Patent ID: 6482506
Filing Date: 2002-11-19
Classification: G11B,Y10S,Y10T

Abstract:
A magnetic recording medium comprising a flexible nonmagnetic support having thereon, in order, a nonmagnetic layer containing a nonmagnetic powder and a binder and at least two magnetic layers including an uppermost magnetic layer and a lowermost magnetic layer, each containing a ferromagnetic powder and a binder, wherein said at least two magnetic layers have total thickness of from 0.02 &mgr;m to 0.5 &mgr;m and an average particle volume V(u) and a saturation magnetization &sgr;s(u) of a ferromagnetic powder in said uppermost magnetic layer are, respectively, higher than an average particle volume V(L) and a saturation magnetization &sgr;s(L) of a ferromagnetic powder in said lowermost magnetic layer, and wherein V(u) is in the range of from 5,000 to 50,000 nm3 and V(L) is in the range of from 1,000 to 20,000 nm3.