Compact disc manufacturing is the process by which commercial compact discs (CDs) are replicated in mass quantities using a master version created from a source recording. This may be either in audio form (CD-Audio) or data form (CD-ROM). This process is used in the mastering of CDs, and does not include CD-Rs or DVDs, although these are made using similar methods.
A compact disc (CD) can be used to store audio, video, and data in various formats which are defined in the Rainbow Books. A CD is usually manufactured in a class 100 or better clean room, and can usually be manufactured with strict manufacturing tolerances for only a few US cents.
CD mastering differs from burning, as the pits and lands of a mastered CD are moulded into the CD, rather than being 'burn marks' (phase changes) by a CD burner.
Reference - en.wikipedia.org/wiki/CD_manufacturing
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