What are the main sources of pollution in modular clean rooms?

Contamination sources in modular clean rooms not only threaten the accuracy of experiments, but are also likely to undermine product quality and safety. Therefore, clean rooms control contamination through strict air filtration systems, meticulous personnel management, and thorough cleaning procedures.

In modular clean rooms, the main sources of contamination usually include tiny but not negligible particles. They may be dust and clothing fibers brought in by the flow of people, or they may be wear debris generated by the operation of mechanical equipment. In addition, chemical gases and microorganisms are also potential culprits of contamination. Chemical gases may originate from reagents or cleaning agents used in laboratories, while microorganisms often adhere to the human body or equipment surfaces and multiply rapidly once conditions are suitable.

Among these pollution sources in modular clean rooms, pollution generated by various operators and inspection personnel accounts for a large proportion. During the metabolism process of the human body, a large number of chemical substances will be produced, and according to relevant information, there can be more than 500 kinds. Among them, the respiratory tract excretes more than 140 kinds, such as CO, etc.; human skin metabolism, including hair, nails, sebaceous glands, etc., excretes more than 270 kinds of waste, and excretes more than 150 kinds of juice, including CO, acetone, etc.

Even though many product production processes in modern high-tech modular clean rooms have been manufactured in a sealed state, the degree of pollution caused by personnel is reduced. However, in the production of medicines, health products, cosmetics, food, precision machinery and other products, the pollution caused by personnel The proportion is still the main one. The human body contains high concentrations of sodium in liquid form (such as in saliva, tears, sweat), and sodium molecule contamination should be strictly controlled during silicon wafer processing. If personnel apply cosmetics, perfume and hair care products in violation of regulations, smoke, eat food or drugs in or near the clean room (area), serious molecular pollution will occur. Therefore, the more stringent the production process of high-tech products, the more Through strict rules and regulations, all types of personnel entering the modular clean room (area) are controlled from molecular pollution sources.