Rewritable Dual-Layer Phase-Change Optical Disk Utilizing a Blue-Violet Laser
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概要
- 論文の詳細を見る
We have demonstrated for the first time the feasibility of using a rewritable dual-layer phase-change optical disk utilizing a blue-violet laser. For the first medium, we adopted a very thin recording layer with a new phase-change material Ge–Sn–Sb–Te, and a 10-nm-thick silver-alloy reflective layer to obtain a large transmittance and high-quality signals. For the second medium, we optimized the thickness of each layer to obtain both a large optical absorption of the recording layer and a small heat capacity. Carrier-to-noise ratios of more than 50 dB, erasability of more than 30 dB and recording powers of 8 mW for the first medium and 11 mW for the second medium were obtained under typical recording conditions corresponding to a capacity of 27 GB per one side of a 120 mm disk and a user data transfer rate of 33 Mbps.
- 2001-03-30
著者
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NISHIUCHI Kenichi
Optical Devices Research Laboratory, Matsushita Electric Industrial Co., Ltd.
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YAMADA Noboru
Optical Devices Research Laboratory, Matsushita Electric Industrial Co., Ltd.
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Kitaura Hideki
Optical Disk Systems Development Center Matsushita Electric Industrial Co. Ltd.
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NARUMI Kenji
Optical Disk Systems Development Center, Matsushita Electric Industrial Co., Ltd.
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Uno Mayumi
Optical Disk Systems Development Center Matsushita Electric Industrial Co. Ltd.
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Akiyama Tetsuya
Optical Disk Systems Development Center Matsushita Electric Industrial Co. Ltd.
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Kojima Rie
Optical Disk Systems Development Center Matsushita Electric Industrial Co. Ltd.
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Kitaura Hideki
Optical Disk Systems Development Center, Matsushita Electric Industrial Co., Ltd., 3-1-1 Yagumo-Nakamachi, Moriguchi, Osaka 570-8501, Japan
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Kojima Rie
Optical Disk Systems Development Center, Matsushita Electric Industrial Co., Ltd., 3-1-1 Yagumo-Nakamachi, Moriguchi, Osaka 570-8501, Japan
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Nishiuchi Kenichi
Optical Disk Systems Development Center, Matsushita Electric Industrial Co., Ltd., 3-1-1 Yagumo-Nakamachi, Moriguchi, Osaka 570-8501, Japan
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Narumi Kenji
Optical Disk Systems Development Center, Matsushita Electric Industrial Co., Ltd., 3-1-1 Yagumo-Nakamachi, Moriguchi, Osaka 570-8501, Japan
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Uno Mayumi
Optical Disk Systems Development Center, Matsushita Electric Industrial Co., Ltd., 3-1-1 Yagumo-Nakamachi, Moriguchi, Osaka 570-8501, Japan
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