Magnetic recording medium

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.

Dependencies are inferred from the claim text.