Patent ID: 7180705
Filing Date: 2007-02-20
Classification: G11B

Abstract:
1. A thin film magnetic head used for a magnetic recording apparatus comprising a recording medium moving to a predetermined direction of medium movement, the thin film magnetic head comprising: a thin film magnetic coil generating magnetic flux; and a pole layer emitting the magnetic flux generated in the thin film coil to the recording medium, wherein the pole layer comprises a main pole layer having an end surface exposed to a recording-medium-facing surface facing the recording medium, and a uniform width portion determining a recording track width of the recording medium, and the main pole layer comprises a laminate including a first main pole layer portion being disposed on a medium-incoming side in the direction of medium movement and having a first saturated magnetic flux density, and a second main pole layer portion being disposed on a medium-outgoing side in the direction of medium movement and having a second saturated magnetic flux density larger than the first saturated magnetic flux density.