| 摘要 |
PURPOSE:To obtain an information disk of which distance between its surface and the surface of information signal is constant by such an arrangement wherein a metal mold having uneven information signals, a base board and a pressing plate are arranged in order and the pressing plate is specially arranged so that it keeps a specified space against the metal mold and radial ray setting resin is injected between the metal mold and the base board and it is hardened. CONSTITUTION:A metal mold 1 having uneven information signals is fixed to a metal mold main body 2 at its center with a center pin 3. A radial ray permeable base board 4 is positioned on the metal mold 1 so that it can be freely moved vertically, and a pressing plate 5 is arranged by being held by a thickness regulting protruded point 6, to be freely installed or removed therefrom, so that it is kept away from the surface of the metal mold 1 by such a distance 7 from the surface of a desired disk to the surface of information signal. Next, the base board 4 is caused to tightly contact with the pressing plate 5 by injecting radial ray setting resin between the metal mold 1 and the base board 4 from a resin passage 8 and harden a layer of molding resin 9 by illuminating radial rays. By this method, the distance between the surface of the disk and that of information signal is made constant. |
