Patent ID: 6686022
Filing Date: 2004-02-03
Classification: G11B,Y10T

Abstract:
A magnetic recording medium comprising:a lower layer comprising a nonmagnetic powder, and a binder and an upper magnetic layer having a magnetic layer surface and comprising a ferromagnetic powder, a binder and at least one abrasives material provided on a nonmagnetic support in this order, wherein said abrasive material has a plurality of abrasive particles, the number of abrasive particles X present on said magnetic layer surface, counted using a scanning electron microscope at 20,000 times magnification, satisfies the relation 0.2&lE;X&lE;1.2 (particles/&mgr;m2), and when the number of pairs of abrasive particles satisfying the relation L&lE;2K (where K denotes the mean particle diameter of the abrasive, measuring using the scanning electron microscope at 20,000 times magnification, and L denotes the distance from the center of gravity of one of the abrasive particles to the center of gravity of to other abrasive particle, measured using the scanning electron microscope at 20,000 times magnification) is denoted as Y (particles/&mgr;m2), Y/X is equal to or less than 2.