Patent Number: 6,309,485

Title: Method and apparatus for manufacture of laminated optical disc

Abstract: A method and apparatus for the manufacture of laminated compact disc. When forming an adhesive layer between a first substrate and a second substrate, and laminating the first substrate and second substrate to produce a disc, temperature and other conditions are adjusted based on the adhesive layer thickness of the manufactured optical disc, thus the viscosity of adhesive is changed to match each process. Accordingly, high quality discs can be consistently manufactured, and the operating efficiency of the manufacturing apparatus can be improved. Moreover, an optical disc free of bubbles mixed in the adhesive layer of a laminated optical disc can be stably manufactured.

Inventors: Miyamoto; Hisaki (Suita, JP), Inoue; Kiyoshi (Osaka, JP), Itou; Hirokazu (Katano, JP), Kozono; Toshikazu (Osaka, JP)

Assignee: Matsushita Electric Industrial Co., Ltd.

International Classification: B29D 17/00 (20060101); B29C 65/00 (20060101); B29C 65/48 (20060101); G11B 7/26 (20060101); B29C 35/08 (20060101); B32B 031/04 (); B32B 031/12 (); B32B 031/14 (); G11B 007/26 ()

Expiration Date: 10/30/2018