High-coercivity thin-film recording medium

Details High-coercivity thin-film recording medium High-coercivity thin-film recording medium

1990-12-12

1991-09-17

Dean, R.

Stock material or miscellaneous articles

All metal or with adjacent metals

Having magnetic properties, or preformed fiber orientation...

428621, 428630, 428651, 428667, B32B 1501

Patent

active

050494511

ABSTRACT:
A high-coercivity thin-film magnetic recording medium, and method of producing the medium, is disclosed. The medium has a sputtered chromium underlayer, preferably about 300-1,000 .ANG. thick, and a sputtered magnetic layer, preferably about 200-800 .ANG. thick, composed of an alloy containing between 70-80% cobalt, 10-20% chromium, 3-20% platinum, and 2-10% tantalum, formed on the chromium underlayer. The medium is characterized by high coercivity, resolution, amplitude and loop squareness value, and low bit shift.

REFERENCES:
patent: 5004652 (1991-04-01), Lal et al.

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