| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a configuration laminated with two or more layers of information recording layers having information rugged surfaces, formed with a light transmission layer 3 by a transparent thin film body on a photoirradiation side and formed with a rugged information layer on the light transmission layer itself and to manufacture the light transmission layer, i.e. the transparent thin film body having high optical property by injection molding. <P>SOLUTION: The information recording medium disk 1 is constituted by laminating a disk substrate 2 formed with the rugged information surface constituting the information recording layer 11 on at least one major face and laminating the light transmission layer 3 consisting of the thin film body with a clamping part formed with the rugged information surface through at least a transparent intermediate layer 5 on the major face formed with the information recording layer 11 of the disk substrate 2 and forming a central hole 4. A thick-walled projecting part 3C is formed in the clamping part 31 in the central part of the light transmission layer 3 constituted by the thin film body with the clamping part, by which the injection molding of the light transmission layer 3 having mechanical strength, ease of handling and excellent optical characteristics at a good yield is made possible. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
