Semiconductor Gas Analysis Solutions

HF wet-etch and CVD exhaust requires Monel 400 (or nickel alloys) on all wetted parts with PFA internal tubing. Stainless steel is unacceptable — fluoride ion attacks chromium and produces volatile CrF₂ that both fails the material and contaminates the sample. The heated sample line must run above the HF dew point (typically 130–180 °C depending on water content) from probe tip to analyzer inlet. ZS8100-HF is specified with these defaults.

TDLAS analyzers read through a closed optical path without the sample ever contacting consumable reagents or membranes, which preserves purity. For ppb-range H₂O, O₂, or trace impurity monitoring in high-purity specialty gases, the analyzer body typically uses electropolished 316L VAR or nickel wetted parts and all-metal valve seats. The spectroscopy itself does not consume or contaminate the sample — a key advantage over electrochemical or paramagnetic alternatives.

Yes for diffusion / LPCVD furnace process gas monitoring and for post-abatement off-gas. GFC (ZS6500-N2O class) self-references against H₂O and CO₂ matrix drift at the 4.5 μm N₂O fingerprint, which handles wet scrubber outlets cleanly. For sub-ppb audit-grade N₂O (rare in fabs but possible in R&D contexts) the route is TDLAS or CRDS, not GFC.

Usually not. Process analyzers (TDLAS, GFC, UV-DOAS) target ppm to %vol accuracy on a specific stream; safety detectors (electrochemical cells, catalytic-bead, IR point) target %LEL or TLV-level alarm response with multi-point coverage. Fabs normally run both with separate network, calibration, and SIL discipline. GESHINE publishes these as separate product families — process analyzers under the gas-specific categories and safety / LEL detectors under combustible-gas-detectors.