MAGNETIC HEAD AND INFORMATION STORAGE DEVICE
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United States of America Patent
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Issued Date -
Nov 27, 2008
app pub date -
Apr 30, 2008
filing date -
May 22, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A magnetic head of the present invention includes a magnetic pole that faces a surface of a recording medium, moves relative to the surface in a direction along the surface, and produces a line of magnetic force intersecting the surface of the recording medium; and a coil that excites the magnetic pole, wherein the magnetic pole includes a laminate with a coercivity of 800 A/m or less, the laminate including two or more layers stacked in a direction along the movement relative to the surface of the recording medium, the two or more layers including a first magnetic layer located at a frontmost position of the movement, and a second magnetic layer located at a rearmost position of the movement, the second magnetic layer having a saturation magnetic flux density higher than a saturation magnetic flux density of the first magnetic layer.
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