Patent ID: 8158215

Claim:
A method of manufacturing magnetic recording media in which a magnetic layer is provided on at least one surface of a nonmagnetic substrate and a magnetically separated magnetic pattern is formed in the magnetic layer, comprising: implanting a plurality of atoms in the form of ions, each having a different energy, in said magnetic layer with uniform distribution in the magnetic layer thickness direction, said atoms being one or more of the atoms selected from the group consisting of: B, P, Si, F, H, C, In, Bi, Kr, Ar, Xe, W, As, Ge, Mo, Sn, partially amorphizing said magnetic layer to render portions of said magnetic layer nonmagnetic, so that nonmagnetic portions are formed which magnetically separate said magnetic pattern, thereby preventing recrystallization, caused by heat, of the amorphized portion of said magnetic layer wherein said magnetic layer comprises Co, and the Co (002) or Co (110) X-ray diffraction peak intensity of said nonmagnetic portion is ½ or less of the peak intensity of the magnetic layer before implantation of atoms.