Naochiro Yamada

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Phase compositions and thermal stability of different TaC<sub>x </sub> layers deposited by PVD is studied using in-situ high-temperature XRD (HT-XRD). It is found that the phase composition of the as-dep. layers and those during annealing at high temperatures strongly depends on their chemical compositions. Low carbon layers (~Ta<sub>4</sub>C) are amorphous(More)
50GB BD-R media with Te-O-Pd recording material was estimated to have a life expectancy of over 500 years according to acceleration test under stressed conditions. This stable recording material will reduce the possibility to lose important data even in sever storage environment.
  • N. Yamada
  • 1997
Increase of data transfer rate is one of the most important theme for an optical disk used in multi-media systems. Certainly it is required for an optical disk to treat the data of high quality motion pictures and to store LAN data directly. We first proposed Ge-Sb-Te material in Jpn. J. Appl. Phys. Supp.26-4, p.61, 1987; since then we have been studying(More)
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