Invention Grant
- Patent Title: Hard amorphous carbon film containing ultratrace hydrogen for magnetic recording media and magnetic heads
- Patent Title (中): 用于磁记录介质和磁头的含有超极性氢的硬质无定形碳膜
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Application No.: US14024521Application Date: 2013-09-11
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Publication No.: US09030774B2Publication Date: 2015-05-12
- Inventor: Toru Matsumura , Hiroshi Inaba , Hiroyuki Matsumoto
- Applicant: HGST Netherlands B.V.
- Applicant Address: NL Amsterdam
- Assignee: HGST Netherlands B.V.
- Current Assignee: HGST Netherlands B.V.
- Current Assignee Address: NL Amsterdam
- Agency: Zilka-Kotab, PC
- Main IPC: G11B5/72
- IPC: G11B5/72 ; G11B5/84 ; G11B5/31 ; G11B5/255
Abstract:
A magnetic recording medium according to one embodiment includes at least a ground layer above a non-magnetic substrate; a magnetic recording layer above the ground layer; and an overcoat above the magnetic recording layer, the overcoat characterized in that said overcoat is an amorphous carbon film, wherein a hydrogen content in the overcoat in a center layer thereof in a film thickness direction of said overcoat is from 0.1 atom % to 1.0 atom %. Additional products and methods are also presented.
Public/Granted literature
Information query
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