Abstract

Because of the large memory capacity, optical disks are required to be more reliabl compared with other recording media. Especially, 12” write-once type optical disks are mainly used for archival applications. Therefore, it is important that they can preserve recorded data for a very long time. To keep long term reliability for recorded data, it is essential that initial error rate is low enough and that the error rate dose not increase for a long time. In order to meet the above demand, a series of automated clean processes have been developed for production of air sandwiched type ternary alloy (Te–Se–Pb) recording media ^{1), 2)} in which glass substrates covered with 2P resin are used.

© 1989 Optical Society of America