The format covers both read-only discs, which are used to distribute high-definition movies, and read-and-write discs. The format uses a short-wavelength blue laser and the same disc technology used in current DVDs -- back-to-back bonding of two 0.6-mm-thick, 120-mm discs. This would increase the capacity of read-only discs to 15 GB for a single-sided, single-layer disc, and to 30 GB for a single-sided dual-layer disc, and would push the capacity of read-and-write discs, which currently are single-sided with a single-layer, to 20 GB. The increased capacity of the proposed format is achieved by employing a blue laser and by using the two companies' new signal-processing and phase-change media recording technologies. Contacts: Toshiba Corp. press@toshiba.co.jp or NEC Corp. d-mathieson@bu.jp.nec.com
For more information, visit: www.toshiba.co.jp/index.htm; www.nec.com