A cleanroom or clean room is a facility ordinarily utilized as a part of specialized industrial production or scientific research, including the manufacture of pharmaceutical items, integrated circuits, LCD, OLED and microLED displays.

In cleanrooms in which the standards of air contamination are less rigorous, the entrance to the cleanroom may not have an air shower. An anteroom (known as a “gray room”) is used to put on clean-room clothing.

Cleanrooms are designed to maintain extremely low levels of particulates, such as dust, airborne organisms, or vaporised particles.

Some manufacturing facilities do not use fully realized cleanrooms, but use some practices or technologies typical of cleanrooms to meet their contamination requirements.