| 摘要 |
PURPOSE:To prevent deformation of an optical disk substrate and improve the produc tivity and further obtain the optical disk substrate at low cost by providing a compres sion speed adjusting means, which is arranged movably up and down on the upper surface of a stamper disc, of photo-setting resin extruded on the upper surface of the stamper disc, and a transparent compression board equipped with a temperature adjusting means. CONSTITUTION:The stamper disc 2 is mounted on a stamper disc mounting base 1 in the form of being upwardly faced with its recording surface. A center rod 5 comes up and a resin discharge port 6 is opened. Photo-setting resin is radially extrude on the stamper disc 2 through the resin discharge port 6. The transparent compression board 8 comes down and a cavity is formed by a spacer ring 8d provided on a lower glass plate 8a and the stamper disc 2, and the resin extracted on the stamper disc 2 is pressedly spread over by the plate surface of the lower glass plate 8a and fills up the inside of the cavity. A high pressure mercury-arc lamp is emitted and the ultraviolet light permeates through the upper and lower glass plates 8a, 8b of the transparent compression board 8, so that the resin is cured by photo-setting. When the glass plates 8a, 8b are heated by the ultraviolet light, thermal medium flows into the passage 8c of the thermal medium so as to control the temperature rising of the glass surface. |
