pho·​to·​mask ˈfō-tō-ˌmask How to pronounce photomask (audio)
plural photomasks
: a pattern of opaque material used to shield selected areas of a surface (as of a semiconductor) in deposition or etching (as in producing an integrated circuit) : mask sense 3d

Examples of photomask in a Sentence

Recent Examples on the Web From there the light continues its journey until it is projected onto the wafer [bottom center], carrying the photomask’s pattern. IEEE Spectrum, 29 July 2023 To print the patterns at nano-meter levels, semiconductor makers have to rely on what’s called computational lithography—or specialized computer models—to optimize the photomask and prevent defects during the manufacturing process. Michael Kan, PCMAG, 21 Mar. 2023 According to Zhao, to fabricate one photomask would cost about €3000 (3500 USD). IEEE Spectrum, 23 Jan. 2023 To imprint microchannel networks on each of AKVO’s CDs, a microchannel photomask is needed. IEEE Spectrum, 23 Jan. 2023

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'photomask.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


photo- + mask entry 1

First Known Use

1963, in the meaning defined above

Time Traveler
The first known use of photomask was in 1963

Dictionary Entries Near photomask

Cite this Entry

“Photomask.” Dictionary, Merriam-Webster, Accessed 8 Dec. 2023.

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