To keep cleanroom clean as it named, there are 4 Cleanliness Principles
that users need to obey. Do not bring in. Do not generate. Do not accumulate. Remove immediately.
Of course, the target is particles. These are some examples to apply for
Do not bring in. Through air shower before entering the cleanroom.
Do not generate. Avoid activities that may generate particles, such as craping hands, tearing
Avoid machines or tools that generate particles in the critical area. If
it is impossible, make partation, check air flow and particles in cleanroom
Do not accumulate. Clean the critical area regularly.
Design layout that is easy to clean and not accumulate particles.
Remove immediately. Create positive pressure to remove the particles generated in the area Use proper cleaning tools to clean the workpieces and area.