High density magnetic information storage medium

Details High density magnetic information storage medium High density magnetic information storage medium

1994-06-30

1996-12-24

Kiliman, Leszek

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428218, 428692, 428694R, 428694T, 428694TR, 428336, 428900, 427128, 427130, 283 82, G11B 566, B32B 300

Patent

active

055872239

ABSTRACT:
Magnetic recording media comprising an ordered, ultra-high density array of 500 .ANG. diameter circular magnetic thin film islands on a substrate. The magnetic material supports magnetization perpendicular to the film plan, and each circular island comprises a single magnetic domain and a single information storage bit. An areal bit density of 10.sup.11 bits/in.sup.2 can be achieved by such an array. The magnetic array is generated using a single level mask comprised of a self-ordering polymer array, either an array of polymer spheres or a regular array of polymeric blocks in a phase-separating polymer film.

REFERENCES:
patent: 4274935 (1981-06-01), Schmelzer
patent: 4670353 (1987-06-01), Sakurai
patent: 4746580 (1988-05-01), Bishop et al.
patent: 4935278 (1990-06-01), Krounbi

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