Thin film-type magnetic disk

摘要

A thin film-type magnetic disk includes a non-magnetic substrate having fine particle-like projections provided over at least the entirety of the recording areas of the magnetic disk. The fine particle-like projections are formed either on bulged portions of the substrate or are provided in the form of bands. The bulged portions and the bands extend substantially parallel to a direction of movement of a magnetic head relative to the magnetic disk. A magnetic layer, a protective layer and a lubricant layer are sequentially formed on the substrate.