Patent ID: 8308965
Filing Date: 2012-11-13
Classification: C25D,G11B

Abstract:
1. A stamper comprising: a projections pattern configured to form, on a magnetic recording layer, one of either a recording track or a recording bit, and positioning information of a read/write head; a stamper main body comprising the projections pattern on one major surface; and a conductive material concentration gradient layer along the one major surface, wherein the conductive material concentration gradient layer comprises a buffering material and a conductive material selected from the group consisting of Ni—C, Co—C, and Cu—Cl, wherein the content of the buffering material is lower than 10 at %, wherein the conductive material concentration gradient layer further comprises the projections pattern, wherein the conductive material concentration gradient layer is formed by using a chemical vapor growth method, wherein the conductive material concentration gradient layer has a thickness of 0.5 to 10 nm, and wherein a concentration of the buffering material with respect to the conductive material decreases from an outer surface toward the stamper main body.