Patent ID: 6096406
Filing Date: 2000-08-01
Classification: G11B,Y10S,Y10T

Abstract:
A magnetic recording medium which comprises a support having thereon in this order from the support side a substantially nonmagnetic lower layer and a magnetic layer comprising a ferromagnetic powder dispersed in a binder, wherein said magnetic layer has a coercive force of 1,800 Oe or more, central plane average surface roughness (Ra) of 5.0 nm or less, and the magnetic layer contains diamond fine particles having an average particle size of from 0.10 to 1.0 .mu.m in an amount of from 0.01 to 5% by weight based on the ferromagnetic powder, and wherein the number of diamond fine particles having the particle size of 200% or more of the average particle size accounts for 5% or less of the entire number of diamond fine particles, and the number of diamond fine particles having the particle size of 50% or less of the average particle size accounts for 20% or less of the entire number of diamond fine particles.