Tellurium-based rewritable DVDs. Digital versatile discs (DVDs) are examples of optical discs. An optical disc digitally stores data (such as music or video) as tiny depressions in a plastic disc. This disc is coated with a fine film of metal and then by another layer of plastic. The information is read by a laser light that reflects from the metal layer,allowing the original data to be reconstructed. Rewritable DVDs (DVD-RW) can be erased and rewritten,typically due to the use of a phase change metal alloy such as germanium-antimony-tellurium (GST). This material,incorporating three metalloid elements,can be altered using a laser beam | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library |
Bildgröße: | 3417 px × 5126 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |