摘要 |
<p>PROBLEM TO BE SOLVED: To provide an information recording medium capable of preventing forgery, eliminating illegal reuse of an used medium, and recording with high density. SOLUTION: The information recording part 3 formed on a substrate 2 is provided with a magnetic layer for which a soft magnetic layer is laminated on a hard magnetic layer; the fixed magnetic information that consists of plural minute recessed and projected parts arrayed along the scanning direction of the magnetic head is recorded on the soft magnetic layer, with the same variable magnetic information as the fixed one synchronized to and recorded on the constituent hard magnetic layer, and thereby providing the information recording medium 1.</p> |