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Pioneer and Mitsubishi developed write-once Blu-ray disc

Posted on Monday, June 13 2005 @ 02:53:21 CEST by

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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