| 摘要 |
<p>In order to prevent a molded disc substrate (2) from generating a separation pattern, a molding die (1) includes a stationary die (6) and a movable die (7), and an outer circumference ring (16) for molding an outer circumference end of the disc substrate (2). The outer circumference ring (16) is so mounted as to be movable along forward and backward directions in parallel with a moving direction of the movable die (7) toward the stationary die (6), and has a retaining surface (39) for retaining the outer circumference of the molded disc substrate (2). <IMAGE></p> |
