Invention Grant
US07986488B2 Magnetic recording disk and disk drive with alternating single-polarity position error signal (PES) blocks for read/write head positioning
有权
具有交替单极性位置误差信号（PES）块的磁记录盘和磁盘驱动器用于读/写头定位
- Patent Title: Magnetic recording disk and disk drive with alternating single-polarity position error signal (PES) blocks for read/write head positioning
- Patent Title (中): 具有交替单极性位置误差信号（PES）块的磁记录盘和磁盘驱动器用于读/写头定位
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Application No.: US12328684Application Date: 2008-12-04
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Publication No.: US07986488B2Publication Date: 2011-07-26
- Inventor: Jonathan Darrel Coker , David Timothy Flynn , Joel Dale Haugen , Neil Krishnaswamy
- Applicant: Jonathan Darrel Coker , David Timothy Flynn , Joel Dale Haugen , Neil Krishnaswamy
- Applicant Address: NL Amsterdam
- Assignee: Hitachi Global Storage Technologies Netherlands B.V.
- Current Assignee: Hitachi Global Storage Technologies Netherlands B.V.
- Current Assignee Address: NL Amsterdam
- Agent Thomas R. Berthold
- Main IPC: G11B5/596
- IPC: G11B5/596 ; G11B5/09
Abstract:
A magnetic recording disk drive has a position-error-signal (PES) servo pattern divided into at least two circumferentially adjacent fields that extend radially across the data tracks and include PES blocks that are DC magnetized in one direction, with each PES block having a magnetization opposite to the magnetization of its radially adjacent neighboring PES blocks. Each PES field is contiguous with and shifted radially relative to its circumferentially adjacent neighbor PES fields. Each PES block has a single DC magnetization, and the length of the magnetization is substantially longer than the length of the magnetizations in the other fields of the servo pattern.
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