MASTER INFORMATION CARRIER, METHOD FOR PRODUCING THE CARRIER, METHOD AND APPARATUS FOR WRITING INFORMATION INTO MAGNETIC RECORD MEDIUM USING THE CARRIER

摘要

A MASTER INFORMATION CARRIER (61) COMPRISES A SUBSTRATE (51) WHOSE SURFACE HAS AN EMBOSSED PATTERN CORRESPONDING TO THE INFORMATION SIGNAL, AND AT LEAST A SURFACE OF THE PROTRUDING PORTION OF THE EMBOSSED PATTERN IS MADE OF A FERROMAGNETIC MATERIAL. A METHOD FOR WRITING AN INFORMATION SIGNAL INTO A SHEET OR DISK MAGNETIC RECORD MEDIUM (62) WITH A FERROMAGNETIC THIN FILM (42) OR COATING IS PERFORMED BY PUTTING THE SURFACE OF THE MAGNETIC RECORD MEDIUM (62) INTO CONTACT WITH THE MASTER INFORMATION CARRIER (61) SO AS TO WRITE A MAGNETIZED PATTERN CORRESPONDING TO THE EMBOSSED PATTERN OF THE MASTER INFORMATION CARRIER (61) INTO THE MAGNETIC RECORD MEDIUM (62) .