| 摘要 |
PURPOSE:To perfectly prevent deviation and deformation at high temps, by forming a very small protuberance on part of the inner circumference of a disc, sticking the disc temorarily with a sticky adhesive, then, applying ultrasonic vibraion to the part corresponding to the protuberance to thermally melt it. CONSTITUTION:A metallic vapor deposition film 3 and a deposition film protecting film are formed, and both 1a and 1c are stuck with a sticky adhesive agent, such as butyl acrylate adhesive or thermoplastic rubber type hot melt adhesive 4a to form a disc. At that time, the thickness of the adhesive is set so as not to exceed the height of the protuberance. Accordingly, the adhesive 4a can be applied only to the replica 1a. The disc thus stuck is joined by the method using ultrasonic vibration to form a structure joined in one body. |
