A new single-pole-type head with a novel structure has been developed. The head has a set of coil windings located on both sides of the main pole and two return path yokes surrounding the main pole and the coil. This head structure provides high stray field immunity due to a shielding effect of the return yokes. Head, field calculation was performed to design the head in terms of high writability. It was found that the head generates preferable field distribution and the field strength and gradient can be improved by reducing throat height of the main pole and narrowing separation of the main pole and the return yoke, respectively. This was experimentally confirmed with fabricated heads. The 0.2 /spl mu/m-wide head showed a high writing performance.
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Yamakawa et al. (2002) studied this question.
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