Patent ID: 6980380

Claim:
A master information carrier comprising: a disk-shaped base; a high-level region; a low-level region differing from the high-level region in level; and a ferromagnetic thin film pattern formed in a surface of the high-level region so as to correspond to an information signal, the high-level region, the low-level region, and the ferromagnetic thin film pattern being provided on the disk-shaped base, wherein the master information carrier is to be superimposed on a magnetic disk with the ferromagnetic thin film pattern in close contact with a surface of the magnetic disk, and application of an external magnetic field allows the information signal to be transferred and recorded onto the magnetic disk, and wherein when the master information carrier is superimposed on the magnetic disk, an inner edge of the high-level region is located outside a hole edge of the magnetic disk in a radial direction, and a radial distance between the inner edge and the hole edge is not less than 0.2 mm and at least a portion of the high-level region comes into contact with the vicinity of a hole edge of the magnetic disk.