Magnetic recording medium

Stock material or miscellaneous articles – Structurally defined web or sheet – Including variation in thickness

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Details

360134, 360135, 360136, 427128, 427130, 428328, 428329, 428330, 428409, 428694, 428900, G11B 570

Patent

active

043372880

ABSTRACT:
A magnetic recording medium comprising a coated magnetic recording layer having video and chroma S/N ratios appropriately balanced with tape transporting characteristics is attained by controlling the magnetic layer to have a surface roughness such that the maximum value of the arithmetical average roughness (Ra) is about 80 A or greater in the surface roughness pitch region greater than about 300 .mu.m while in the surface roughness pitch region of about 5 .mu.m to about 100 .mu.m the maximum value of the arithmetical average roughness (Ra) is about 40 A or less.

REFERENCES:
patent: 3817785 (1974-06-01), Abitoul
patent: 4015042 (1977-03-01), Chassaigne
patent: 4071654 (1978-01-01), Ogama et al.
patent: 4100326 (1978-07-01), Somezawa et al.
patent: 4272602 (1981-06-01), Stemme et al.

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