MAGNETIC RECORDING HEAD HAVING THERMAL FLY HEIGHT CONTROL ELEMENT WITH NEAR ZERO MAGNETOMOTIVE FORCE

摘要

A magnetic recording head with thermal fly height control, wherein the heating element is configured to eliminate magnetic field effects on the writing pole, which would cause otherwise cause non-symmetric writing or pole erasure. Non-symmetric writing is a phenomenon wherein magnetic writing favors one direction over another, thereby causing a timing shift in recorded data. The pole erasure is a phenomenon wherein the erasure would occur even without write current. The heating element can be formed as a plurality of electrically conductive layers separated by a non-magnetic, electrically insulating layer such as alumina. The electrically conductive layers are configured so that current flows in opposite directions through each of the electrically conductive layers such that any magnetic field generated by the current flow through one electrically conductive layer is cancelled out by a magnetic field from another electrically conductive layer.

主权项

1. A magnetic recording head, comprising:
a magnetic write element; a magnetic read element; and a thermal heating element, comprising: a plurality of electrically conducive layers separated by an electrically insulating layer, the electrically conductive layers being configured such that electrical current flows through the electrically conductive layers in opposite directions; wherein each of the electrically conductive layers is formed in a bent “U” shape, the bent “U” shape having a base and first and second leg portions, each of each of the first and second leg portion being bent relative to a plane that is parallel with a media facing surface of the magnetic recording head.