Thin film magnetic head

Details Thin film magnetic head Thin film magnetic head

1989-09-27

1991-01-08

Thibodeau, Paul J.

Stock material or miscellaneous articles

Composite

Of metal

428469, 428694, 428900, 20419216, 360126, G11B 522

Patent

active

049834657

ABSTRACT:
A thin film magnetic head comprises: lower magnetic layer, insulating layer, upper magnetic layer and a protective layer, in this order, on a substrate, and has an end face exposed to a recording medium running surface. The protective layer is comprised of 20 to 75 mole % of ZrO.sub.2 and 25 to 80 mole % of WO.sub.3 (ZrO.sub.2 being partly replaced by Y.sub.2 O.sub.3, MgO, CaO and/or oxides of rare earth elements), with hardness Hv of 400 to 700 kgf/mm.sup.2 adjustable according to selection of composition and residual not more than 0.35 GPa.

REFERENCES:
patent: 4681813 (1987-07-01), Yamada et al.
patent: 4711815 (1987-12-01), Yoshike et al.
patent: 4803338 (1989-02-01), Kumasaka et al.
patent: 4824222 (1989-04-01), Green
patent: 4875987 (1989-10-01), Wada et al.
patent: 4898774 (1990-02-01), Yamashita

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