Sputtered carbon overcoat in a thin-film medium and sputtering m

Details Sputtered carbon overcoat in a thin-film medium and sputtering m Sputtered carbon overcoat in a thin-film medium and sputtering m

1994-04-01

1997-10-21

Kiliman, Leszek

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 655, 428 657, 428336, 428408, 428694T, 428694TP, 428694TC, 428695, 428900, 20419712, 2041972, 20429812, 20429813, G11B 566, C23C 1400

Patent

active

056794312

ABSTRACT:
A thin-film magnetic recording medium having a carbon overcoat composed of an overcoat sublayer and an overcoat surface layer is described. The overcoat surface layer is a hydrogen- or nitrogen-containing sputtered carbon layer with high wear-resistance. The overcoat sublayer functions to reduce the diffusion of nitrogen or hydrogen from the surface layer to the magnetic recording layer. Also described is a method of sputtering the nitrogen-containing surface layer in which the graphite target is attached to the target electrode by thermally conducting, electrically conducting materials.

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