How 99.9995%+ nitrogen and downstream gas purification enable particle-free wafer processing, oxidation, and packaging.
Semiconductor manufacturing demands the highest gas purity of any industry. A single particle or oxygen molecule on a wafer surface can cause a $100,000+ batch rejection. Standard PSA nitrogen at 99.999% is insufficient — wafer fabs require 99.9995%+ (6N+) nitrogen with <1 ppb residual oxygen.
Achieving this level requires a two-stage approach: (1) PSA nitrogen generator producing 99.999% N2, followed by (2) downstream getter purifier removing remaining O2, N2, CO, and H2O to ppb levels.
| Process | Gas | Purity | Flow | Critical Spec |
|---|---|---|---|---|
| Wafer Cleaning | N2 | 99.9995%+ | 100-500 Nm3/h | Particle-free (Class 1) |
| Oxidation | O2 / N2 | 99.9999% | 50-200 Nm3/h | <1 ppb H2O |
| CVD/PVD | N2 / Ar | 99.9999%+ | 200-1,000+ Nm3/h | Electropolished 316L |
| Packaging | N2 | 99.999% | 50-100 Nm3/h | Moisture-free |
All gas delivery systems must use electropolished 316L stainless steel tubing with orbital welding to prevent particle generation. SCADA integration (Modbus/Profinet) enables continuous monitoring and automated purity alarms.