发明名称 |
Method for thermally writing servo patterns on magnetic media |
摘要 |
A method for thermally writing a magnetic servo pattern on a magnetic disc medium prior to assembling the medium in a disc drive is provided in which the medium is first magnetized in a uniform magnetization direction. A plurality of magnetic domains are then thermally written on the medium, one magnetic domain at a time, by individually heating each magnetic domain with a light beam while exposing the magnetic domain to a magnetic field. The magnetic field has an orientation that is opposite to the uniform magnetization direction. The light beam forms an illumination pattern on the medium having a shape that at least partially defines a boundary of each magnetic domain.
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申请公布号 |
US6879458(B2) |
申请公布日期 |
2005.04.12 |
申请号 |
US20020304924 |
申请日期 |
2002.11.26 |
申请人 |
SEAGATE TECHNOLOGY LLC |
发明人 |
SACKS ALEXEI H.;WANG LI-PING;CURTISS DONALD E. |
分类号 |
G11B5/00;G11B5/55;G11B5/596;(IPC1-7):G11B21/02 |
主分类号 |
G11B5/00 |
代理机构 |
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