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What
is a Cleanroom?
A cleanroom is an enclosed (isolated) work area which incorporates
high standards of control -- humidity, temperature and filtration
to minimize all forms of particulate matter and contamination.
The degree of cleanliness required in a
cleanroom facility is dependent upon the work performed in the
room. Cleanroom cleanliness levels refer to the amount of
contamination present in the atmosphere when there are no people in
the room.
Cleanrooms are classified according to the amount and size of
particulate contamination which exists in the work area. Air
cleanliness classes are determined by Federal Standard no. 209E.
Briefly stated, they are as follows.
- Class 10 -- particle
count not to exceed a total of 10 particles per cubic foot
of a size 0.5 microns and larger, and zero particles of
5.0 microns and larger.
- Class 100 -- particle
count not to exceed a total of 100 particles per cubic foot
of a size 0.5 microns and larger, and zero particles of
5.0 microns and larger.
- Class 1000 -- particle
count not to exceed a total of 1000 particles per cubic
foot of a size 0.5 microns and larger, or 6.5 particles
per cubic foot of a size 5.0 microns and larger.
- Class 10,000 -- particle
count not to exceed a total of 10,000 particles per cubic
foot of a size 0.5 microns and larger, or 65 particles per
cubic foot of a size 5.0 microns and larger.
- Class 100,000 -- particle
count not to exceed a total of 100,000 particles per cubic
foot of a size 0.5 microns and larger, or 700 particles
per cubic foot of a size 5.0 microns and larger.
- 797 Pharmacudicle
Mixing Labs --
Cleanroom operators are continually
striving to provide cleaner work areas. Some manufacturers are
moving towards class 10 and Class 1 cleanrooms (or clean work
stations), which will virtually prohibit the use of current work
methods. These cleanrooms may eventually require the use of robots
to perform super clean work.
Cleanrooms may be constructed using different air flow designs to
maximize particulate control. Cleanrooms generally are designed to
provide vertical or horizontal flow of filtered air in the work
space.
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