Patent ID: 8300346
Filing Date: 2012-10-30
Classification: G11B

Abstract:
1. A thin film magnetic head provided with a writing magnetic field generation means having a main pole, an auxiliary pole, and a coil wound between the main pole and the auxiliary pole, comprising: a microwave radiator provided between the main pole and auxiliary pole and in the vicinity of an opposing medium surface facing a magnetic recording medium that is a recording target; and a nonmagnetic dielectric layer filling a gap between the main pole and the auxiliary pole to embed the microwave radiator, wherein the nonmagnetic dielectric layer has an inclined surface at an end on a side of the opposing medium surface by which a microwave radiated from the microwave radiator is bent toward a side of the main pole, wherein the inclined surface of the nonmagnetic dielectric layer formed at the end on the side of the opposing medium surface is downwardly inclined toward the main pole by an angle θ, and the angle θ is set in a range of approximately 10 to 20° when viewed from a cross-section cut in a perpendicular direction with respect to a track width direction and when the opposing medium surface is disposed to face downwardly.