The characteristics of a cleanroom include the following aspects:

1. Air Purity:

   • Filtration System: Utilizes high-efficiency filters (such as HEPA or ULPA) to remove airborne particles, bacteria, and contaminants.
   • ISO Classification: Cleanroom cleanliness is classified according to International Organization for Standardization (ISO) standards, ranging from ISO 1 (the cleanest) to ISO 9 (the dirtiest).

2. Airflow:

   • Unidirectional Flow: Typically designed with unidirectional airflow to minimize contaminants and cross-contamination.
   • Airflow Speed: Controls the speed and direction of airflow to ensure even distribution and prevent the accumulation of contaminants.

3. Temperature and Humidity Control:

   • Constant Conditions: Maintains stable temperature and humidity levels to ensure the stability of materials and equipment, and to prevent issues such as static electricity and other contamination problems.

4. Personnel Management:

   • Protective Clothing: Personnel entering the cleanroom must wear specialized protective clothing, including full-body suits, gloves, masks, and shoe covers, to minimize the introduction of contaminants.
   • Behavioral Protocols: Strict operating procedures and behavior protocols are enforced to avoid unnecessary contamination.

5. Material and Equipment Cleanliness:

   • Pre-Treatment: Equipment and materials entering the cleanroom typically undergo cleaning and disinfection processes to prevent the introduction of external contaminants.

6. Monitoring and Maintenance:

   • Real-Time Monitoring: Equipped with monitoring devices to track air quality, temperature, humidity, and other parameters in real-time to ensure the environment meets required standards.
   • Regular Maintenance: Regular inspections and maintenance of cleanroom equipment and systems to ensure their long-term effectiveness.

7. Environmental Design:

   • Material Selection: Materials and surfaces used inside the cleanroom should be easy to clean and resistant to generating contaminants.
   • Layout Design: Layout is typically designed to avoid dead zones and areas that are difficult to clean, facilitating cleaning and maintenance.

These characteristics work together to ensure that the cleanroom maintains a highly controlled, contaminant-free environment, supporting high-precision production and research activities.