Invention Grant
- Patent Title: Composite soft underlayer including negative anisotropy material
- Patent Title (中): 复合软底层包括负向各向异性材料
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Application No.: US12872865Application Date: 2010-08-31
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Publication No.: US08455118B2Publication Date: 2013-06-04
- Inventor: Kai-Chieh Chang , Li Tang , Shanghsien S. Rou , Connie Chunling Liu , Bogdan Florin Valcu , Wen Jiang , Tao Zhang
- Applicant: Kai-Chieh Chang , Li Tang , Shanghsien S. Rou , Connie Chunling Liu , Bogdan Florin Valcu , Wen Jiang , Tao Zhang
- Applicant Address: US CA Cupertino
- Assignee: Seagate Technology LLC
- Current Assignee: Seagate Technology LLC
- Current Assignee Address: US CA Cupertino
- Agency: Hollingsworth Davis, LLC
- Main IPC: G11B5/62
- IPC: G11B5/62 ; G11B5/667

Abstract:
An apparatus may include a composite soft underlayer and a perpendicular magnetic recording layer overlying the composite soft underlayer. The composite soft underlayer may include a growth template layer, a negative magnetic anisotropy layer overlying the growth template layer, and a magnetically soft layer overlying the negative magnetic anisotropy layer. In some embodiments, the negative magnetic anisotropy layer includes a plurality of grains, and substantially all the grains have negative magnetic anisotropy along an axis substantially perpendicular to a major plane of the composite soft underlayer. In some embodiments, the negative magnetic anisotropy layer includes a thickness of less than or equal to about 3 nm.
Public/Granted literature
- US20120052327A1 COMPOSITE SOFT UNDERLAYER INCLUDING NEGATIVE ANISOTROPY MATERIAL Public/Granted day:2012-03-01
Information query
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