrical shelly land or a height of spherical shelly land is changed between 5 nm and 30 nm according to radial positions. Thus, an effect is achieved for providing a magnetic recording medium and a magnetic disk apparatus which are excellent in realizing higher recording density and higher reliability.
Public/Granted literature
- US20080049359A1 MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING AND REPRODUCING APPARATUS Public/Granted day:2008-02-28
Information query
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