Patent ID: 7443633
Filing Date: 2008-10-28
Classification: G11B

Abstract:
1. A thin-film magnetic head comprising at least one inductive write head element comprising: a main magnetic pole layer having an inner saturation magnetic flux density varying from both side end surfaces in a track-width direction and a leading end surface of said main magnetic pole layer, toward a center portion in said track-width direction of a trailing end surface of said main magnetic pole layer, for generating a write field; an auxiliary magnetic pole layer having one end portion being adjacent to one end portion of said main magnetic pole layer and the other end portion connected magnetically with the other end portion of said main magnetic pole layer; and at least one coil layer formed in such a way as to pass through between said main magnetic pole layer and said auxiliary magnetic pole layer for inducing a magnetic flux in said main magnetic pole layer and said auxiliary magnetic pole layer, a curvature width W where W T is a track width and a unit of W C and W T is nanometer.