Patent ID: 6497948
Filing Date: 2002-12-24
Classification: G11B,Y10S,Y10T

Abstract:
A magnetic recording medium comprising a lower layer containing a nonmagnetic powder and a binder and a magnetic layer containing a ferromagnetic powder and a binder provided on a nonmagnetic flexible substrate in this order whereinsaid magnetic layer has an average thickness d in a range of from 0.01 to 0.1 &mgr;m, said ferromagnetic powder contained in said magnetic layer is an acicular ferromagnetic alloy powder having an average major axis length equal to or less than 0.1 &mgr;m and a saturation magnetization equal to or less than 120 A.m2/kg, said nonmagnetic powder contained in said lower layer is an acicular inorganic powder having an average major axis length equal to or less than 0.15 &mgr;m, and said ferromagnetic powder has an aspect ratio equal to or smaller than the aspect ratio of said acicular inorganic powder.