HOGON HG-CuOnline Total Copper Online Analyzer for Etching Baths
| Brand | HOGON |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | OEM Manufacturer |
| Product Category | Domestic |
| Model | HG-CuOnline |
| Pricing | Upon Request |
| Output Signals | Modbus TCP, RS-232/485, CAN, 4–20 mA |
| Operating Environment | ≤90% RH, 10 °C (non-condensing) |
| Resolution | Potentiometric: 0.1 mV (−2000 to +2000 mV) |
| pH | ±0.001 pH (0–20 pH) |
| Photometric | 0.003 Abs (0–1 Abs) |
| Ingress Protection | IP55/IP65 (when door is closed and latched) |
| Titration Accuracy | ±1 µL (using 20 mL burette) |
Overview
The HOGON HG-CuOnline Total Copper Online Analyzer is an industrial-grade potentiometric titration system engineered for continuous, real-time quantification of total dissolved copper in acidic etchant baths used in printed circuit board (PCB) fabrication and semiconductor wafer processing. It operates on the principle of selective complexometric titration with ethylenediaminetetraacetic acid disodium salt (EDTA), where Cu²⁺ ions form a stable 1:1 chelate complex under controlled pH conditions (typically pH 8.5, maintained via ammoniacal buffer). Endpoint detection is achieved through high-resolution potentiometric monitoring using a copper-selective ion electrode—ensuring robustness against common interferents such as Fe³⁺, Ni²⁺, and Sn²⁺ when combined with appropriate masking agents (e.g., thiourea). Unlike spectrophotometric or ICP-based alternatives, this analyzer delivers trace-level accuracy without requiring sample digestion, dilution beyond process-relevant ranges, or laboratory-grade infrastructure—making it uniquely suited for integration into closed-loop process control architectures.
Key Features
- Automated in-line sampling and reagent delivery with programmable cycle intervals (default: 25 minutes per analysis)
- Dual-stage precision dosing: 20 mL calibrated burette with ±1 µL volumetric resolution for EDTA titrant delivery
- Copper-selective solid-state ion-selective electrode (ISE) with integrated temperature compensation (PT1000)
- Onboard reagent management: three independent reagent reservoirs (EDTA standard, ammoniacal buffer, thiourea masking agent) with level sensing and low-volume alarms
- Modular wet-end design compliant with ISO 8502-3 for corrosion-resistant fluid path components (PP, PTFE, FKM seals)
- Embedded microcontroller with dual watchdog timers and hardware-based fault detection for unattended operation
Sample Compatibility & Compliance
The HG-CuOnline is validated for direct analysis of spent acidic etchants—including ammoniacal (NH₃/NH₄Cl), cupric chloride (CuCl₂/HCl), and alkaline persulfate-based formulations—without pre-filtration or offline pretreatment. Sample matrix tolerance covers total copper concentrations from 10 to 120 g/L, with linear response across the full range (R² ≥ 0.9998, NIST-traceable calibration). The system conforms to ASTM D1093–22 (Standard Test Method for Copper in Industrial Water by Titration) and supports GLP/GMP data integrity requirements through built-in audit trail logging (user actions, calibration events, reagent lot tracking). All electrical interfaces meet IEC 61000-6-2 (EMC immunity) and IEC 61000-6-4 (EMC emission) standards; analog outputs comply with NAMUR NE43 for 4–20 mA signal health diagnostics.
Software & Data Management
The embedded firmware supports both local HMI operation (7-inch resistive touchscreen, IP65-rated) and remote configuration via Ethernet (Modbus TCP slave mode). Data logging records raw electrode potential, titrant volume, calculated Cu concentration (mg/L or g/L), timestamp, and QC flags at every analysis cycle—with onboard storage for ≥12 months of compressed time-series data. Export options include CSV over USB or scheduled FTP push to MES/SCADA systems. For regulated environments, optional firmware upgrade enables 21 CFR Part 11 compliance: electronic signatures, role-based access control (admin/operator/auditor), and immutable audit trails with SHA-256 hash verification. Calibration history and drift reports are auto-generated per ISO/IEC 17025 Annex A.3 requirements.
Applications
Primary deployment targets include inline monitoring of copper etch baths in PCB multilayer fabrication lines, advanced packaging substrate production, and IC interconnect patterning processes. Secondary use cases span electroplating bath replenishment control, wastewater treatment influent characterization (prior to Cu recovery units), and R&D validation of novel etchant chemistries. Field deployments demonstrate <±0.8% RSD repeatability over 30-day continuous operation in Class 1000 cleanroom-adjacent environments (ISO 14644-1), with mean time between maintenance (MTBM) exceeding 6,500 hours. Integration with Siemens PCS7, Rockwell FactoryTalk, or Yokogawa CENTUM VP is supported via certified device drivers.
FAQ
What sample volume is required per analysis?
10 mL of undiluted etchant is drawn directly from the process loop; no manual dilution is needed—the system performs all necessary conditioning internally.
Can the analyzer handle highly turbid or particulate-laden etchants?
Yes—integrated 50 µm sintered stainless-steel inlet filters and pulse-flush cleaning cycles prevent clogging; optional ultrasonic probe agitation is available for high-solids slurries.
How often must reagents be replaced?
EDTA standard solution (0.1 mol/L) requires replacement every 90 days under continuous operation; buffer and masking agents last ≥180 days—system alerts trigger at 10% remaining volume.
Is method validation documentation provided?
Yes—each unit ships with a Certificate of Conformance, factory calibration report (NIST-traceable Cu standards), and a method validation dossier covering specificity, linearity, LOD/LOQ, and ruggedness per ICH Q2(R2).
Does the system support remote diagnostics?
Yes—via secure TLS-encrypted web interface; diagnostic logs include real-time electrode impedance, pump current draw, and thermal stability metrics for predictive maintenance.
