About cleans
Definition of cleanse:
Smear exists during processing or handling objects will affect the success rate, while controlling the smear on the processing object will increase the success rate. Technology of cleanse and tarnish control, usually called as tarnish control in international, is a technique to control such smears (also including treatment and isolation of harmful substances in the processing or handling objects).
Manipulation of clean air:
Air from outdoor is processed by early effect segment, mixed with indoor return air, and then filtrated by middle effect segment, high effect segment to clean room, to control the number of particles in the air below a certain number.
Air can also be manipulated by heating, cooling, humidification, dehumidification, sterilization and et al, to receive certain state like sterile, constant temperature and humidity.
According to the clean-level, indoor air can be organized in a manner laminar, turbulent flow and mixing.
Clean possession of state:
Empty: Facilities have been completed, all connected to power supply and run, but no production equipment, materials and staff
Dynamic: Facilities have been completed, production equipment has been installed, operation under agree ment of business and vendors agree, but no staff.
Static: Facilities run under stated condition, the presence of stated person and work under promissory state.
Sketch map of principle for clean room:
Clean rank of suspended particles in air of clean room or clean area:
| ISO rank for air cleanness |
Bigger or equal to maximum concentration limits in table (P/m3-air) |
American federal 209E rank for cleanness |
| 0.1um |
0.2um |
0.3um |
0.5um |
1um |
5um |
| ISOClass1 |
10 |
2 |
|
|
|
|
|
| ISOClass2 |
100 |
24 |
10 |
4 |
|
|
|
| ISOClass3 |
1000 |
237 |
102 |
35 |
8 |
|
1 |
| ISOClass4 |
10000 |
2370 |
1020 |
352 |
83 |
|
10 |
| ISOClass5 |
100000 |
23700 |
10200 |
3520 |
832 |
29 |
100 |
| ISOClass6 |
1000000 |
237000 |
102000 |
35200 |
8320 |
293 |
1000 |
| ISOClass7 |
|
|
|
352000 |
83200 |
2930 |
10000 |
| ISOClass8 |
|
|
|
3520000 |
832000 |
29300 |
100000 |
| ISOClass9 |
|
|
|
35200000 |
8320000 |
293000 |
300000 |
Recommend for rank of clean workshop of related industry:
| Rank |
1 |
10 |
100 |
1000 |
10000 |
100000 |
300000 |
| Semiconductor Chip Manufacturing |
√ |
√ |
√ |
|
|
|
|
| Semiconductor Chip Package |
|
√ |
√ |
|
|
|
|
| Electronic Components Production |
|
|
√ |
√ |
|
|
|
| Precision Products |
|
|
|
√ |
√ |
|
|
| Medical Injections |
|
|
√ |
√ |
|
|
|
| Medical Oral Agent |
|
|
|
|
√ |
√ |
|
| Aseptic Ward |
|
|
√ |
|
|
|
|
| Operation Room |
|
|
√ |
√ |
√ |
|
|
| Aseptic Rearing Animals |
|
|
√ |
√ |
|
|
|
| Precision Printing |
|
|
|
|
√ |
√ |
√ |
| Food Packaging |
|
|
|
|
√ |
√ |
√ |
| Food Canning |
|
|
√ |
√ |
|
|
|
|
