MASTER DISC AND METHOD OF MANUFACTURING MAGNETIC DISC USING THE SAME

摘要

A master disc enabling preformat recording by magnetic transfer uniformly over the entire surface of a magnetic disc. The master disc comprises radial land parts (5) on each of which stripes of a ferromagnetic thin film (4) are arranged and indented parts (6) different in height from the land parts (5). When the master disc is laid on a magnetic disc (7), the land parts (5) close touch the surface of the magnetic disc (7) while the indented parts (6) do not touch the surface of the magnetic disc (7). The spaces surrounded by the surface of the magnetic disc (7) and the indented parts (6) are open to the atmosphere at the outer peripheral edge of the magnetic disc (7).