The technology wherethe American Iomega corporation acquired patent in 2005 May,records the bulk data to DVD. On the basis of nano- technology, using the sub wave length structure which is shorter than wave length of light, it assumes that it records the data. In addition, when memory capacity has been made to increase substantially, with the technology which is called the multiple level format, is. With AO-DVD, at the cost which isequal to former DVD, be able to recordthe data of capacity of 40 - 100 times that former DVD, transfer rate assumes that it reaches to also 5 - 30 times.
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