Method of fabricating magnetic recording thin film head having p

Details Method of fabricating magnetic recording thin film head having p Method of fabricating magnetic recording thin film head having p

1995-06-06

1998-05-05

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

2960315, 427131, G11B 542

Patent

active

057459800

ABSTRACT:
An inductive pinched-gap thin film head (TFH) device having pole-tips which are in substantial contact along their side-edges, thereby precisely defining a pinched-gap segment. The substantial contact between the pole-tips' side-edges effectively eliminates all flux lines emanating from the edges and corners during the write operation. The write magnetic field is thus precisely confined to across the pinched-gap segment. As a result, the written medium track width is accurately defined by the width of the pinched-gap segment with high degree of magnetization coherency and virtual elimination of the track-edge noise. The improved (medium) signal-to-noise ratio facilitates substantial increase of the track density. Photolithographic definition and etching of the gap-vias to the bottom pole-tip, followed by deposition of the top pole-tip, facilitates precise and consistent control of the width of the pinched-gap segment (and the written track) drawn to .ltoreq.1 .mu.m.

REFERENCES:
patent: 4190871 (1980-02-01), Walraven
patent: 4190872 (1980-02-01), Jones, Jr. et al.
patent: 4219853 (1980-08-01), Albert et al.
patent: 4219855 (1980-08-01), Jones, Jr.
patent: 4315291 (1982-02-01), Lazzari
patent: 4321640 (1982-03-01), van Gestel
patent: 4555740 (1985-11-01), Jackson
patent: 4885649 (1989-12-01), Das
patent: 4935832 (1990-06-01), Das et al.
patent: 5012375 (1991-04-01), Nishimura
patent: 5020213 (1991-06-01), Aronoff et al.
patent: 5032945 (1991-07-01), Argyle et al.
patent: 5057957 (1991-10-01), Ito et al.
patent: 5059278 (1991-10-01), Cohen et al.
patent: 5081554 (1992-01-01), Das
patent: 5084794 (1992-01-01), Smith
patent: 5141623 (1992-08-01), Cohen et al.
S.E. Lambert et al., "Reduction of Edge Noise in Thin Film Metal Media Using Discrete Tracks", IEEE Transactions on Magnetics, vol. 25, No. 5, Sep. 1989, pp. 3381-3383.
R.P. Ferrier et al., "The Determination of Transition Noise by Lorentz Electron Microscopy", IEEE Transactions on Magnetics, vol. 25, No. 5, Sep. 1989, pp. 3387-3389.
E. Murdock et al., "Roadmap for 10 Gbit/in.sup.2 Media: Challenges", IEEE Transactions on Magnetics, vol. 28, No. 5, Sep. 1992, pp. 3078-3083.
P. Wang et al., "Thin Film Head With Staggered Pole Tips", IEEE Transactions on Magnetics, vol. 27, No. 6, Nov. 1991, pp. 4710-4712.
S. Wang et al., "Improved High Moment FeAIN/SiO.sub.2 Laminated Materials for Thin Film Recording Heads", IEEE Transactions on Magnetics, vol. 27, No. 6, Nov. 1991, pp. 4879-4881.
F.W.A. Dirne et al., "Soft-Magnetic Multilayers For Video Recording Heads", IEEE Transactions on Magnetics, vol. 27, No. 6, Nov. 1991, pp. 4882-4884.
J. Su et al., "Side Reading Study of Recording Heads", IEEE Transactions on Magnetics, vol. 28, No. 5, Sep. 1992, pp. 2722-2724.
K. Chopra et al., "Track Density Constraints in the Application of MR Head Technology", IEEE Transactions on Magnetics, vol. 28, No. 5, Sep. 1992, pp. 2728-2730.
B.D. Martin et al., "Track-Edge Noise Versus Erasure State", IEEE Transactions on Magnetics, vol. 28, No. 5, Sep. 1992, pp. 3276-3277.
J. Zhu et al., "Side Writing Phenomena in Narrow Track Recording", IEEE Transactions on Magnetics, vol. 28, No. 5, Sep. 1992, pp. 2716-2718.
Dean A. Herman, Jr., "Laminated Soft Magnetic Materials", Abstract No. 299, The Electrochemical Society Conf., Hollywood, FL, Oct. 1989, pp. 428-429.
J. Su et al., "Track Edge Phenomenon In Thin Film Longitudinal Media", IEEE Transactions on Magnetics, vol. 25, No. 5, Sep. 1989, pp. 3384-3386.
Dean A. Herman et al., "Edge-Closed Lamination", Proceedings of the Second International Symposium on Magnetic Materials, Processes, and Devices, Proceedings vol. 92-10; Electrochemical Society, pp. 413-420 (date unknown).

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