Patent ID: 7920357

Claim:
A thin-film magnetic head comprising an electromagnetic coil element comprising: a main magnetic pole formed on an element formation surface of a substrate having an opposed-to-medium surface, a write magnetic field generated from an end portion on the opposed-to-medium surface side of said main magnetic pole during write operation of data signals; an auxiliary magnetic pole, a portion distant from an end portion on the opposed-to-medium surface side of said auxiliary magnetic pole magnetically connected to said main magnetic pole; and a write coil formed so as to pass through at least between said main magnetic pole and said auxiliary magnetic pole, for generating the write magnetic field, a part of said write coil having a layered structure of: a resonance coil layer for generating a resonance magnetic field having ferromagnetic resonance frequency of a magnetic recording layer of a magnetic recording medium or having a frequency in the vicinity thereof; and a write coil layer, said resonance coil layer and said write coil layer sandwiching an insulating layer therebetween.