Recording head with dual coil/dual shield arrangement and high frequency oscillator

摘要

According to one embodiment, a recording head includes a main pole, a trailing shield including a first connecting portion and a second connecting portion, and configured to form together with the main pole a first magnetic core, a leading shield including a first connecting portion connected to the main pole through a magnetic material and an end portion opposing to the end portion of the main pole through a non-magnetic material, and configured to form together with the main pole a second magnetic core, and first and second coils wound around the first and second magnetic cores, and a connection terminal configured to flow a current through the main pole, non-magnetic conductive layer, and trailing shield.

主权项

1. A recording head comprising:
a main pole configured to apply a recording magnetic field in a direction perpendicular to a recording layer of a recording medium; a trailing shield on a trailing side of the main pole with a write gap therebetween, comprising a first connecting portion connected to the main pole through a non-conductor and a second connecting portion connected to an end portion of the main pole on the recording medium side through a non-magnetic conductive layer, and configured to form together with the main pole a first magnetic core; a first coil wound around the first magnetic core; a leading shield on a leading side of the main pole, the leading shield having a substantially L-like shape comprising an upright portion extending in parallel to the main pole and a lower end portion extending along a medium facing surface from an end of the upright portion on the recording medium side to a position close to the end portion of the main pole on the recording medium side such that a closed magnetic path that includes the main pole and the leading shield is formed, the lower end portion of the leading shield comprising a lower end surface exposed on the medium facing surface and a trailing side end surface facing the end portion of the main pole on the recording medium side through a non-magnetic material disposed in a gap therebetween, and the leading shield being configured to form, together with the main pole, a second magnetic core; a third connecting portion connected to the upright portion and the main pole, the third connecting portion comprising a magnetic material; a second coil wound around the second magnetic core; and a connection terminal configured to flow a current through the main pole, the non-magnetic conductive layer, and the trailing shield.