Patent ID: 6606208
Filing Date: 2003-08-12
Classification: G11B

Abstract:
A method of manufacturing a magnetic record medium with a master information recorded thereon, comprising:contacting a surface of a master information carrier with a surface of a magnetic record medium having a ferromagnetic film or a ferromagnetic coating, wherein the master information carrier comprises a substrate and an embossed pattern of a ferromagnetic material provided on the surface of the substrate, the embossed pattern having an upper surface and a bottom, the distance between the upper surface of the embossed pattern and the bottom of the embossed pattern being more than 0.05 microns, and the pattern corresponding to an arrangement of the master information signal, and wherein the magnetic record medium has a coercive force more than 150 kA/m; sucking air between the master information carrier and the magnetic record medium; and applying a direct exciting field whose intensity is as large as, or below the coercive force of the magnetic record medium to the master information carrier so that the ferromagnetic material of the master information carrier reaches substantial magnetic saturation, thereby magnetically transferring the master information signal into the magnetic record medium as a magnetization pattern from the ferromagnetic material of the master information carrier.