Patent ID: 7206166
Filing Date: 2007-04-17
Classification: G11B

Abstract:
1. A thin film magnetic head including: a thin film coil for generating a magnetic flux; and a magnetic pole layer having a magnetic pole end surface exposed on a recording-medium-facing surface to be faced with a recording medium which moves in a predetermined travel direction, the magnetic pole layer for emitting the magnetic flux generated by the thin film coil onto the recording medium through the magnetic pole end surface, wherein the magnetic pole end surface has a shape which is formed by removing a width increasing region, which has a width increasing gradually or stepwise from an edge of the medium outflow side to an edge of the medium inflow side in the travel direction, from a rectangular region on only one side of the rectangular region alone the width thereof, and the magnetic pole layer includes a track width defining portion which has the magnetic pole end surface and defines a write track width of the recording medium, and the track width defining portion has a portion whose cross section parallel to the recording-medium-facing surface has a smaller portion closer to the magnetic pole end surface.