The cleanroom is a controlled environment that has a low level of the dust and other pollutants such as different chemical vapours. A cleanroom has a controlled level of contamination that is specified by the number of particles per cubic meter (sq m.) at a specified particle size. Thus, the cleanrooms are classified according to the number and size of particles permitted per volume of air.
The ambient air outside in a typical city environment contains 35,200,000 particles ³ 0.5 µm per sq m. corresponding to an ISO 9 cleanroom which is at the lowest level of cleanroom standards.
CLEAN ROOM facilities from NIRDTP, with a total area of about 144 sq m., consist of 4 rooms, a hallway, and an air shower, with the following level of cleanroom standards: 3 rooms - ISO 5 (3,520 particles ³ 0.5 µm /sq m.); 1 room - ISO 7(352,000 particles ³ 0.5 µm /sq m.); 1 hallway - ISO 8 (3,520,000 particles ³ 0.5 µm/sq m.).
The air entering the cleanroom from outside is filtered to exclude dust, and the air inside is constantly recirculated through high-efficiency particulate air (HEPA) filters to remove internally generated contaminants.
- Operating environment: ISO 5 ISO 7 ISO 8
- Humidity (%): 30 ¸50 30 ¸50 30 ¸50
- Relative pressure: 0+++ 0++ 0+
- Pressure: 10 Pa 9 Pa 8 Pa
- Temperature (°C): 16÷30 16÷30 16÷30
- Emergency illumination: Yes
- Type of illumination system: modular system fixed on the ceiling
- Illumination level: Standard
- Special illumination: YES - yellow light for two cleanrooms (ISO 5) where micro and nanostructured activities are being developed
- Illumination control ON/OFF: Yes
- Door light warning system to allow access or not: Yes.