| 摘要 |
PROBLEM TO BE SOLVED: To enable recording with good signal quality by writing an information signal in the recording layers of mater media, comprising a magnetic material having a specified Curie temp. with a magnetic head in an atmosphere at the Curie temp. or higher. SOLUTION: Recording layers 2a, 3a comprising a material having a high coercive force and the low Curie temp. of 200 deg.C or lower, e.g. a Pt-based magnetic material are formed on at least one side of each nonmagnetic base film comprising a polyethylene terephthalate or the like to obtain the objective master media 2, 3. An information signal such as servo information is recorded in the recording layers with a magnetic head in an atmosphere at 200 deg.C or higher. An MIG head is used as the magnetic head, and contact recording is carried out at a spin stand.
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