Title :
High quality optical disc stampers with round edge grooves
Author :
Morita, S. ; Nishiyama, M. ; Konishi, H. ; Hayashi, M. ; Akiyama, T. ; Niwa, T.
Author_Institution :
Bus. Dev. Center, Nikon Corp., Yokohama, Japan
Abstract :
We describe a deep groove having round edges in the optical disc substrate as one of solutions for difficulty in injection molding. The round edge deeper grooves were actually made and tested. Stampers with the round edge grooves can be easily made by modified directly engraved glass mastering. Replication separability from the stamper is markedly improved. No cloud problem, shorter cycle time at replication process and longer lifetime of stampers were confirmed.
Keywords :
moulding; optical disc storage; optical fabrication; 4.7 Gbyte; cycle time; deep groove; engraved glass mastering; high quality optical disc stampers; injection molding; longer stamper lifetime; optical disc substrate; replication process; replication separability; round edge deeper grooves; round edge grooves; round edges; CD recording; Clouds; Costs; Geometrical optics; Glass; Injection molding; Optical recording; Resists; Shape; Substrates;
Conference_Titel :
Optical Data Storage, 2000. Conference Digest
Conference_Location :
Whisler, BC, Canada
Print_ISBN :
0-7803-5950-X
DOI :
10.1109/ODS.2000.847964
