There are generally two types of one-way flow cleanrooms, namely horizontal flow and vertical flow. In a horizontal flow system, airflow flows from one wall to another.

Electromagnetic waves generated by electrostatic discharge can cause noise and misoperation of electronic instruments and devices; The luminescence of electrostatic discharge can cause photosensitive damage such as photographic limb film, and such accidents.

Purification refers to the removal of unwanted or harmful impurities to make the articles reach the purity level. An engineering discipline that removes pollutants such as particles, harmful air and bacteria from the air within a certain range of space, and controls indoor temperature, cleanliness, pressure, airflow velocity and airflow distribution, noise, vibration, lighting, and static electricity within a certain range of requirements.