Magnetic head for recording and reproducing a signal and compris

Details Magnetic head for recording and reproducing a signal and compris Magnetic head for recording and reproducing a signal and compris

1996-06-18

1999-07-27

Evans, Jefferson

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

427577, 360122, G11B 560, B05D 306

Patent

active

059300779

ABSTRACT:
A magnetic head for recording and reproducing a signal on and from a magnetic recording medium, comprises a slider, a magnetic resistance element supported by the slider, and a protective film provided on a sliding surface of the slider and a surface of the magnetic resistance element facing the magnetic recording medium. The protective film has an intermediate layer formed of at least one element selected from the group consisting of hard carbon, boron, titanium and aluminium, and carbides, nitrides and oxides of silicon, boron, titanium, or aluminum, and an amorphous hard carbon film formed on the intermediate layer. The protective film is 100 .ANG. or less in thickness and the slider is formed of composite ceramic material of Al.sub.2 O.sub.3 and TiC. The intermediate layer is formed by either one of a magnetron sputtering method, a direct current two electrode sputtering method, a high frequency (rf) sputtering method, and an ion beam sputtering method. The amorphous hard carbon film is formed by a rf plasma CVD method. In the protective film thus obtained, the amorphous hard carbon film contains hydrogen of 10 to 30 atomic % and the protective film is 8000 to 10000 kg/mm.sup.2 in Vickers hardness. The magnetic head has a friction coefficient of 0.1 or less between the magnetic head and the magnetic recording medium after 20000 CSS cycles.

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