抄録
The manufacturing processes of CD-ROM, especially injection molding, sputtering reflection layer, coating protection layer, and disc visual inspection, are described, and examples of CD-ROM manufacturing system are introduced. The difficult point of shortening cycle time of CD-ROM injection molding is to keep birefringence and pits replication in the specification, It is explained how to set molding conditions in order to get good characteristics of discs when the molding cycle time is shortened. Moreover, the difficulties and countermeasures about molding high density disc are described.
