Magnetic disc with carbon protective layer having regions differ

Details Magnetic disc with carbon protective layer having regions differ Magnetic disc with carbon protective layer having regions differ

1996-08-08

1998-10-20

Resan, Stevan A.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428408, 428694TC, 428694TR, 428900, 360135, G11B 582

Patent

active

058243879

ABSTRACT:
A magnetic disc for use in a disc drive data storage system is disclosed. The magnetic disc includes a layer of magnetic material deposited on a substrate and a carbon overcoat layer deposited on the layer of magnetic material. The carbon overcoat layer has a first hardness over a contact start-stop region of the disc. The carbon overcoat layer has a second hardness over a data storage region of the disc. The second hardness is softer than the first hardness and than a hardness of a diamond like coating on an associated magnetic head so that disc asperities in the data storage region of the carbon overcoat layer will wear upon impact with the magnetic head.

REFERENCES:
patent: 5285343 (1994-02-01), Tanaka et al.
patent: 5353182 (1994-10-01), Nakamura et al.
patent: 5364690 (1994-11-01), Takahashi et al.
patent: 5388020 (1995-02-01), Nakamura et al.
patent: 5397644 (1995-03-01), Yamashita
patent: 5436047 (1995-07-01), Howard et al.
patent: 5446606 (1995-08-01), Brunner et al.
patent: 5520981 (1996-05-01), Yang et al.
patent: 5543203 (1996-08-01), Tani et al.
patent: 5607783 (1997-03-01), Onodera
patent: 5614314 (1997-03-01), Itoh et al.
"Use of Raman Scattering to Investigate Disorder and Crystallite Formation in As-Deposited and Annealed Carbon Films", by R.O. Dillon, J.A. Woollam and V. Katkanant, Physical Review B, vol. 29, No. 6, Mar. 1984, pp. 3482-3489.
"Pulsed Laser Treatment of Diamondlike Carbon Films", by S. Prawer, R. Kalish and M. Adel, Applied Physics Letters, vol. 48, No. 23, Jun. 9, 1986, pp. 1585-1587.

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