Magnetic heads disk drives and methods with floating pole tip or shunted pole tip for reduced pole tip erasure
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United States of America Patent
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Mar 30, 2010
Grant Date -
N/A
app pub date -
May 22, 2006
filing date -
May 23, 2005
priority date (Note) -
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Abstract
A write head includes a write return yoke, a write yoke connected to the write return yoke, conductive coils surrounding the write yoke, a write pole tip, and a non-magnetic spacer connecting the write pole tip to the write yoke. The non-magnetic spacer allows for reducing a magnetization of the write pole tip due to a remnant magnetic field in the write yoke. In another embodiment, the write head comprises a write shield, a write return yoke, a write yoke, conductive coils, a write pole tip, and a saturable yoke shunt connecting the write pole tip and the write shield. The saturable yoke shunt directs a limited amount of magnetic flux from the write pole tip to the write shield, such that when there is a remnant magnetic field in the write pole tip, the magnetic flux is directed to the write shield rather than to a disk.
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