A method for manufacturing optical information carriers, in which a photoresist layer (20) on a master disc (5) is exposed by a radiation beam (19). The intensity of the radiation beam is controlled by a modulator (14) and a control device (10) in such a manner that the exposure dose has a constant...http://www.google.ca/patents/US5790512?utm_source=gb-gplus-sharePatent US5790512 - Optical information carrier
