发明名称 |
Magnetic disk device and method of manufacturing same |
摘要 |
A magnetic disk drive device that includes a disk-shaped medium with a magnetic film formed on a surface for recording or reproducing information, and a magnetic head for recording on and reproducing information from the disk-shaped medium. The disk-shaped medium has a data recording region and a control signal recording region. The data recording region is impressed to have convex recording regions for recording data and concave guard bands for separating adjacent recording regions. The control signal recording region has impressed concavities and convexities representing tracking marks (for effecting tracking control of the magnetic head), track number indicating marks and track numbers (for identifying the tracks), and clock marks dividing one circumference into equal intervals along a path of angular movement of the magnetic head. The disk-shaped medium has reduced track pitch and increased recording capacity because the concave guard bands can be very narrow without inducing crosstalk, and the tracking marks, track number indicating marks, and clock marks are impressed as concavities and convexities along the path of angular movement of the magnetic head.
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申请公布号 |
US6144517(A) |
申请公布日期 |
2000.11.07 |
申请号 |
US19990325236 |
申请日期 |
1999.06.03 |
申请人 |
SONY CORPORATION |
发明人 |
WATANABE, KENJIRO;TAKEDA, TORU;SEKO, SATORU;KAWAZOE, KAZUSHIGE;MUTO, TAKAYASU;MORITA, OSAMU;HAYASHI, NOBUHIRO;ISHIDA, TAKEHISA;ISHIOKA, HIDEAKI;YAMAKOSHI, TAKAMICHI |
分类号 |
G11B5/09;G11B5/008;G11B5/012;G11B5/55;G11B5/596;G11B5/64;G11B5/73;G11B5/82;G11B5/84;G11B20/10;G11B20/12;G11B20/18;G11B21/10;G11B25/04;G11B27/19;G11B27/30;G11B33/14;(IPC1-7):G11B5/596 |
主分类号 |
G11B5/09 |
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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