The electronics manufacturing industry has high requirements for air cleanliness in the production environment, especially during the production process of semiconductors, display panels, precision electronic components and new energy electronic products. Tiny particles may adhere to the surface of the product, affecting product performance, yield and reliability. Therefore, scientifically designing the air filtration system and establishing complete particle control measures are important links in the dust-free workshop of electronic manufacturing.
1. Why does electronic manufacturing need to strictly control air particles?
During the manufacturing process of electronic components, dust, fibers, metal particles and other particles in the air may become sources of pollution. Although some tiny particles are invisible to the naked eye, they may be deposited on the surface of wafers, circuit boards, display panels or precision components.
When particle control is not in place, it may cause circuit defects, product contamination, short circuits or yield decline. Therefore, dust-free workshops need to reduce particle pollution through measures such as air filtration, air flow organization, pressure difference control, and personnel management.
2. Basic structure of dust-free workshop air filtration system
Electronic manufacturing dust-free workshops usually adopt a multi-stage air filtration structure:
Fresh air → Primary filter → Medium-efficiency/bag filter → Air treatment equipment → High-efficiency or ULPA terminal filter → Clean production area
The primary filter mainly intercepts larger dust, fibers and other particles to protect subsequent filtration equipment.
Medium-efficiency or bag filters have a larger filtration area and dust-holding capacity, which can further reduce the concentration of particulate matter in the air while reducing the load on the high-efficiency filter.
HEPA or ULPA filters are usually installed at the end of the clean area to efficiently filter fine particles and are an important part of maintaining the cleanliness of the dust-free workshop.
3. The importance of airflow organization for particle control
Only installing high-efficiency filters does not guarantee that the dust-free workshop achieves ideal particle control effects. Proper airflow organization is equally important.
For high-cleanliness areas, one-way flow or other airflow organization methods suitable for the process can be used so that the clean air filtered at the end can continuously replace the polluted air and reduce the residence and deposition of particles in the production area.
At the same time, the positions of the air supply, return and exhaust vents should be reasonably designed to avoid local air flow short circuits, dead corners or turbulence.
IV. Filtration solutions for different areas
1. General electronic assembly area
Primary effect + medium effect filtration can be used, and terminal HEPA filters can be configured according to cleanliness requirements.
2. Precision electronic manufacturing area
For production areas that are sensitive to particle pollution, terminal filtration and air flow organization should be strengthened. HEPA filters can be used in conjunction with the FFU system to achieve a more stable clean air supply.
3. Semiconductors and high-cleanliness areas
For production processes such as wafers and chips that are extremely sensitive to particles, HEPA or ULPA filters should be selected according to the target cleanliness level, and combined with high air exchange times, unidirectional flow and strict pressure difference control for comprehensive design.
5. What parameters should you pay attention to when selecting an air filter?
When selecting filters for electronic manufacturing dust-free workshops, you should focus on the following parameters:
Filtration efficiency: determined according to the target cleanliness level and particle control requirements;
Rated air volume: meets the design air volume of the clean room;
Initial resistance and final resistance: affect fan energy consumption and system operation stability;
Filter Material performance: should have stable filtration efficiency and structural strength;
Filter size: ensure matching with FFU, air duct or terminal air supply equipment;
Sealing performance: avoid bypass leakage at the edge of filter installation;
Service life: determine the replacement cycle based on pressure difference changes and actual operating environment.
For high-cleanliness electronic manufacturing environments, the performance of the filter itself is important, but the filter frame, sealing structure and installation quality cannot be ignored.
6. Summary
Air filtration and particle control in electronic manufacturing dust-free workshops is a systematic project. A reasonable solution is usually not to simply improve the filter level, but to achieve stable particle control through primary-efficiency filtration, medium-efficiency filtration, HEPA/ULPA terminal filtration, airflow organization, pressure difference control and clean management.
In actual projects, targeted design should be carried out based on the type of electronic products, production process, cleanliness level and air volume requirements. While meeting the cleanliness requirements, system energy consumption, filter life and maintenance costs should be taken into consideration, so as to provide a stable and reliable clean production environment for electronic manufacturing.
Jiangsu Yueboyang Purification Equipment Co., Ltd. focuses on the R&D, production and sales of purification supporting products. It can provide primary, medium, high and ultra-high efficiency filters, FFU fan filter units, high-efficiency air outlets and other product supporting products for clean production environments such as electronic manufacturing and semiconductors. The company has a product system from filters to clean air supply terminal equipment, which can be selected and customized according to the customer's cleanliness level, air volume, installation size and specific process requirements, providing professional product support for air filtration and particle control in electronic manufacturing dust-free workshops.
