Patent ID: 6544672
Filing Date: 2003-04-08
Classification: C22C,G11B,Y10S

Abstract:
A magnetic recording medium comprising:a nonmagnetic substrate; an underlayer formed on said nonmagnetic substrate; a magnetic layer formed on said underlayer; and a protective layer formed on said magnetic layer; wherein said magnetic recording medium satisfies the following relationships: âˆ’0.5&lE;{Hc(1)âˆ’Hc(p)}/Hc(1)&lE;0.3 Hc(1)&gE;2 kOe 20 GÃ—&mgr;m&lE;Br(1)Ã—t&lE;100 GÃ—&mgr;m wherein Hc(1) indicates a coercivity of said magnetic layer measured in the longitudinal direction; Hc(p) indicates a coercivity of said magnetic layer measured in perpendicular direction; and said magnetic layer has a laminated structure comprising two or more magnetic layers.