Optical disc with 250 GB storage is being developed by consortium...
Optical disc with 250 GB storage is being developed by consortium of 7 companies and Japan’s National Institute of Advanced Industrial Science & Technology, Nikkei reported. Capacity is 10x greater than blue-laser-based high-definition DVDs now being readied for marketing.…
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Developers of new disc are JVC, Pioneer, Pulstec Industrial, Samsung Japan, Sharp, TDK and Toshiba and it uses Super-RENS (Super-Resolution Near-Field Structure) technology. Surface of disc is covered with 4- nanometer layer of platinum oxide, which dissolves into particles when exposed to heat of laser reading disc. Light generated by reflection of laser from particles is used to read data, and platinum oxide layer acts like lens to focus laser. Group has developed write-once recordable disc; with short-wavelength blue laser, capacity is 80 GB, and with longer wavelength red laser it’s 60-70 GB. Group said capacity would be raised to 250 GB in one year by improving technology -- enough capacity for 20 hours of digital HD video. New optical discs will be comparable with existing ones in cost and other factors, report said.