Thin film magnetic disc and method of manufacturing the disc

Details Thin film magnetic disc and method of manufacturing the disc Thin film magnetic disc and method of manufacturing the disc

1996-06-03

1999-09-28

Kiliman, Leszek

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 654, 428 655, 428141, 428336, 428694T, 428694TP, 428694TC, 428694TR, 428694TF, 428900, 427130, 2041921, 20419216, 2041922, 20419232, 20419234, 20419235, G11B 566

Patent

active

059585420

ABSTRACT:
A thin film magnetic disc in which dot-like scattered bumps, made of a material different from that of the protective layer, are formed on the protective layer, and a lubricant layer is formed on the surfaces of the protective layer and the scattered bumps. A protective layer excellent in strength and disk durability is obtained by using a material different from that of the bumps. The functions of the protective layer and scattered bumps are separated from each other and make full use of the different materials. Such a protective layer is effective to reduce spacing between a head and the disc.

REFERENCES:
patent: 5082709 (1992-01-01), Suzuki
patent: 5316844 (1994-05-01), Suzuki
patent: 5474830 (1995-12-01), Yamaguchi
patent: 5637393 (1997-06-01), Ueda

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