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Although commercially released music CDs have been around
since 1982 it wasn't until 1988 that Sony and Philips developed the
CD-R and orange book standard. Sony and Philips worked closely with
Taiyo Yueden to develop a photosensitive dye that could be used encode
the digital data by burning with a laser. This dye is sandwiched
between the plastic layers of a CD-R, the burning of the digital data
alters the reflective state of the dye and then this information can be
read back by a standard CD drive or CD player. This dye technology lead
to the first available CD-R in the early nineties. The first CD-R's and
CD recorders were extremely expensive. By the end of the nineties as
CD-R media became mass produced the price dropped significantly and
various companies developed CD duplication machinery to burn data or
audio onto CD-R media |
