Magnetic disk medium

Details Magnetic disk medium Magnetic disk medium

1986-09-24

1988-02-16

Thibodeau, Paul J.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

360135, 428 65, 428163, 4283084, 428694, 428900, G11B 5704, G11B 564

Patent

active

047254700

ABSTRACT:
A magnetic disk medium having a magnetic layer formed on its substrate, is characterized in that in a portion of the substrate where a magnetic head runs is formed a concave groove in which a cushion material is provided, whereby the contact pressure appearing between it and the magnetic head is lowered.
Preferably, the cushion material is either plastic foam selected from the group consisting of polyurethane foam, polystyrene foam, cellular polyethylene, cellular rubber, cellular polyvinyl chloride, and foamed polyester, or elastic silicone resin.

REFERENCES:
patent: 3130110 (1964-04-01), Schmidt
patent: 4107752 (1978-04-01), Johnson, Jr.

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