Magnetic recording medium and recording/reproducing method there

Details Magnetic recording medium and recording/reproducing method there Magnetic recording medium and recording/reproducing method there

1987-12-02

1989-05-09

Thibodeau, Paul J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

427131, 427132, 428141, 428323, 428694, 428900, G11B 564

Patent

active

048288993

ABSTRACT:
A magnetic recording medium comprising a ferromagnetic metal thin film layer primarily based on cobalt and formed on the surface of a flexible substrate, and an organic topcoat layer containing a radiation curable compound having a molecular weight of less than 2,000, an anti-oxidant, and a lubricant on the surface of the metal thin film layer is provided with protrusions on its surface at an average density of at least 10.sup.5 /a.sup.2 per square millimeter of the surface, the protrusions having a height of 30 to 300 .ANG. where a is the distance of a gap in a magnetic head across which the medium is passed in recording/reproducing operation.

REFERENCES:
patent: 4452863 (1984-06-01), Takizawa et al.
patent: 4486500 (1984-12-01), Naruo et al.
patent: 4511635 (1985-04-01), Nagao et al.
patent: 4565734 (1986-01-01), Arai et al.
patent: 4578729 (1986-03-01), Suzuki et al.
patent: 4645703 (1987-02-01), Suzuki et al.

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