Clean room divided into six class,different levels of requiremengts for different levels of purification processes and different coresponding industry.
A,1 level is used in the manufacture of intergrated circuits in the microelectronics industry ,is the highest level of clean room.
B,10 level used in width less than 2 microns for the semicondutor industry.
C,100 level for aseptic manufacturing prosesses, such as the pharmaceutical industry , plant manufacturing the body of artical ,surgery ,transplant surgery ,the integrator system ,
bone marrow transplant petient after the isolation and treatment.
D,1000level for the produtions of high quality optical products , but also for testing, assembling aircraft snake gyroscope ,the assembly of high quality iniature bearings.
E,10000level used in equipment for hydraolic or pneumatic assembly equipment ,food and beverage industry , in addition ,10000 cleanroom used in medical industry. F,100000level used in many industrial sectors, manufacturing optical products ,small electronic components manufacturing large-scale system,manufacturing hydraulic
opneumatic system , Food and beverage production,medical, medicine industry.