Magnetic recording disk medium comprising a magnetic thin film a

Details Magnetic recording disk medium comprising a magnetic thin film a Magnetic recording disk medium comprising a magnetic thin film a

1991-03-05

1993-07-13

Thibodeau, Paul J.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 65, 428336, 428408, 428422, 428694BP, 428900, 428694TC, 428667, G11B 500

Patent

active

052272117

ABSTRACT:
A thin film magnetic disc having a carbon overcoat which is characterized by (a) a thickness of less than about 500 .ANG. and (b) surface nitrogen atoms having a nitrogen (1s) electron principle binding energy, as determined by electron spectroscopy for chemical analysis (ESCA), of about 399.4 eV. The nitrogen atoms enhance lubricant adhesion to the overcoat. In a preferred embodiment, the overcoat is formed by sputtering under an argon/hydrocarbon
itrogen gas atmosphere to produce long resistance-to-erosion times, and high lubricity properties.

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patent: 4833031 (1989-05-01), Kurokawa et al.
patent: 4861662 (1989-08-01), Kobuska
patent: 4960609 (1990-10-01), Homola et al.
patent: 5013579 (1991-05-01), Yamazaki
Caporiccio, Gerardo, "A New Series of Lubricants for Magnetic Recording Media From Bifunctional Perfluoropolyethel Derivatives" Lecture at Symposium on Memory and Advanced Recording Technologies San Jose, Calif. 5-8 May 1986.

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