Perpendicular magnetic write head, having side shields coupled to a leading shield and apart from a trailing shield
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United States of America Patent
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Mar 19, 2013
Grant Date -
May 15, 2008
app pub date -
Nov 8, 2007
filing date -
Nov 10, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention provides a perpendicular magnetic write head capable of preventing unintended erasure of information due to spread of a magnetic field for writing. A leading shield, two side shields, and a trailing shield are disposed around (a front end portion of) a main magnetic pole layer. A nonmagnetic layer having a uniform thickness formed by ALD is provided between the front end portion and two side shields. Consequently, intervals are constant in any positions. Spread of magnetic fields for recording in a write track width direction is suppressed sufficiently more than the case where the intervals vary among positions.
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