
320px|thumb|right| Entrance to a cleanroom with no air shower thumb|right| Cleanroom used for the production of microsystems. The yellow (red-green) lighting is necessary for [[photolithography, to prevent unwanted exposure of photoresist to light of shorter wavelengths.]] thumb|right| Cleanroom from outside thumb|right| Cleanroom for microelectronics manufacturing with [[fan filter units installed in the ceiling grid]] thumb|right| Cleanroom cabin for precision measuring tools thumb| Typical cleanroom head garment
320px|thumb|right| Entrance to a cleanroom with no air shower thumb|right| Cleanroom used for the production of microsystems. The yellow (red-green) lighting is necessary for [[photolithography, to prevent unwanted exposure of photoresist to light of shorter wavelengths.]] thumb|right| Cleanroom from outside thumb|right| Cleanroom for microelectronics manufacturing with [[fan filter units installed in the ceiling grid]] thumb|right| Cleanroom cabin for precision measuring tools thumb| Typical cleanroom head garment
A cleanroom or clean room is an engineered space that maintains a very low concentration of airborne particulates. It is well-isolated, well-controlled from contamination, and actively cleansed. Such rooms are commonly needed for scientific research and in industrial production for all nanoscale processes, such as semiconductor device manufacturing. A cleanroom is designed to keep everything from dust to airborne organisms or vaporised particles away from it, and so from whatever material is being handled inside it.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).