Process and apparatus of producing optical disk and process of producing substrate
US6416609B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1999 |
| Grant date | Jul 9, 2002 |
| Priority date | — |
| Expiry date | Aug 5, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2017/005
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
There is provided a process of producing a laminate type optical disk comprising the steps of:(1) molding a pair of substrates of a transparent resin at least one of which substrates has irregularities on its one main surface;(2) forming a metal thin film on said one main surface having the irregularities, and then(3) laminating the pair of the substrates while the metal thin film is located inside and bonding the substrates by means of an adhesive which is supplied between the substrates,the process being characterized in that after the step (1), a waiting treatment is carried out in which the molded substrates are cooled to such a temperature that a difference between said temperature and a temperature of an atmosphere surrounding the substrates is not greater than 5° C. while keeping a moisture (or water) content of the substrates not larger than 0.1% by weight, and then the step (2) is carried out.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.