Patent ID: 8999118
Filing Date: 2015-04-07
Classification: B82Y,C25D,C25F,G11B,Y10T

Abstract:
1. A method comprising: selectively removing cobalt from one or more of portions of a cobalt-containing magnetic film layer on a surface of a substrate using a first electrolyte solution, the substrate comprising a resist layer over the cobalt-containing magnetic film, the resist layer comprising one or more pattern features exposing one or more of the portions of the cobalt-containing magnetic film, wherein the removal of cobalt forms a groove in the cobalt-containing magnetic film layer; depositing a non-magnetic matrix in the groove using second electrolyte solution comprising a substantially similar electrolytic composition as the first electrolyte solution used for the selective removal of cobalt; controlling the rate of deposition of the non-magnetic matrix through application of an amount of current sufficient to adjust an electric potential of the second electrolyte solution; and controlling the rate of selective removal of cobalt through application of an amount of current sufficient to adjust an electric potential of the first electrolyte solution.