Magnetic heads for perpendicular recording and magnetic recording disk apparatus using the same
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United States of America Patent
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-
Nov 2, 2004
Grant Date -
Aug 14, 2003
app pub date -
Dec 9, 2002
filing date -
Feb 14, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A single-pole type magnetic head for perpendicular recording which reduces the amount of side writing even in the presence of a yaw angle and prevents the effective track width from decreasing, and a magnetic recording disk apparatus using the same. A main pole is composed of at least two portions where the width of the first portion continuously increases from the upstream side to the downstream side in the medium moving direction and the width of the second portion is the same as the width of the first portion's downstream edge in the medium moving direction and is constant from the upstream side to the downstream side in the medium moving direction. This prevents the recording magnetic field strength from decreasing at the track edge and increases the effective track width while suppressing side writing, thereby realizing a magnetic recording disk apparatus with a high track density.
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