DigiTimes has also reported that Ritek and CMC are planning to produce both Blu-ray and HD-DVD discs.
Ritek and CMC Magnetics, the top two makers of optical discs in Taiwan, exhibited Blu-ray Disc (BD) and HD-DVD discs at the recent 2006 Consumer Electronics Show (CES) in the US, with each company planning to start volume production of the discs next quarter at the earliest, according to the two companies.

Ritek showcased 25GB BD-R (recordable, write once), 15GB HD-DVD-R, 15GB HD-DVD-RW (rewritable) and 20GB HD-DVD-RAM (also rewritable) discs, all single-sided single-layer, at CES, company spokesman Eric Ai pointed out. The production of HD-DVD discs will come earlier than BD discs, Ai indicated.
The article also mentions that CMC plans to ship 15GB HD-DVD discs when Toshiba launches their HD DVD players in the US and Japan. The company is also developing a double-layer HD-DVD disc with a capacity of 30GB. If you'd like to read more, the entire article can be found here.