Patent ID: 6534168
Filing Date: 2003-03-18
Classification: G11B,Y10S,Y10T

Abstract:
A magnetic recording medium which comprises a nonmagnetic lower layer comprising a nonmagnetic powder and a binder and a magnetic layer comprising a ferromagnetic powder and a binder provided in this order on a flexible nonmagnetic support,wherein said nonmagnetic lower layer comprises flat acicular &agr;-iron oxide powder and granular nonmagnetic particles and said flat acicular &agr;-iron-oxide powder has a major axis length ranging from 0.05 to 0.5 &mgr;m and a ratio of the major width m to the minor width k of the minor axis cross-section when sectioned at an angle perpendicular to the major axis (m/k) being higher than 1, and said granular nonmagnetic particles have a mean particle diameter equal to or less than 0.04 &mgr;m.