building part cleanroom 2021-02-02T21:33:40.901Z A building part which is maintained such that the number of foreign particulates within it is controlled. The cleanliness level of a cleanroom is quantified by the number of particles per cubic meter at a predetermined molecule measure. Cleanrooms are designed to maintain extremely low levels of particulates, such as dust, airborne organisms, or vaporized particles. Cleanroons are used in the manufacture of pharmaceutical items, integrated circuits, CRT, LCD, OLED and microLED displays. clean room