Master information carrier and method of making magnetic recording meidum using master information carrier

本发明是一种利用在非磁性基体的表面上淀积了与在磁记录媒体上进行记录用的信息信号排列对应的形状图形的强磁性薄膜的排列而准备的主信息载体，强磁性薄膜是在信息信号的磁道长度方向上的矫顽力为40KA/m以下的软磁性薄膜或半硬磁性薄膜，而且在信息信号的磁道长度方向上的强磁性薄膜的剩磁比磁记录媒体的矫顽力大。由此，可得到在磁记录性能方面良好的主信息载体。 A master information carrier has a shape pattern corresponding to an information signal array to be recorded on a magnetic recording medium, and the shape pattern is provided by arraying a ferromagnetic thin film deposited on a nonmagnetic substrate surface. The ferromagnetic thin film is either a soft magnetic film or semihard magnetic film having not more than 40 kA/m coercive force in track length direction of the information signals, and residual magnetization of the ferromagnetic thin film in the track length direction of the information signals is greater than coercive force of the magnetic recording medium. As a result, a master information carrier with superior magnetic recording performance can be obtained.