Dual-layer write-once media for 1x-4x speed recording based on blu-ray disc format

Mayumi Uno; Tetsuya Akiyama; Hideki Kitaura; Rie Kojima; Kenichi Nishiuchi; Noboru Yamada

doi:10.1117/12.532520

16 September 2003 Dual-layer write-once media for 1x-4x-speed recording based on Blu-ray Disc format

Mayumi Uno, Tetsuya Akiyama, Hideki Kitaura, Rie Kojima, Kenichi Nishiuchi, Noboru Yamada

Proceedings Volume 5069, Optical Data Storage 2003; (2003) https://doi.org/10.1117/12.532520
Event: Optical Data Storage 2003, 2003, Vancouver, Canada

Abstract

We have developed dual-layer write-once media with Te-O-Pd based recording films on Blu-ray (BD) format. Recording capacity was 50GB with dual layers on a disk of 120mm in diameter. Rear and Front layers showed jitters of 5.8% and 7.7% at 1x speed, and 6.0% and 8.0% at 2x speed, respectively, which were good enough to satisfy the BD format. Evaluations were carried out with blue-violet laser of 405nm wavelength, objective lens NA of 0.85. Recording linear velocities were 4.92m/s at BD 1x (36Mbps), and 9.84m/s at BD 2x (72Mbps). Characteristics at 4x speed recording were also examined, and it was revealed that carrier to niose ratio at high recording linear velocity of 19.7m/s, which corresponds to BD 4x (144Mbps), was alomst as same as those of 1x and 2x. Recording mechanism was discussed and proposed a model that Te-O-Pd films were not crystallized directly through solid process, but crystallized through melting.

Citation Download Citation

Mayumi Uno, Tetsuya Akiyama, Hideki Kitaura, Rie Kojima, Kenichi Nishiuchi, and Noboru Yamada "Dual-layer write-once media for 1x-4x-speed recording based on Blu-ray Disc format", Proc. SPIE 5069, Optical Data Storage 2003, (16 September 2003); https://doi.org/10.1117/12.532520

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