Patent ID: 6757116
Filing Date: 2004-06-29
Classification: B82Y,G11B,Y10S

Abstract:
A method of manufacturing a patterned data/information storage and retrieval medium in the form of an annular disk having an outer diameter, a central opening defining an inner diameter, and opposed first and second major surfaces, said method comprising inserting a smaller diameter cylindrical shaft of a stamping/imprinting tool in said central opening of said disk and biasing said inner diameter of said disk into contact with said cylindrical shaft at a pre-selected location along said inner diameter of said disk during stamping/imprinting of a pre-selected pattern in at least one of said First and second major surfaces of said disk, said biasing creating a space between said inner diameter of said disk and said surface of said cylindrical shaft which has a maximum width at a location diametrically opposite said pre-selected location, wherein said disk is stationary relative to said stamping/imprinting tool during the stamping/imprinting of said pre-selected pattern.