Patent ID: 6667118
Filing Date: 2003-12-23
Classification: G11B,Y10S,Y10T

Abstract:
A method of manufacturing a magnetic recording medium having reduced Barkhausen noise, comprising the sequential steps of:(a) providing a non-magnetic substrate having a surface; (b) providing said surface of said substrate with a unidirectional texture pattern; (c) forming an underlayer of a soft magnetic material over said unidirectional texture pattern, said layer of soft magnetic material having positive magnetostriction and uniaxial magnetic anisotropy and including a plurality of magnetic domains; and (d) forming a magnetic recording layer of a hard magnetic material over said underlayer; wherein said uniaxial magnetic anisotropy of said underlayer of soft magnetic material is sufficiently large as to orient said magnetic domains thereof along the axis of said uniaxial magnetic anisotropy and thereby restrict domain wall formation and/or movement, whereby generation of Barkhausen noise in said magnetic recording layer is suppressed.