Patent ID: 6255006
Filing Date: 2001-07-03
Classification: G11B,Y10S,Y10T

Abstract:
A magnetic recording medium comprising a non-magnetic substrate having thereon a non-magnetic undercoat and a magnetic film, said magnetic film comprising a material containing Co as a main component, said non-magnetic undercoat comprising at least two layers including a first undercoat film and a second undercoat film provided on said first undercoat film, said first undercoat film comprising a material containing Cr as a main component, and said second undercoat film comprising a material selected from the group consisting of a Cr/Nb-base alloy, a Cr/W-base alloy, and a Cr/V-base alloy as a main component, provided that:if the second undercoat film comprises Cr/Nb-base alloy as a main component, the Nb content of the second undercoat film is from 5 to 20 at %;if the second undercoat film comprises Cr/W-base alloy as a main component, the W content of the second undercoat film is from 5 to 60 at %; andif the second undercoat film comprises Cr/V-base alloy as a main component, the V content of the second undercoat film is from 2 to 30 at %.