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A CLEANROOM is a confined area in which the humidity, temperature,
particle matter, and contamination are precisely controlled within
specified parameters. A cleanroom is a facility in which environmental
elements (heat, humidity, microbial growth, etc.) and user cleanliness
are controlled. Generally, a cleanroom is used for assembly/packaging of
sensitive components. A cleanroom combines the use of air filters and
continuous air circulation to produce levels of air borne particles that
are lower, and typically much lower than normal atmospheric dust levels.
Outdoor atmospheric dust levels are on the order of 400,000 particles/ft
3 >0.5µm in size. Cleanroom cleanliness levels generally are agreed to
begin at 100,000 particles/ft 3 and extend down to 0.01 particles/ft 3
or less. |
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