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Concept

EUV lithography

A photolithographic wafer with a central square illuminated by a soft pink glow, symbolizing the EUV lithography process.

Photolithographic process that uses extreme-ultraviolet light at 13.5 nanometres to pattern features on silicon wafers far smaller than any visible-light system could reach. The optical column is built from mirrors rather than lenses, polished by Zeiss SMT in Oberkochen to a smoothness measured in tens of picometres. ASML in the Netherlands integrates them into the machines that print every leading-edge microchip.

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