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How does a re-writeable DVD work?

Updated: 8/20/2019
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12y ago

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The recording layer in DVD+RW and DVD-RW discs is a phase change metal alloy (often GeSbTe) whose crystalline phase and amorphous phase have different reflectivity. The states can be switched depending on the power of the writing laser, so data can be written, read, erased and re-written. DVD-R and DVD+R discs use an organic dye.

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Q: How does a re-writeable DVD work?
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What is the full name of DVD RW?

Digital Versatile Disc - Rewriteable


Can I buy reusable media for my dvd player?

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Can PC DVDs work on DVD players?

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