Magnetic medium for horizontal magnetization recording and metho

Details Magnetic medium for horizontal magnetization recording and metho Magnetic medium for horizontal magnetization recording and metho

1987-08-18

1988-05-10

Pianalto, Bernard D.

Chemistry: electrical and wave energy

Processes and products

Coating, forming or etching by sputtering

428457, 428694, 428900, C23C 1400

Patent

active

047433485

ABSTRACT:
A magnetic medium for horizontal magnetization recording which comprises a non-magnetic substrate and a magnetic recording film formed on at least one side of the substrate, is described. The magnetic recording film consists essentially of an amorphous Co-Cr alloy containing from 5 to 15 atomic percent of oxygen atom. A method for making the above type of medium is also described in which the magnetic film is vapor deposited under conditions of a partial pressure of oxygen gas of 1.times.10.sup.-3 to 3.times.10.sup.-3 Torr., and a sputtering rate of from 0.05 to 0.15 .mu.m/minute.

REFERENCES:
patent: 4323629 (1982-04-01), Kunieda et al.
patent: 4382110 (1983-05-01), Takagi et al.
patent: 4385098 (1983-05-01), Sugita et al.
patent: 4511635 (1985-04-01), Nagao et al.
patent: 4592948 (1986-06-01), Kohmoto et al.
patent: 4596735 (1986-06-01), Noguchi et al.
patent: 4599280 (1986-07-01), Izumi et al.
Sugita et al, "CoCr Perpendicular Recording Medium by Vacuum Deposition", IEEE Journal, Nov. 1981, pp. 3172-3174.

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