Abstract

As candidates for a primary package media in the coming multi-media age, the large capacity optical discs are being watched with keen interest. Following developments of high density ROM discs, discussions on rewritable discs have become animated. Apart from the traditional confrontation between magneto-optics and phase change, another methodological controversy seems to emerge in connection with capabilities toward higher capacities. That is which is promising, conventional in-groove recording technique or land / groove recording technique ^[1] ? We have been examining our phase change disc properties based on the in-groove recording method. We will prove in this article that 3GB or more user capacities are achievable with our phase change discs by employing simple in-groove recording method.

© 1996 Optical Society of America