NettetCD‑SEMS Transition from Scientific Device to Industrial Instrument(5) In 1980, the industry was struggling to develop a process capable of achieving a minimum line width of 1 µm. Steppers had a central role in microfabrication for the 1-µm process but faced problems with CD (critical dimension) control(6). There were also NettetThere are music CDs, DVD or Blue-Ray discs with movies, data CDs or DVDs used for storing photos or data backups. ... A Compact Disc is made of clear plastic 1.2 mm thick, with a thin reflective layer applied to the top (most often aluminum, though the material depends on the disc type).
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