Perpendicular magnetic recording writer having improved performance and wide area track erasure reliability
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United States of America Patent
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Oct 3, 2017
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app pub date -
Aug 24, 2016
filing date -
Aug 24, 2016
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Abstract
A magnetic writer includes a high magnetic moment write pole layer on a main write pole, the write pole layer including a proximal end recessed from the air bearing surface, and a Wide Area Track Erasure (WATER) reservoir recessed from the proximal end of the write pole layer and transverse to a longitudinal direction of the main write pole. The write pole layer may be conformal in shape to, but have smaller dimensions relative to, the main write pole, such that a distance between their outer surfaces is generally constant in a flare region. The WATER reservoir width, in a cross-track direction, may be greater than or equal to the maximum width of the main write pole.
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