| 摘要 |
A thin film magnetic head includes an insulating layer having a trench which has a track-width region formed with a track width Tw, and an inclined region having inclined surfaces formed to gradually increase the width dimension of the trench from the track-width region to the surface of the insulating layer. An upper core layer is formed on the inclined surfaces to relieve magnetic flux saturation and suppress the occurrence of write fringing. A lower pole layer, a gap layer, and an upper pole layer are previously formed in the trench of the insulating layer, thereby permitting the formation of a resist layer to a uniform thickness. By using the resist layer, inclined surfaces can be formed in a predetermined shape in the insulating layer with high reproducibility. Therefore, the upper core layer formed on the inclined surfaces can be appropriately separated from the lower pole layer, thereby suppressing the occurrence of write fringing.
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