| 摘要 |
PURPOSE:To enable satisfactory forming of continuous spiral projected or recessed parts on an original plate by forming successively the 1st layer having energy absorptivity and gas liberation property and the 2nd layer consisting of an org. resin on a base plate thereby forming an information recording member to be formed with the projecting parts by irradiation of a laser beam. CONSTITUTION:The 1st layer 12 having energy absorptivity and gas liberating property is formed on a glass base plate 11, and the 2nd layer 13 of an org. resin is formed therein. The layer 12 contains preferably a low-melting metal, such as Te, Bi or the like, having <=600 deg.C melting point and any among C, N, H and O and can be formed by sputtering a target of a low-melting metal in vacuum by plasma of gas such as CH3, NH3, CO2 or H2. The layer 13 is preferably an org. resin which allows good transmission of a laser beam and has a low thermal deformation temp. and elongation, for which polytetrafluoroethylene, polycarbonate, etc. are used. |
