Crystal Disc

Crystal disc, manufactured by the largest CD factory in Japan - Memory Tech Corporation, is a revolutionary Compact Disc using glass substrate instead of polycarbonate. This newly developed technology allows sound reproduction at a level previously unknown and is as close to the master sound source as cutting edge technology allows. For this purpose, Crystal disc is fabricated by our Laser Disc technology cultivated over many years with using the best selected materials.

■ The use of glass substrate instead of conventional polycarbonate substrate. As the reflective layer, gold is adopted in exchange for conventional aluminum.

■ For pit transcription, Photo Polymerization process(2P process) using a metal stamper is adopted. This process makes pit transcription highly precise compared with the conventional injection molding process. The technology of 2P process was cultivated by our production of test discs for calibrating industrial optical pick up heads.

■ Surface flatness of glass substrate is much superior to the conventional CD. Glass substrate is hardly influenced by the variation of temperature and humidity. Furthermore, the absence of birefringence coming from the optical uniformity of glass substrate realized signal with extremely low noise and low jitter.

Comparison of Reproduced Signal
CRYSTAL CD vs. conventional CD Polycarbonate

A manufacturing medthod - Photo Polymerization (known as 2P process)

* Logo of Crystal Disc is registered trademark of Memory Tech Corporation.