Patent ID: 6790534
Filing Date: 2004-09-14
Classification: G11B,Y10T

Abstract:
A magnetic transfer master medium comprising:a non-magnetic substrate having a surface containing protrusion portions depression portions; and a magnetic layer formed on said protrusion portions for transferring data to the magnetic recording layer of a perpendicular magnetic recording medium, and a magnetic layer formed in the depression portions, wherein the magnetic layer formed on the protrusion portions and the magnetic layer formed in said depression portions are magnetically linked so as to enable substantially all magnetic flux generated by applying a transfer magnetic field perpendicular to a surface of said magnetic transfer master medium to pass through said magnetic layer formed on said protrusion portions and said magnetic layer formed on said depression portions in a same direction as that of said transfer magnetic field, and the ratio of the thickness of said magnetic layer formed on said protrusion portions to a track direction width of the magnetic layer of formed on the protrusion portions is greater than or equal to 0.8 and less than or equal to 3.