Patent ID: 7846567
Filing Date: 2010-12-07
Classification: G11B

Abstract:
1. A magnetic disk comprising: a substrate having annular convex and concave portions; a magnetic recording section formed on at least the annular convex portion on the substrate; a protrusion formed of a non-magnetic material, which is formed in the annular concave portion of the substrate and which projects from the annular concave portion so as to have a surface higher than a surface of the magnetic recording section formed on at least the annular convex portion of the substrate; and an overcoat which covers the magnetic recording section and the protrusion and which is formed in accordance with a shape of the magnetic recording section and the protrusion; wherein a surface portion of the overcoat which covers and is formed over the protrusion projects above and is higher than another surface portion of the overcoat which covers and is formed over the magnetic recording section formed on at least the annular convex portion of the substrate.