Thin film magnetic head

Details Thin film magnetic head Thin film magnetic head

1989-12-27

1991-10-29

Cashion, Jr., Merrell C.

Stock material or miscellaneous articles

Composite

Of inorganic material

428662, 428701, 428702, 428900, G11B 570

Patent

active

050615769

ABSTRACT:
A thin film magnetic head comprises a substrate, a lower magnetic layer, an insulating layer and an upper magnetic layer formed in that order on said substrate, and a protective layer formed on said upper magnetic layer and having an end surface exposed on the running surface directed to a recording medium. The protective layer consists essentially of 20 to 95 mole % of at least two of ZrO.sub.2, TiO.sub.2 and SiO.sub.2 and 5 to 80 mole % of at least one of WO.sub.3 and MoO.sub.3, and has controlled Vickers hardness of 400 to 700 kgf/mm.sup.2 with reduced residual stress of 0.1-0.5 GPa.

REFERENCES:
patent: 4386130 (1983-05-01), Hayashi et al.
patent: 4598053 (1986-07-01), Yamakawa et al.
patent: 4626480 (1986-12-01), Shigeta et al.
patent: 4931214 (1990-06-01), Worrell et al.
patent: 4983465 (1991-01-01), Shimizu et al.

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