Quantus HP100 High-Pressure Gas Optical Emission Spectrometer

Overview

The Quantus HP100 High-Pressure Gas Optical Emission Spectrometer is an engineered solution for real-time, in-situ plasma and process gas analysis in vacuum-based thin-film manufacturing environments. Operating on the principle of optical emission spectroscopy (OES), the system detects characteristic atomic and molecular emission lines generated during plasma excitation—enabling non-invasive, quantitative monitoring of reactive species, impurity traces, and stoichiometric ratios. Unlike conventional OES systems constrained to low-pressure operation (<10⁻³ Torr), the Quantus HP100 is uniquely designed for stable spectral acquisition across a broad pressure range—from 1 Torr up to atmospheric pressure (760 Torr)—eliminating the need for differential pumping stages or external vacuum manifolds. This capability supports direct integration into PVD sputtering chambers, CVD reactors, and plasma etch tools where pressure transients and gas composition shifts occur dynamically during process ramp-up, steady-state operation, and endpoint transitions.

Key Features

• Plasma excitation frequency optimized at 900 MHz for stable, high-energy electron collisions—ensuring consistent ionization efficiency across multi-component gas mixtures (e.g., Ar/O₂/NF₃/CF₄)
• UV-Vis spectral detection range spanning 190–890 nm with thermoelectrically cooled CCD detector, enabling identification of key diagnostic lines including Ar I (696.5 nm), O I (777.4 nm), F I (685.6 nm), and Si I (288.2 nm)
• Modular plasma probe head with quick-release KF40 or KF50 flange interface—compatible with ISO-K standard vacuum hardware and permitting tool-side installation without chamber venting
• Sub-ppb detection limit for trace contaminants (e.g., H₂O, O₂, hydrocarbons) under controlled calibration conditions, validated per ASTM E2877-22 for trace gas quantification in semiconductor process streams
• 24 Hz spectral acquisition rate—sufficient to resolve transient events such as plasma ignition, stepwise gas injection, and endpoint signatures in sub-second etch processes
• Compact footprint (≤240 mm × 180 mm × 95 mm) and passive thermal design—minimizing heat load on sensitive process chambers and supporting retrofit integration in space-constrained tool platforms

Sample Compatibility & Compliance

The Quantus HP100 interfaces directly with process gases in both inert and reactive chemistries, including but not limited to Ar, He, N₂, O₂, H₂, NH₃, SiH₄, CF₄, SF₆, and NF₃. It maintains measurement integrity in corrosive environments through quartz optical windows rated to ISO 10110 surface quality and stainless-steel wetted components compliant with SEMI F57 standards. The system adheres to electromagnetic compatibility requirements per CISPR 11 Group 2 Class A and meets mechanical safety guidelines outlined in ISO 12100. While not certified as a standalone medical or safety device, its output data may be incorporated into GMP-compliant process control frameworks when paired with validated software modules meeting FDA 21 CFR Part 11 audit-trail and electronic-signature requirements.

Software & Data Management

The Quantus Control Suite provides real-time spectral visualization, peak integration, ratio tracking (e.g., F/Ar, O/Si), and user-defined endpoint algorithms based on intensity derivative thresholds or principal component analysis (PCA). Raw spectra are stored in HDF5 format with embedded metadata (timestamp, pressure, RF power, gas flow rates). Export options include CSV, ASCII, and XML schemas compatible with factory MES systems (e.g., Siemens Opcenter, Applied Materials EnduraLink). Software validation documentation—including IQ/OQ protocols and change control logs—is available upon request to support GLP/GMP audits. Remote diagnostics and firmware updates are supported via TLS-secured Ethernet connection; no cloud-hosted processing is performed—the system operates fully offline to preserve data sovereignty.

Applications

• Endpoint detection in plasma etch processes (e.g., SiO₂ stop-on-Si, TiN etch in DRAM fabrication), leveraging time-resolved emission intensity decay of carbon- or fluorine-containing species
• Gas composition verification during PVD target poisoning events, using O/Ar or N/Ar line ratios to infer reactive gas partial pressures
• In-chamber leak detection via continuous monitoring of air-derived N₂ (337.1 nm) and O₂ (777.4 nm) emissions during base-pressure stabilization
• Plasma uniformity mapping across large-area substrates (e.g., Gen 10.5 display panels) using spatially resolved fiber-optic coupling configurations
• Process qualification and recipe transfer between tool sets, supported by spectral library matching and inter-tool calibration correlation reports

FAQ

Does the Quantus HP100 require external vacuum pumping to operate?

No—its optical path and detector housing are engineered for pressure stability from 1 Torr to 760 Torr. No backing pump, turbomolecular pump, or pressure isolation stage is necessary.
Can it distinguish between isotopes or vibrationally excited states?

Not inherently—the system resolves atomic and diatomic electronic transitions with ~0.15 nm optical resolution (FWHM). Isotopic shifts (e.g., ¹⁴N vs. ¹⁵N) fall below this limit; rotational/vibrational bands require FTIR or laser absorption techniques.
Is calibration traceable to NIST standards?

Yes—wavelength calibration uses Hg/Ne/Ar lamp references traceable to NIST SRM 2034. Intensity calibration is performed using certified tungsten halogen sources per ISO/IEC 17025-accredited procedures.
What maintenance intervals are recommended?

Optical window inspection every 6 months; plasma probe electrode replacement only after ≥5,000 operating hours or visible erosion—typical mean time between failures exceeds 18 months under standard semiconductor fab conditions.