A Class 100 Cleanroom refers to a cleanroom where the number of dust particles with a diameter of 0.5 micrometers or larger in each cubic foot of air does not exceed 100. This level of cleanliness is typically used in industries and applications that require extremely high purity, such as semiconductor manufacturing, pharmaceuticals, biotechnology, aerospace, and the production of high-precision instruments.

Here are some key points about 100-level cleanrooms:

Air Filtration System: Cleanrooms of Class 100 typically equip with High Efficiency Particulate Air (HEPA) or Ultra Low Penetration Air (ULPA) filters to ensure the particle count in the air remains within the specified range.

Airflow Pattern: To maintain cleanliness, Class 100 cleanrooms typically employ Laminar Flow design, where air moves unidirectionally through the room, minimizing turbulence and particle accumulation.

Pressure Control: Cleanroom interiors are typically maintained at positive pressure to prevent external contaminants from entering. By controlling the pressure differential between the interior and exterior, unfiltered air can be effectively prevented from entering the clean area.

Personnel and Item Management: Individuals entering the 100-level cleanroom must wear specialized cleanroom attire, gloves, masks, and other protective gear to minimize contamination introduced by the human body. Items must also undergo rigorous cleaning and disinfection procedures before entering the cleanroom.

Regular monitoring and maintenance: To ensure the cleanliness of the cleanroom meets standards, regular monitoring and maintenance are necessary, including air quality testing, equipment calibration, and filter replacements.

Design and Construction: The design and construction of a Class 100 cleanroom must comply with relevant international standards such as ISO 14644-1 and Federal Standard 209E. These standards define the classification, testing methods, and compliance requirements for cleanrooms.

The construction and maintenance costs of a Class 100 cleanroom are high, but it is an indispensable investment for production and research environments requiring extremely high cleanliness.