METHOD FOR MANUFACTURING MASTER INFORMATION CARRIER

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing a master information carrier excellent in quality stability for preformat recording in a hard disk or the like. SOLUTION: A nonmagnetic substrate 2 is cleaned, on which a pattern corresponding to a digital information signal is formed with a resist 3. A recess pattern corresponding to the digital information signal is formed by reactive etching on the surface of the nonmagnetic substrate, a ferromagnetic thin film 1 is formed in the recess, and the pattern and film except for the ferromagnetic thin film embedded in the recess are removed.