Compact Disc Recordable
<storage> (CD-R) A write-once version of CD-ROM. CD-Rs can hold about 650
megabytes of data. They are very durable and can be read by normal CD-ROM
drives, but once data has been written it cannot be altered.
Standard prerecorded CDs have their information permanently stamped into an
aluminium reflecting layer. CD-R discs have a dye-based recording layer and an
additional golden reflecting layer.
Digital information is written to the disc by burning (forming) pits in the
recording layer in a pattern corresponding to that of a conventional CD.
The laser beam heats the substrate and recording layer to approximately 250 C.
The recording layer melts and the substrate expands into the space that becomes
available.
Phillips: New Technologies.
See also CD-RW and DVD-RAM.
(1999-08-01)
Nearby terms:
Compact Disc interactive « Compact Disc Read-Only
Memory « Compact Disc Read-Write « Compact Disc
Recordable » Compact Disc Rewritable »
compaction » compactness preserving
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