ASUS CD-R/RW Drive User’s Manual
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VI. APPENDIX
HOLE
ADDITIONAL CD-R AREA
LEAD-IN AREA
PROGRAM AREA
LEAD-OUT TRACK
Basic Principles of CD-R and CD-RW Media
A blank CD-R or CD-RW disc is divided into areas (see illustration below). This
differs from a prerecorded disc by the additional CD-R/RW area, which lies in front
of the lead-in area.
A Cross-section: A CD-R Disc
A disc comprises different layers.
PREFORMED TRACKS
PROTECTIVE AREA
REFLECTIVE LAYER (GOLD)
RECORDING LAYER
PLASTIC SUBSTRATE
•
Transparent plastic material (the same as conventional CDs) is used as the sub-
strate.
•
Onto this a special greenish tinged translucent layer is applied. The substrate has
already been provided with a preformed track spiral into which the data will be
written during recording.
•
On top of the green recording layer is a reflective gold layer and a protective
layer of plastic material.
VI.
Appendix
CD-R/R
W
Media