Patent ID: 6264848
Filing Date: 2001-07-24
Classification: G11B

Abstract:
A method of providing servo and/or track following information and/or adjacent track separation on a substrate, utilizing regions of varying physical parameters and/or grooves and/or similar defined depressions, comprising the steps of:defining said depressions in a substrate, depositing an etch stop layer over the surface of said substrate including a surface of said depressions;including the further step of depositing a sacrificial layer over said etch stop layer;depositing a filler into said depression and over said etch stop layer to a depth sufficient that the bottom of said depressions is filled to a height substantially equal to or above a top surface of said etch stop layer;and differentially removing said filler so that said filler material over said etch stop layer is removed with little or no removal of said etch stop layer to leave a substantially planar surface so that the outermost surface is substantially level.