New disk allows 6 hours’ taping

Matsushita Co. creates world's 1st read-write optical disk

TOKYO — Matsushita Electric Industrial Co. said Tuesday it has developed the world’s first rewritable, dual-layer optical disk. The disk is compatible with digital videodisks (DVD), and it allows for up to six hours of seamless video recording on a single disk.

The Matsushita disk allows for 8.5 GB continual recording capacity on a single side of a 12-centimeter diameter optical disk.

The technology will be announced at the 59th Japan Applied Physics Conference Technical Lecture on Sept. 15 at Hiroshima U., and then it will be proposed to the DVD Forum, the grouping of companies that developed DVD technology.

Matsushita describes the breakthrough as a “dual-layer rewritable phase-change optical disk technology using phase-change material that can easily achieve compatibility with DVD.”

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