发明名称 |
Perpendicular magnetic recording media with reduced-noise soft magnetic underlayer |
摘要 |
The present invention provides perpendicular recording media having a soft magnetic underlayer and magnetic regions which generate an external magnetic field in the soft magnetic underlayer. The soft magnetic underlayer is brought into a substantially single-domain state by the magnetic field, thereby reducing or eliminating unwanted noise in the soft underlayer. In a preferred embodiment, the recording medium includes a ring-shaped soft magnetic underlayer positioned between concentric ring-shaped magnetic regions.
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申请公布号 |
US6531202(B1) |
申请公布日期 |
2003.03.11 |
申请号 |
US20000724112 |
申请日期 |
2000.11.28 |
申请人 |
SEAGATE TECHNOLOGY LLC |
发明人 |
LITVINOV DMITRI;KHIZROEV SAKHRAT;KRYDER MARK HOWARD |
分类号 |
G11B5/62;G11B5/73;(IPC1-7):G11B5/66;G11B5/70;B05D5/12;H01F1/00 |
主分类号 |
G11B5/62 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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