| 摘要 |
PROBLEM TO BE SOLVED: To prevent the deterioration of a substrate, to enable the sufficient change from a flat planar shape to a rugged shape and to provide a disk meeting a system by successively forming a flexible high-polymer resin layer and a shape memory alloy on a transparent substrate and forming groove line parts for information recording on a shape memory alloy reflection layer to a spiral shape with respect to a plane direction. SOLUTION: The flexible high-polymer resin layer 2 is formed by a spin coating method, etc., on the transparent plate 1 consisting of a polycarbonate resin, acrylic resin or the like. The shape memory alloy Ti-Ni or Cu-Zn-Al is laminated to a thickness of 1 to 2 microns on this flexible high-polymer resin layer 2 to form the shape memory metal reflection layer 3. Further, the groove line parts 3a of a V shape or rectangular shape in the sectional shape are pressed to the shape memory metal reflection layer 3 by using a stamper S transferred with projecting parts S1 which are the V shape or rectangular shape in the sectional shape and are spiral with respect to the plane direction, by which the groove line parts 3a of the V shape or rectangular shape of 2 to 4% in distortion deformation are formed. |
