Patent ID: 6586044
Filing Date: 2003-07-01
Classification: G11B

Abstract:
A method for fabricating a magnetic hard disk rotatable around a center of the disk having a plurality of magnetic tracks concentrically disposed around the center of the disk and spaced to each other, comprising the steps of:forming a first non-magnetic film on an upper surface of a substrate made of non-magnetic or antiferro-magnetic material; forming a magnetic film concentrically patterned around the center of said substrate on an upper surface of said first non-magnetic film to form the magnetic tracks; forming a second non-magnetic film on said magnetic film; forming a third non-magnetic film continuously on said second non-magnetic film and a space between each pair of said magnetic tracks adjacent to each other such that an upper surface of said third non-magnetic film exceeds a plane of the upper surface of said second non-magnetic film; removing an upper part of said third non-magnetic film such that both upper surfaces of said second and third non-magnetic films are in a plane parallel to a plane of rotation of the magnetic hard disk; forming a fourth non-magnetic film continuously on both said second and third non-magnetic films; and roughening an upper surface of said fourth non-magnetic film such that the upper surface has surface roughness greater than 0.5 nm maintaining a maximum surface roughness smaller than 3 nm.