Patent ID: 7821737
Filing Date: 2010-10-26
Classification: G11B

Abstract:
1. A thin film magnetic head comprising: a reader including a magnetic shield layer and a read element formed above a substrate; and a writer including a leading side magnetic pole piece and a trailing side magnetic pole piece being opposed to each other through a write gap; wherein a width in a track width direction of said leading side magnetic pole piece at a face in contact with said write gap is smaller than a width in the track width direction of said trailing side magnetic pole piece at a face in contact with said write gap, and a width in the track width direction of said leading side magnetic pole piece in a part contiguous to said write gap is made continuously larger, in a direction away from said write gap, and wherein the largest width of said leading side magnetic pole piece is at most about twice the width of said trailing side magnetic pole piece at the face in contact with said write gap.