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Hitachi develops 200GB holographic disk

Posted: 19 Jan 2005 ?? ?Print Version ?Bookmark and Share

Keywords:hitachi maxell? holographic disk? inphase? drive system?

Hitachi Maxell Ltd intends to begin sampling a holographic disk with a 200GB capacity in Fall 2005, and incorporate the disk next year in InPhase's drive system.

Hitachi Maxell invested in InPhase in 2002 and began developing holographic disks for InPhase's drive system. Although InPhase is working with other media partners on the drive, Hitachi Maxell is the furthest along in development, said a Hitachi spokesman.

The 5-inch (130mm) disk has a holographic system that writes and reads data with a blue laser. The laser beam splits into two beams, a signal beam that convey data and a reference beam. Data to be stored is encoded into data pages, which are written in multiplex in the storage media.

The company carries a 400GB tape cartridge for computer backup, but a disk form should be available if users want to access the data, said the spokesman.

Hitachi Maxell is aiming to develop a second-generation holographic disk with a 400GB capacity by 2007.

Tokyo-based venture company Optware Corp. is developing a 120mm disc system and demonstrated practical recording and read out of a video footage last August. The company also intends to introduce a holographic disk system next year.

- Yoshiko Hara

EE Times




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