Floating magnetic head

Details Floating magnetic head Floating magnetic head

1993-03-31

1994-09-13

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

G11B 560, G11B 2121

Patent

active

053474120

ABSTRACT:
A floating magnetic head including a non-magnetic substrate having a two-phase structure which substrate is used as a slider so as to enable a coefficient of thermal expansion to be controlled over a wide range. In air bearing surface is made to be properly rough to improve CSS characteristics of a floating magnetic head. A non-magnetic substrate material contains MnO, NiO, as main components, and Al.sub.2 O.sub.3, as a sub composition, or a part of the sub component is replaced by at least one substance selected from a group consisting of CaO, Y.sub.2 O .sub.3, ZrO .sub.3, ZnO, SrO. The non-magnetic substrate material has a two-phase structure including a rock salt type structure of (MnO, NiO) and a spinel structure of (MnO, NiO) Al.sub.2 O.sub.3 or (MnO, NiO) Al.sub.2 O.sub.3 containing at least one substance selected from a group consisting of CaO, Y.sub.2 O.sub.3, ZrO.sub.3, ZnO, SrO. An average grain size of the substrate is from 5 to 15 .mu.m.

REFERENCES:
patent: 4805059 (1989-02-01), Tsuchiya et al.
patent: 5057374 (1991-10-01), Tsuchiya et al.
patent: 5168407 (1992-12-01), Shimizu et al.

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