| 摘要 |
A thin film magnetic head includes: a lower magnetic pole (8); an upper magnetic pole (16) disposed to face the lower magnetic pole; a recording coil disposed between the lower magnetic pole and the upper magnetic pole, the recording coil being spaced from the both magnetic poles; and an upper tip sub-magnetic pole (22) provided at the side of the lower magnetic pole of the upper magnetic pole in the vicinity of a floating surface (ABS). In the first aspect, the upper magnetic pole and the upper tip sub-magnetic pole are disposed in such a manner that an end portion at the side of the floating surface of the upper magnetic pole recedes from an end portion at the side of the floating surface of the upper tip sub-magnetic pole. In the second aspect, a portion of the upper magnetic pole in the vicinity of the floating surface is formed to be narrower than the other portion of the pole, and to be wider than a core width of the upper tip sub-magnetic pole. Moreover, both corner portions at the lower magnetic pole side of the pole of the upper magnetic pole are chamfered and formed in a tapered shape. According to the thin film magnetic head having such a structure, a sub peak which is not preferable in a recording magnetic field can be substantially eliminated, and it is possible to realize an improvement in a recording blur characteristic and a good overwrite characteristic.
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