发明名称 |
Magnetic recording disk drive with actively controlled electric potential at the head/disk interface for wear and durability control |
摘要 |
An electrical potential difference between a slider body and a hard disk of a hard disk drive is eliminated based on the flying-height spacing of the slider body between the slider body and the hard disk. A predetermined bias voltage is applied between the slider body and the hard disk that includes a DC component and an AC component and that is based on the detected flying-height spacing of the slider body. The flying-height spacing can be detected based a minimum slider-to-disk clearance change from a design flying height of the slider at a frequency of the AC component as the DC component of the predetermined bias voltage is varied. Alternatively, the flying-height spacing can be detected based on a minimum electrodynamic response of the slider to a first harmonic of the AC frequency of the AC component as the DC component is varied.
|
申请公布号 |
US2005088772(A1) |
申请公布日期 |
2005.04.28 |
申请号 |
US20030691752 |
申请日期 |
2003.10.22 |
申请人 |
HITACHI GLOBAL STORAGE TECHNOLOGIES NETHERLANDS B |
发明人 |
BAUMGART PETER M.;KNIGGE BERNHARD;MATE MATHEW |
分类号 |
G11B5/60;G11B21/02;G11B21/21;G11B33/00;(IPC1-7):G11B21/02 |
主分类号 |
G11B5/60 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|