CMC Magnetics and Ritek, the top two makers of optical discs, have recently started volume production of 15 GB HD-DVD-R SL (high-definition DVD recordable single-sided single-layer) discs and are prepared to begin production of 30 GB HD-DVD-R DL (single-sided double-layer) discs in the fourth quarter of this year at the earliest, according to industry sources.
Japan-based Mitsubishi Kagaku Media (MKM) and Hitachi Maxell took the initiative globally to bring HD-DVD-R SL discs into volume production in April this year and will do so for HD-DVD-R DL discs next month, the sources pointed out.
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