Perpendicular magnetic recording head including non-magnetic protruding layer
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United States of America Patent
Stats
-
Dec 25, 2012
Grant Date -
Dec 16, 2010
app pub date -
Jun 12, 2009
filing date -
Jun 12, 2009
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A perpendicular magnetic write head capable of suppressing damage and corrosion of a magnetic pole to secure a stable writing performance is provided. A non-magnetic protruding layer protruding from a main magnetic pole layer (tip portion) toward an air bearing surface side is formed on both sides of the tip portion in a writing track width direction. The non-magnetic protruding layer is located closer to a recording medium than the tip portion during writing operation, and is more likely to be in contact with the writing medium instead of the tip portion. Since the protective film portion covering the tip portion hardly peels off (e.g., compared to the protective film portion covering the non-magnetic protruding layer), the tip portion is hardly damaged or corroded. Since the tip portion is protected physically and chemically by the non-magnetic protruding layer, deterioration of the soft magnetic characteristics of the tip portion is suppressed.
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