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.