Patent ID: 8277874

Claim:
A manufacturing method of a magnetic recording medium, the magnetic recording medium having a structure where plural magnetic recording areas and isolation areas in a magnetic recording layer are formed on a non-magnetic substrate, the isolation areas being configured to magnetically isolate the magnetic recording areas, the manufacturing method comprising: forming a magnetic layer over the non-magnetic substrate, the magnetic layer being made of a hard magnetic material having a magnetic coercive force disabling magnetic recording; and performing ion implantation partially at positions corresponding to the plural magnetic recording areas of the magnetic layer so that the magnetic recording areas are formed by reducing the magnetic coercive force in the positions of the ion implantation to a magnetic-recordable magnetic coercive force, and allowing the isolation areas to maintain the magnetic coercive force disabling magnetic recording, wherein, in the performing the ion implantation partially at the positions corresponding to the plural magnetic recording areas of the magnetic layer, after a first ion implantation is performed, a second ion implantation is performed by using an ion implantation energy different from an enemy used for the first ion implantation.