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Photomasks are used to perform photolithography to transfer the pre-designed layout on to the substrates, normally a thin slice of silicon known as a wafer in the case of chip manufacturing.

Several masks are used in turn, each one reproducing a layer of the completed design, and together they are known as a mask set.

SUNUM uses highquality ultrasmooth 5inch quartz plates coated with 100 nm chromium and anti-reflectance (HOYA Company). We use electronbeam lithography to expose the pre-designed layout with the state of the art equipments in ISO 14644 certified cleanrooms.

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