Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1995-08-02

1999-09-14

Resan, Stevan A.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428141, 428694BS, 428694BR, 428900, 360135, G11B 582

Patent

active

059520744

ABSTRACT:
A magnetic recording medium wherein thickness of the magnetic layer is less than the wavelength of projected light onto the surface of the magnetic recording medium having a multiplicity of magnetic-head tracking recesses formed thereon at predetermined intervals, and data tracks for recording thereon predetermined information provided between every two adjacent magnetic-head tracking recesses, each tracking recess and data track having a function to track a magnetic head in accordance with reflected light from the magnetic-head tracking recesses, the data tracks being provided at a track density greater than 1000 TPI and light transmittance of the magnetic recording medium is less than 5%.

REFERENCES:
patent: 4633451 (1986-12-01), Ahn et al.
patent: 4961123 (1990-10-01), Williams et al.
patent: 5256481 (1993-10-01), Miyake et al.
patent: 5355270 (1994-10-01), Umebayashi et al.
patent: 5430594 (1995-07-01), Umebayashi et al.

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