First, because EUV light is absorbed by air (in contrast with 193 nm light), the entire optical system, from source to wafer, must be enclosed in a near-vacuum environment. Second, because EUV ...
their work is centered around a lab-developed driver system dubbed the Big Aperture Thulium (BAT) laser. EUV is a type of photolithography that uses 13.5 nm extreme ultraviolet light from a ...