Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1994-12-28

1996-12-10

Thibodeau, Paul

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

428694TR, 428694T, 428694SG, 428611, 428900, 428928, B32B 310, G11B 566

Patent

active

055828973

ABSTRACT:
Proposed is a magnetic recording medium consisting of a non-magnetic substrate and a magnetic recording layer formed thereon by the sputtering method, in which the non-magnetic substrate is a disk of single crystal silicon having a surface substantially in parallel with the crystallographic (111) plane with an angle of deviation not exceeding 15.degree., of which the surface roughness Rp does not exceed 25 nm. By virtue of the use of the unique material for the substrate, the magnetic recording layer is outstandingly stable as compared with conventional aluminum or glass substrates and the magnetic layer formed thereon by sputtering has a greatly improved coercive force of 1300 oersted or higher.

REFERENCES:
patent: 4675240 (1987-06-01), Weiss
patent: 4689260 (1987-08-01), Briska et al.
S. Wolf, R. N. Tauber in Silicon Processing for the VLSI Era, p. 21 (1986).

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