PREMASTERED OPTICAL DISK BY SUPERRESOLUTION

被引：81

作者：

YASUDA, K

ONO, M

ARATANI, K

FUKUMOTO, A

KANEKO, M

机构：

[1] Corporate Research Laboratories, Sony Corporation, Shinagawa-ku, Tokyo, 141

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1993年 / 32卷 / 11B期

关键词：

PREMASTERED OPTICAL DISK BY SUPERRESOLUTION (PSR); GE2SB2TE5; PHASE-CHANGE MATERIAL; COMPACT DISC;

D O I：

10.1143/JJAP.32.5210

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Premastered optical disk by superresolution (PSR) for practical use has been achieved for the first time. The PSR disk has a phase-change material Ge2Sb2Te5 with stoichiometric composition. Superresolution results from a high contrast ratio of reflectance in the light spot between highly reflective crystal region and lowly reflective melted region. A high C/N ratio of 56 Db is obtained at a pit length of 0.4 mum using PSR. The C/N ratio is still as high as 50 Db for a pit length of 0.3 mum. The PSR disk with double linear densities of current CD is successfully read out with a clear eye pattern and a low error rate using current optics.

引用

页码：5210 / 5213

页数：4