Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1987-02-19

1989-01-31

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

Record medium

Disk

360131, G11B 582, G11B 574

Patent

active

048020508

ABSTRACT:
A magnetic recording medium is disclosed wherein the data tracks are formed of magnetic layers and the non-data tracks are formed of non-magnetic layers. The data tracks and non-data tracks are alternately disposed and the non-data tracks do not effect recording/reproducing/erasing of the data tracks. Another medium is disclosed wherein the magnetic and non-magnetic layers are alternately disposed in the direction of recording/reproducing and the magnetizing transition width is shortened so that the bit length may be shortened. A reproducing apparatus is also disclosed which includes a discriminator for discriminating the magnetizing direction of the magnetic layer on the data tracks on the basis of a detection signal fed from the reproducing head.

REFERENCES:
patent: 2144844 (1939-06-01), Hickman
patent: 3214178 (1965-10-01), Warnke
patent: 3258750 (1966-06-01), Shew
patent: 3452358 (1969-06-01), Zehner
patent: 3453598 (1969-07-01), Schweizer
patent: 3460118 (1969-08-01), Woolfolk
patent: 3593331 (1971-07-01), Connell et al.
patent: 4016603 (1977-04-01), Ottesen

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