Disc Manufacturing Technology and Equipment
DVD Laser Beam Recorder
with respect to CD, DVD only requires changes to recorder mask.
Ultra violet laser, argon ion
Wavelength of 351 nanometres
c.5000 hours lifetime
final objective lens, n.a. 0.9
aperture for CD mastering
spot beam focus checker is mot critical part.
yield rate for DVD (SS/SL): 90%
Operation in DVD or CD mode
Identical glass preparation and chemicals
elliptical spot for CD mastering
reduces resolution across track
maintains DVD resolution along track to improve control of pit ends.
200 - 300 master titles per month
1.2 - 1.5 million stamped discs per month