| 摘要 |
PURPOSE:To obtain an optical disc having high faithfulness at the time of transfer and completely prevented from the damage of a substrate at the time of molding by constituting the substrate of the optical disc with a glass substrate having 40kg/mm.<2> or more bending strength. CONSTITUTION:The optical disc is obtained by using the glass substrate as a supporting body, a forming liquid molding resin to curable by the action of irradiated rays and transferring a rough pattern corresponding to recording information by a reproducing metal mold. Consequently, the glass substrate having 40kg/mm.<2> or more bending force is used as the supporting body. Since heat resistance is increased, the optical disc superior in the faithfulness of transfer of the glass substrate having a fine and routh pattern and completely prevented from the damage of the substrate at the time of molding can be obtained. |
