Method of manufacturing master disk for magnetic transfer, master disk for magnetic transfer, and magnetic recording medium

Abstract

The present invention provides a method of manufacturing a master disk for magnetic transfer, comprising the steps of: forming a metal plate having a predetermined thickness on an original plate having a concavo-convex pattern corresponding to information to be transferred; stamping the metal plate separated from the original plate to form a center opening and a circular rim, thereby providing a master substrate; and depositing a magnetic layer on the concavo-convex pattern of the master substrate, wherein a region at the upper edge of the center opening where a roll off occurs when the center opening of the master substrate is formed by stamping is defined as a center-opening roll-off region, a predetermined range of center-opening buffer region is provided outside of the center-opening roll-off region, and the concavo-convex pattern is formed outside of the center-opening buffer region.

Dependencies are inferred from the claim text.