Pioneer and Mitsubishi developed write-once Blu-ray disc

Posted on Monday, Jun 13 2005 @ 02:53 CEST by Thomas De Maesschalck
Mass production of HD DVD-R discs was announced on Wednesday and now there is the report of Mitsubishi and Pioneer who announced the development of write-once Blu-ray discs. Until now the only writable Blu-ray media were rewritable discs. The companies plan to propose this media as BD-R to the Blu-ray Disc Association.


The companies report that BD-R's have a spin coated organic die, 0.1mm thick coating, 25GB capacity, 6 percent level of jitter and 40 percent reflection rate, which is close to the specifications of the Blu-ray disc format. Mitsubishi Kagaku Media was one of the developers of the HD DVD-R disk. It developed a separate organic die to be used in the BD format disk, a company spokesman said.

Pioneer, which led development of the write-once DVD format, said it also intends to take the lead in developing a write-once disk for the BD format. Pioneer and Mitsubishi Chemical Media have been collaborating on disk development since last autumn as the drive and media makers.

A unified next-gen DVD format seems far away. Sony's president recently said that the chances for a unified next DVD format are unlikely.

Source: CD Freaks


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Thomas De Maesschalck

Thomas has been messing with computer since early childhood and firmly believes the Internet is the best thing since sliced bread. Enjoys playing with new tech, is fascinated by science, and passionate about financial markets. When not behind a computer, he can be found with running shoes on or lifting heavy weights in the weight room.



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