Large capacity and high-data-rate phase-change disks

Citation
Y. Kasami et al., Large capacity and high-data-rate phase-change disks, JPN J A P 1, 39(2B), 2000, pp. 756-761
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Volume
39
Issue
2B
Year of publication
2000
Pages
756 - 761
Database
ISI
SICI code
0021-4922(200002)39:2B<756:LCAHPD>2.0.ZU;2-D
Abstract
Large-capacity phase-change disks permitting higher data-transfer rates hav e been developed for 0.85 numerical-aperture (NA) recording systems. Three methods to improve the recording data rate were examined. First, the record ing layer was sandwiched by ceramic layers for the purpose of promoting nuc leation. Second, signal properties were evaluated with a disk that had a so -called absorptivity-controlled structure. Third, these two methods were co mbined so that they functioned together in one disk. The disk structure was optimized separately for 640 nm and 407 nm wavelengths. With the disk desi gned for 640 nm wavelength, a user capacity of 9.2 GB and a user data-trans fer rate of 50 Mbps were obtained. These quantities were 22 CB and 35 Mbps with the disk designed for 407 nm wavelength. (The disk diameter was 120 mm and the format efficiency was 80%.).