Magnetic record member and process for manufacturing the same

Details Magnetic record member and process for manufacturing the same Magnetic record member and process for manufacturing the same

1979-12-12

1982-04-20

Pianalto, Bernard D.

Dynamic magnetic information storage or retrieval

Record medium

Disk

427130, 427131, 427132, 428 64, 428332, 428339, 428450, 428599, 428631, 428652, 428680, 428693, 428694, 428900, 428928, G11B 582

Patent

active

043262295

ABSTRACT:
An improved magnetic disk recording device having a smooth recording medium layer covered with a protective film layer whose surface is formed with radially extending sinusoidal jogs or undulations defining a surface roughness greater than that of the underlying recording medium. These jogs act to avoid wear due to the adhesiveness between the device and a recording or reproducing head. The jogged protective film layer is formed by using a solvent of specified boiling point in a spin-coating process.

REFERENCES:
patent: 3055770 (1962-09-01), Sankuer et al.
patent: 3466156 (1969-09-01), Peters et al.
patent: 3516860 (1970-06-01), Simmons
patent: 4069360 (1978-01-01), Yanagisawa et al.
patent: 4124736 (1978-11-01), Patel et al.
patent: 4133911 (1979-01-01), Koester et al.
patent: 4154875 (1979-05-01), Yanagisawa et al.
patent: 4171399 (1979-10-01), Allen et al.
patent: 4188434 (1980-02-01), Loran

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