Definition of photomask in US English:



  • A photographic pattern used in making microcircuits, ultraviolet light being shone through the mask on to a photoresist in order to transfer the pattern.

    • ‘Now two companies have introduced nanomachining systems they say will open up the ability to deal with tiny technologies like quantum dots and photomasks for lithography.’
    • ‘It appears that the costs of not only tools but of photomasks are poised to skyrocket.’
    • ‘Like the technologies used to create the photomasks and microchips, quality assurance tools such as mask and wafer inspection systems are both costly and challenging.’
    • ‘Microlithography projects a pattern from a photomask through an optical system to create IC chips using ultraviolet laser light.’
    • ‘In addition, conventional optical pellicles used to protect the photomasks and the image plane will not work for EUV masks.’
    matte, shadow mask, masking, masking tape
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