| 摘要 |
PROBLEM TO BE SOLVED: To provide a ring type composite integrated thin-film magnetic head capable of achieving high density and high speed transfer of 100 bpsi and 1 Gbps or higher in combination with a single layer vertical medium having low noise. SOLUTION: Both rectangular plates of the longitudinal laminated layer thin film of a leading core, and the horizontal thin film of a trailing core constitute a T-shaped narrow gap ring head. A one-turn coil is wound on the tip of the leading core, and its Bs is high. Thus, a recording point is located at the gap edge thereof, and the slope is steep. This exhibits a high linear density vertical recording characteristic as a single pole ring head. The film forming layer of a main magnetic pole longitudinal laminated layer film directly becomes a sub-quarter micron precision width, achieving a high track density. Also, a high speed is obtained by eddy current reduction by the thin film, and the magnetic flux flow of only magnetization rotation by the laminated layer film. The T-shaped structure is made by the integrated thin film process of two stages orthogonal to each other. Then, lateral thin film cores, and for example, a shield type MR reader or the like are integrated on an embedded wafer formed by slicing a block obtained by integrating, stacking and glass-welding longitudinal laminated layer film cores on a virgin wafer.
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