THIN INJECTION-MOLDED SUBSTRATE FOR HIGH-DENSITY RECORDING PHASE-CHANGE REWRITABLE OPTICAL DISK

被引：25

作者：

OHTA, T ^{[1
]}

INOUE, K ^{[1
]}

ISHIDA, T ^{[1
]}

GOTOH, Y ^{[1
]}

SATOH, I ^{[1
]}

机构：

[1] INFORMAT EQUIPMENT RES LAB,MORIGUCHI,OSAKA 570,JAPAN

来源：

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

关键词：

PHASE CHANGE; OPTICAL DISK; HIGH DENSITY; INJECTION MOLDING; NUMERICAL APERTURE; SUBSTRATE; REWRITABLE; VISIBLE LIGHT; TILT;

D O I：

10.1143/JJAP.32.5214

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A thin disk substrate was examined for use as a high-density recording optical disk. An injection-molded poly-carbonate thin disk substrate of 0.6 mm thickness showed birefringence under 60 nm and small tilt angle under 5 mrad. The track pitch was 1.0 mum and the diameter was 86 mm. The laser source was visible light at wavelength 680 nm, and the numerical aperture (NA) of the optical head was as large as 0.6. This new high-density disk and drive system had the characteristics of wide tilt angle tolerance, equivalent to conventional thick substrates of 1.2 mm, and high-density small mark length of 0.52 mum, giving a carrier-to-noise (C/N) ratio beyond 48 Db. We found that for new high-density disk generation, thin disk substrates were suitable.

引用

页码：5214 / 5218

页数：5