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photomask

/ˈfəʊtə(ʊ)mɑːsk/

noun
- 1. a photographic pattern used in making microcircuits, ultraviolet light being shone through the mask on to a photoresist in order to transfer the pattern.
Scrabble Points: 20
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Photomask
A photomask is an opaque plate with transparent areas that allow light to shine through in a defined pattern. Photomasks are commonly used in photolithography for the production of integrated circuits (ICs or "chips") to produce a pattern on a thin wafer of material (usually silicon). In semiconductor manufacturing, a mask is sometimes called a reticle. Wikipedia
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