Patent ID: 6549370
Filing Date: 2003-04-15
Classification: B82Y,G11B

Abstract:
A thin-film magnetic head comprising:a medium facing surface that faces toward a recording medium; a first magnetic layer including a pole portion and a second magnetic layer including a pole portion, the first and second magnetic layers being magnetically coupled to each other, the pole portions being opposed to each other and placed in regions of the magnetic layers on a side of the medium facing surface, each of the magnetic layers including at least one layer; a gap layer provided between the pole portions of the first and second magnetic layers; and a thin-film coil at least a part of which is placed between the first and second magnetic layers, the at least part of the coil being insulated from the first and second magnetic layers; wherein: the first magnetic layer includes: the pole portion touching the gap layer; a flat portion located at a distance from the gap layer in the direction of thickness of the gap layer, and located farther from the medium facing surface than the pole portion; and a sloped portion connecting the pole portion and the flat portion to each other, the distance from the sloped portion to the gap layer decreasing with decreases in the distance from the sloped portion to the medium facing surface; the first magnetic layer defines a throat height; the at least part of the thin-film coil is located on a side of the pole portion and the sloped portion of the first magnetic layer; and the second magnetic layer includes a flat layer that touches a flat surface including the gap layer and defines a track width.