Patent ID: 7736768
Filing Date: 2010-06-15
Classification: G11B

Abstract:
1. A magnetic disk for use in a load-unload method, comprising a magnetic layer and a protective layer sequentially formed on a disk-shaped substrate, said magnetic disk having a principal surface and a side surface portion both of which are coated with said protective layer, said side surface portion including a side wall surface and a chamfered surface lying between the side wall surface and said principal surface, wherein said side wall surface and said chamfered surface have said protective layer formed thereon, and wherein said magnetic disk further comprises: a region serving as a data zone for recording data; and a region serving as a load zone lying between the data zone and the side surface portion for loading a magnetic head on the magnetic disk; a protective layer formed on said side surface portion is a film thinner than a protective layer formed on said region serving as a data zone; a protective layer formed on said region serving as a load zone is a film thicker than a protective layer formed on said region serving as a data zone.