Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1995-07-18

1997-07-29

Kiliman, Leszek

Stock material or miscellaneous articles

Structurally defined web or sheet

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

428336, 428480, 428500, 428900, 428694BS, 428694BR, 428694ST, 428694SL, 428694SG, 428694BH, 428694TR, 427127, 427129, 20419212, 20419232, 20419234, 20419236, G11B 566, B05D 512, B32B 310

Patent

active

056520409

ABSTRACT:
A magnetic recording medium is provided and includes a support having a surface and a magnetic layer formed on the surface of the support and containing a magnetic powder and a binder resin. The surface of the support is treated by a treatment selected from the group consisting of a glow discharge treatment, a corona discharge treatment, a flaming treatment, a plasma treatment, a polishing treatment and a chemical treatment. The surface of the support has surface roughness values (Ra), measured at cut-off 0.8 mm by a method of needle contact, in the range of 0.004 to 0.015 .mu.m. A mean center line average value (Ra*) of surface roughness value measured by a scanning tunneling microscope in a very small area of 1 .mu.m.times.1 .mu.m on the support is more than 0.03 .mu.m and not more than 20% of a thickness of the magnetic layer.

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patent: 4997696 (1991-03-01), Kamada et al.
patent: 5266376 (1993-11-01), Okazoki
patent: 5458947 (1995-10-01), Yamada

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