LG Electronics GSA-4165B Recording format using organic dye material DVD-R/DVD+R, Disc structure

2) Recording format using organic dye material (DVD-R/DVD+R)

*The format that records data through the creation of recorded marks by changing the organic dye material with a laser beam.

> Disc structure

DVD-R DVD+R

Adhesive layer

Protective layer

Reflective layer Recording layer(dye)

Disc substrate

Adhesive layer

Protective layer

Reflective layer Recording layer(dye)

Disc substrate

> Disc structure

[Recording]

Recording is done by changing the organic dye layer and the substrate with a laser when a strong is applied to a disc, the temperature of the ortanic dye material goes up, the dye is decomposed and the substrate changes at the same time. At this time, a durable bit is created as is the case with a CD-ROM.

[Playback]

Signals are read with the differences of the reflection of a laser from pits.

Adhesive layer

Protective layer

Reflective layer

Dye layer

Substrate

Laser beam

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