Patent ID: 6723415
Filing Date: 2004-04-20
Classification: G11B,Y10S,Y10T

Abstract:
A magnetic recording medium comprising:a non-magnetic support; at least one primer layer on one surface of said non-magnetic support; a magnetic layer on said primer layer; and a back coat layer on the other surface of said non-magnetic support, wherein said non-magnetic support has a thickness of 2 to 5 &mgr;m, the surface roughness (Ra) of said non-magnetic support on the surface carrying said primer layer and said magnetic layer is from 2.5 nm to 9 nm, the thickness of said primer layer is 1.5 &mgr;m or less, and said primer layer contains 2 to 30% by weight, based on the weight of all inorganic powder in said primer layer, of alumina powder having a particle size of 0.01 &mgr;m to 0.1 &mgr;m.