MAGNETISCHER AUFZEICHNUNGSTRAEGER MIT VERTIKALER AUFZEICHNUNG.

摘要

A perpendicular magnetic recording medium comprises a base having a main surface and form, and a magnetic layer formed on the main surface, and having a recording surface, formed with a number of fine projections, and a susceptible axis substantially perpendicular to the recording surface. The projections are distributed so that the difference between a height level corresponding to an area ratio of 1.0%, obtained when the projections are cut by an imaginary plane parallel to the recording surface, and another height level corresponding to an area ratio of 99.0%, obtained in a like manner, ranges from 40 to 600 ANGSTROM . A protective film of a substantially uniform thickness is formed on the recording surface of the magnetic layer.