Title :
Study on 40 Gbit/inch2 density molding using heat insulated mold
Author :
Inoue, Kazuo ; Hayashi, Kazuhiro ; Kawasaki, Yoshihiro ; Ohno, Eiji
Author_Institution :
Storage Media Syst. Dev. Center, Matsushita Electr. Ind. Co. Ltd., Osaka, Japan
Abstract :
Optical disk substrates are usually formed using injection-molding method. High mold temperature is necessary to replicate high-density pits, but may cause bad tilt characteristics of substrates. There was a report of a heat insulated mold in which a heat insulating layer was located at the back of a stamper to improve replication characteristics. In this paper we show the results of examination of 40 Gbit/inch2 density molding using the insulated mold and the low mold opening speed technology.
Keywords :
moulding; optical disc storage; heat insulated mold; high-density molding; injection molding; optical disk substrate; pit replication; tilt characteristics; Clamps; Cooling; Deformable models; Electron beams; Insulation life; Shape measurement; Temperature;
Conference_Titel :
Optical Memory and Optical Data Storage Topical Meeting, 2002. International Symposium on
Print_ISBN :
0-7803-7379-0
DOI :
10.1109/OMODS.2002.1028706
