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http://dx.doi.org/10.3795/KSME-A.2002.26.4.631

Effect of Insulation Layer on Birefringence and Land-groove Pattern in DVD-RAM Substrate  

Gang, Sin-Il (Dept.of Mechanical Electronics Engineering, Yonsei University)
Kim, Yeong-Min (Dept.of Mechanical Engineering, Yonsei University)
Seong, Gi-Byeong (Dept.of Mechanical Engineering, Yonsei University)
Lee, Jun-Seok (LG Electronics)
Lee, Seung-Won (LG Electronics)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.26, no.4, 2002 , pp. 631-636 More about this Journal
Abstract
It is necessary to improve mechanical and optical properties in the optical disk substrates as the information storage devices with high storage density using blue laser are being developed. Injection compression molding is regarded as the most suitable process to manufacture optical disk substrates for quality recording and read-out. In the present research, the effects of mold temperature and the insulation layer thickness on gapwise birefringence and the land-groove pattern were investigated. It was found that the values of the birefringence distribution were very sensitive to mold temperature history, and the level of birefringence reduced and, furthermore, the quality of replication was improved due to the insulation layer.
Keywords
DVD-RAM; Injection Compression Molding; Optical Disk Substrates; Birefringence; Insulation Layer;
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