A review of recent developments in CD-R technology is given. This covers the physical design principles of the disc together with its production methods. We review all the subsequent manufacturing steps. The relevance of groove replication, substrate conditioning, dye solution and solvents, spinning methods, dye coating process conditions, dye layer drying, sputtering and lacquer coating on the CD-R disc performance are presented. The differences in the recording mechanism for several types of dyes are illustrated. The two modified new phthalocyanine and cyanine processes are described. Some technological implications for higher density recordable formats like DVD-R will be given.
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