| 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, an organic topcoat layer containing an anti-oxidant and a lubricant on the surface of the metal thin film layer, and a backcoat layer containing an inorganic pigment, an organic binder, and a lubricant on the other surface of the substrate is provided with protrusions on its surface at an average density of at least 105/a2 per square millimeter of the surface, the protrusions having a height of 30 to 300 ANGSTROM , where a is the distance of a gap in a magnetic head with which the medium is used in recording/reproducing operation. |