Patent ID: 7960044
Filing Date: 2011-06-14
Classification: B82Y,C23C,G11B

Abstract:
1. A patterned-media perpendicular magnetic recording disk comprising: a substrate having a generally planar surface; a plurality of spaced-apart data pillars extending generally perpendicularly from said substrate surface and arranged in generally concentric circular tracks, the data pillars defining data trenches at said substrate surface between the data pillars; a plurality of spaced-apart nondata servo pillars extending generally perpendicularly from said substrate surface and arranged in a plurality of angularly-spaced nondata servo sectors extending generally radially across the tracks, the servo pillars defining servo trenches at said substrate surface between the servo pillars; magnetizable material on the data pillars and servo pillars and in the servo trenches and having perpendicular magnetic anisotropy, the magnetizable material selected from the group consisting of (a) a Co/Ni multilayer, (b) a multilayer of alternating films of a first film selected from Co, Fe, CoFe, CoNi and FeNi, and a second film selected from Pt and Pd, (c) a binary alloy selected from CoPt, CoPd, FePt, FePd, CoPt the data trenches contain discontinuous magnetic material and the servo pillars, data pillars and data trenches have a magnetization in the same perpendicular direction and the servo trenches have a magnetization in the opposite perpendicular direction; the servo pillars have a height (h) above the substrate surface and are spaced apart on the substrate surface by a distance (t the data pillars have a height (h) above the substrate surface and are spaced apart on the substrate surface by a distance (t