A study on UV-curable coatings for HD-DVD: Primer and top coats |
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Authors: | Jeong Ho Moon Hak Soo Han Yong Gun Shul Do Hoon Jang Muyng Do Ro Du Suk Yun |
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Affiliation: | 1. Department of Chemical Engineering, Yonsei University Korea, Seodaemun-gu, Shinchon-Dong, 134, Seoul 120-749, Republic of Korea;2. Media Solution Team, Digital Media R&D Center, Samsung Electronics Co. Ltd., 416, Maetan-3Dong, Paldal-Gu, Suwon City, Kyungki-Do 442-742, Republic of Korea |
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Abstract: | This study relates to the development of coatings for optical discs in high-density digital versatile disc systems (HD-DVD or blue lay disk) that use a high numerical aperture of 0.85 at 405 nm wavelength and have a protective top layer over a primer layer for protection against damage and dust. Ultraviolet-curable raw materials of two acrylic monofunctional monomers ( isobornylacrylate, IBA and tetrahydrofurfurylacrylate, THFA) and two kinds of urethaneacrylate oligomers (OUMD and OUME) have been easily mixed with photoinitiators. Curing rate of these materials was characterized by FT-IR. In case of top coats, VTES (vinyltriethoxysilane) and acrylic acid were added to enhance the abrasion resistance. These two kinds of UV-curable resinous materials having no solvent were synthesized and investigated as means for making a blue ray disk having good optical and mechanical properties. In addition, dynamic characteristics including reflectivity, fluctuation of RF signal and noise level were also investigated. |
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Keywords: | High-density digital versatile disc (HD-DVD) Blue lay disk (BD) Protective layer Primer UV curable Silane coupling agent |
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