Patent ID: 7615292

Claim:
A magnetic recording medium comprising: a substrate; and a recording layer formed in a predetermined concavo-convex pattern over the substrate, wherein a surface of the magnetic recording medium has a concavo-convex shape that conforms with the concavo-convex pattern of the recording layer in a convex and concave positional relation, convex portions of the concavo-convex shape of the surface being formed over convex portions of the concavo-convex pattern of the recording layer, and R representing a concavo-convex ratio obtained by dividing an area of the convex portions of the surface by an area of concave portions of the surface, and S representing a difference in height between a concavity and a convexity of the surface satisfy the following relationship: S (nm)≦3.6 ×R , and 0.5 ≦R ≦2.0.