Patent ID: 8333899
Filing Date: 2012-12-18
Classification: B82Y,G11B,Y10T

Abstract:
1. A method of manufacturing a magnetic recording medium, comprising: forming, on a magnetic recording layer, a first hard mask made of a material selected from the group consisting of Mg, Al, Sc, Ti, V, Mn, Y, Zr, Nb, La, Ce, Nd, Sm, Eu, Gd, Hf, Zn, Sn, Pb, Ga, In and alloys thereof, a second hard mask made of a material selected from the group consisting of Cu, Ge, Ag, Ir, Pt, Au, Bi and alloys thereof, a third hard mask comprising carbon as a main component, and a resist; imprinting the resist with a stamper that transfers a pattern of protrusions and recesses to the resist; removing a residue in the recesses of the patterned resist; etching the third hard mask by use of the patterned resist as a mask, using O etching the second hard mask by use of the third hard mask as a mask, using a gas selected from the group consisting of SF etching the first hard mask by use of the second hard mask as a mask, using a gas selected from the group consisting of SF patterning the magnetic recording layer with ion beam irradiation; and removing the first hard mask with a remover liquid having higher reactivity to the metal material of the first hard mask than to a constituent element of the magnetic recording layer.