Magnetic recording/reproducing system comprising a glass substra

Details Magnetic recording/reproducing system comprising a glass substra Magnetic recording/reproducing system comprising a glass substra

1989-05-19

1992-01-14

Cashion, Jr., Merrell C.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428694, 428900, 428141, 428432, 360122, 360103, 360135, 2041922, G11B 2300

Patent

active

050809482

ABSTRACT:
A magnetic recording medium comprising a glass substrate and a magnetic thin film thereon is provided for use in a magnetic recording/reproducing system having a flying magnetic head. Floating performance is improved when the glass substrate has a surface roughness Rmax of 10-80 A and the magnetic thin film has a surface roughness Rmax of 50-150 .ANG.. Recording and reproducing information on a magnetic disk is carried out by driving the magnetic disk while keeping a magnetic head floating relative to the disk at a spacing therebetween of up to 0.2 .mu.m.

REFERENCES:
patent: 3516860 (1970-06-01), Simmons
patent: 4608293 (1986-08-01), Wada et al.
patent: 4690846 (1987-09-01), Wada et al.
patent: 4803577 (1988-02-01), Ezaki et al.
patent: 4808455 (1989-02-01), Wada et al.
patent: 4808463 (1989-02-01), Yoshikatsu et al.

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