Longitudinal magnetic recording head with reduced side fringing
AssigneeSeagate Technology LLC
InventorSharat Batra
Life of this patent
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Abstract
A longitudinal recording head for use with magnetic recording media includes first and second writes poles in which the second pole has sides that wrap around a portion of the first pole in order to reduce or eliminate side fringing fields. The wrapped around sides of the second pole have relatively small cross sections away from the air bearing surface of the recording head, and relatively large cross sections at the air bearing surface. The sides may saturate in the narrow regions away from the air bearing surface, but do not saturate in the broad regions adjacent the air bearing surface. Longitudinal recording heads incorporating the wrapped around second pole sides effectively reduce or eliminate side fringing and are capable of improved recording densities.
Claims12
A longitudinal recording head for use with a magnetic recording medium, the longitudinal recording head comprising:
- first and second write poles defining a gap therebetween, wherein sides of the second write pole are wrapped around a portion of the first write pole;
- and
- means for propagating magnetic flux through the wrapped around sides of the second write pole such that portions of the wrapped around sides of the second pole located at an air bearing surface of the recording head do not saturate when portions of the wrapped around sides located away from the air bearing surface saturate.
A longitudinal recording head for use with a magnetic recording medium, the longitudinal recording head comprising:
- a first write pole;
- and
- a second write pole defining a gap between the first and second write poles, wherein sides of the second pole are wrapped around a portion of the first pole, and the wrapped around sides have a cross sectional area located at an air bearing surface of the recording head that is greater than a cross sectional area located away from the air bearing surface.
Dependencies are inferred from the claim text.