MANUFACTURING METHOD OF MASTER INFORMATION CARRIER AND MAGNETIC RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To improve the durability to frequent transferring for a master information carrier that closely contacts the surface of its ferromagnetic material stuck in the form of signal patterns with a magnetic recording medium to transfer the preformat information such as servo signals. SOLUTION: The average centerline roughness of the non-magnetic base plate 2 composing the master information carrier is made larger than the other parts at the part 5a where it contacts a ferromagnetic material 4.