Patent ID: 8419952

Claim:
A method of manufacturing a patterned medium, comprising: forming a diamond-like carbon film above a magnetic recording layer before forming an implantation depth-adjusting layer; forming the implantation depth-adjusting layer above the magnetic recording layer, wherein the magnetic recording layer comprises a material that is deactivated when implanted with a chemical species, and wherein the implantation depth-adjusting layer comprises at least one material that is etched when irradiated with an ion beam of the chemical species and selected from the group consisting of Ag, Au, Cu, Pd, Pt, Ru, CoPt, CoCrPt, CoCrPt—SiO 2 , Al, Cr, Hf, Mo, Nb, Ta, Ti, V, W and Zr; and irradiating the implantation depth-adjusting layer with the ion beam to implant the chemical species into a part of the magnetic recording layer through the implantation depth-adjusting layer while etching the implantation depth-adjusting layer to decrease a thickness of the implantation depth-adjusting layer.