Invention Grant
US08257845B2 Magnetic recording medium utilizing a recording layer having more and less concentrated parts of a nonmagnetic element in an in-plane direction and a nonmagnetic layer
有权
利用记录层的磁记录介质，其具有在面内方向上具有越来越少的非磁性元件的集中部分和非磁性层
- Patent Title: Magnetic recording medium utilizing a recording layer having more and less concentrated parts of a nonmagnetic element in an in-plane direction and a nonmagnetic layer
- Patent Title (中): 利用记录层的磁记录介质，其具有在面内方向上具有越来越少的非磁性元件的集中部分和非磁性层
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Application No.: US12378120Application Date: 2009-02-10
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Publication No.: US08257845B2Publication Date: 2012-09-04
- Inventor: Tatsuya Hinoue , Hiroshi Kanai , Toshinori Ono , Hiroyuki Suzuki , Hiroshi Inaba
- Applicant: Tatsuya Hinoue , Hiroshi Kanai , Toshinori Ono , Hiroyuki Suzuki , Hiroshi Inaba
- Applicant Address: NL Amsterdam
- Assignee: Hitachi Global Storage Technologies Netherlands B.V.
- Current Assignee: Hitachi Global Storage Technologies Netherlands B.V.
- Current Assignee Address: NL Amsterdam
- Priority: JP2008-041615 20080222
- Main IPC: G11B5/66
- IPC: G11B5/66
Abstract:
Embodiments of the present invention help to produce discrete track media and bit patterned media having both excellent recording and reproducing performance and reliability. According to one embodiment, a manufacturing method forms a nonmagnetic layer mainly composed of the same element as a nonmagnetic element contained in magnetic recording layers and on the magnetic recording layers and a mask layer having apertures for forming more concentrated parts of the nonmagnetic element in the magnetic recording layers on the nonmagnetic layer. The method implants ions of the nonmagnetic element through the nonmagnetic layer masked by the mask layer to form the more concentrated parts of the nonmagnetic element in the magnetic recording layer.
Public/Granted literature
- US20090214898A1 MAGNETIC RECORDING MEDIUM AND MANUFACTURING METHOD THEREOF Public/Granted day:2009-08-27
Information query
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