Design of Domain Wall Displacement Detection Disk with Groove Recording for High Density and Wide Recording Power Tolerance
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概要
- 論文の詳細を見る
Domain wall displacement detection (DWDD) magneto-optical (MO) recording is the most useful method for achieving high linear density recording without using a higher numerical aperture (NA) objective lenses. Securing a wide recording power tolerance is very important to realize a high density optical storage system. From this point of view, we designed the DWDD disk with groove recording using blue laser and NA 0.60 optics. We optimized the heat sink structure and the displacement layer for groove recording, and we could improve the bit error rate with a track pitch of 0.44 μm and a high linear density of 0.07 μm/bit, which corresponds to 21 Gbit/inch2. Additionally, we developed groove substrates using reactive ion etching (RIE) and O2 plasma treatment. We found that the land shape was very important for the recording power tolerance, and we could obtain a wide recording power tolerance with a bit length of 0.09 μm. We confirmed that we could achieve higher density by using a narrower track pitch while maintaining sufficient recording power tolerance.
- 2003-02-15
著者
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Fujita Goro
Department 2 Optical Disc Development Division Av/it Development Group Sony Corporation
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SAKAMOTO Tetsuhiro
Department 2, Optical Disc Development Division, AV/IT Development Group, Sony Corporation
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Furuki Motohiro
Department 2 Optical Disc Development Division Av/it Development Group Sony Corporation
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Imanishi Shingo
Department 2 Optical Disc Development Division Av/it Development Group Sony Corporation
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Miki Takeshi
Department Of Physical Electronics Tokyo Institute Of Technology
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Imanishi Shingo
Department 2, Optical Disc Development Division, AV/IT Development Group, Sony Corporation, 6-7-35 Kitashinagawa, Shinagawa-ku, Tokyo 141-0001, Japan
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Furuki Motohiro
Department 2, Optical Disc Development Division, AV/IT Development Group, Sony Corporation, 6-7-35 Kitashinagawa, Shinagawa-ku, Tokyo 141-0001, Japan
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Sakamoto Tetsuhiro
Department 2, Optical Disc Development Division, AV/IT Development Group, Sony Corporation, 6-7-35 Kitashinagawa, Shinagawa-ku, Tokyo 141-0001, Japan
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Miki Takeshi
Department 2, Optical Disc Development Division, AV/IT Development Group, Sony Corporation, 6-7-35 Kitashinagawa, Shinagawa-ku, Tokyo 141-0001, Japan
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