How does gas engineering ensure the "zero-pollution" delivery of ultra-high purity gases in semiconductor manufacturing?
Publish Time: 2026-02-10
In semiconductor manufacturing, a field with near-perfect requirements for cleanliness and process precision, gas is not only an auxiliary medium but also a core element determining chip yield and performance. From photolithography and etching to chemical vapor deposition and atomic layer deposition, every critical process relies on a stable supply of high-purity or even ultra-high-purity gases. Any tiny particles, moisture, oxygen, or organic contaminants can cause wafer surface defects, device short circuits, or even batch scrapping. Gas engineering—more precisely, the engineering of special gas delivery systems in high-tech factories—must construct a closed-loop system that ensures "zero pollution" from source to end.
1. All-metal high-purity material system: Eliminating endogenous contamination
"Zero pollution" stems first and foremost from the ultimate selection of materials. 1. All wet components in the gas delivery system, including pipes, valves, joints, and filters, are made of electrolytically polished 316L stainless steel, effectively inhibiting particle adhesion and moisture adsorption. The sealing method utilizes all-metal seals, completely eliminating non-metallic materials such as rubber O-rings that are prone to aging and releasing organic matter.
The system employs a fully welded structure, minimizing detachable connection points. Pipeline connections generally use fully automated rail argon arc welding, with high-purity argon gas protection throughout, resulting in smooth, dense welds free of oxidation and slag inclusions. The pipeline layout follows the principle of "no blind ends, no dead zones," with automatic purge ports at the end of all branches to prevent gas stagnation and impurity accumulation. For highly toxic or spontaneously combustible gases, a double-pipe design is used, with the outer pipe continuously purged with nitrogen and equipped with leak detection, achieving intrinsic safety.
3. Multi-stage Precision Filtration and Online Real-time Monitoring
Even with a highly clean front-end system, to meet extreme process requirements, the Gas Engineering division still installs multi-stage terminal filtration before the point of use: including a 0.003 μm particle filter, a deep dehydration device below -80℃ dew point, and a chemical adsorption purifier for specific impurities. Simultaneously, the system integrates a high-sensitivity online analyzer that can monitor ppb or even ppt-level impurity concentrations in real time, and connects the data to a central monitoring platform to achieve millisecond-level early warning and automatic interlocking shutdown.
4. Positive Pressure Inert Environment and Rigorous Validation Process
After system installation, multiple rounds of high-purity nitrogen or process gas purging are required, and a slightly positive pressure state must be maintained for a long period to prevent outside air infiltration. Before delivery, a full set of validation tests must be passed: including helium mass spectrometry leak detection, particle counting, dew point testing, oxygen content analysis, etc. Only when all parameters meet the standards can the system be put into production.
5. Intelligent Operation and Maintenance Throughout the Entire Lifecycle
The Gas Engineering division not only provides hardware construction but also provides comprehensive support throughout the entire lifecycle of design, construction, commissioning, and operation and maintenance. By leveraging a digital platform for remote monitoring, predictive maintenance, and electronic record-keeping, the system maintains a "zero-pollution" state throughout its entire lifecycle, truly fulfilling its service commitment of "stability, safety, reliability, and environmental friendliness."
Gas "purity" is no longer a technological option, but a fundamental requirement for manufacturing. Gas engineering, through the deep integration of materials, processes, monitoring, and management, transforms "zero pollution" from a concept into a quantifiable, verifiable, and sustainable engineering reality, laying a solid foundation for the high-quality development of the global semiconductor industry.
