Clean Room Technology
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 and microprocessors. Cleanrooms are designed to maintain extremely low levels of particulates, such as dust, airborne organisms, or vaporized particles. Cleanrooms typically have an cleanliness level quantified by the number of particles per cubic meter at a predetermined molecule measure.
Cleanroom classification and standardization
Cleanrooms are classified according to the number and size of particles permitted per volume of air. Large numbers like "class 100" or "class 1000" refer to FED-STD-209E, and denote the number of particles of size 0.5 µm or larger permitted per cubic foot of air. The standard also allows interpolation; for example SNOLAB is maintained as a class 2000 cleanroom.
Class 100 (อนุภาคขนาด 0.5 ไมครอนหรือใหญ่กว่า ไม่เกิน 100 อนุภาคต่ออากาศหนึ่งลูกบาศก์ฟุต)
Class 1000 (อนุภาคขนาด 0.5 ไมครอนหรือใหญ่กว่า ไม่เกิน 1,000 อนุภาคต่ออากาศหนึ่งลูกบาศก์ฟุต)