Alternative DC-burst servo pattern for perpendicular recording
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United States of America Patent
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Jan 6, 2009
Grant Date -
Dec 16, 2004
app pub date -
Nov 6, 2003
filing date -
Jun 13, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention provides a servo pattern that is stable for long time, easily writable, and excellent in S/N. DC-signal area included in a burst area of a servo pattern comprises combination of positive and negative DC-signals, low-density dummy bit, or pattern having phases that are deviated each other so that the sum of magnetization of the burst area of the servo pattern is equalized to 0.
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