OK-HAST Series High-Pressure Accelerated Stress Test Chamber
| Brand | OK |
|---|---|
| Origin | Imported |
| Manufacturer Type | Authorized Distributor |
| Price | USD 13,500 (FOB) |
| Internal Dimensions (D×H) | Φ250×300 mm to Φ650×600 mm |
| External Dimensions (W×H×D) | 500×500×700 mm to 950×900×1100 mm |
| Operating Temperature Range | 105–135 °C (143 °C optional) |
| Relative Humidity Range | 70–100 % RH |
| Steam Pressure Range | 0–2.0 kg/cm² (gauge) above ambient (3.0 kg/cm² optional) |
| Power Supply | AC 220 V / 380 V, 50/60 Hz |
| Safety Features | Dual overheat protection, door interlock, pressure relief valve, low-water cutoff, automatic steam purging, auto-refill system |
Overview
The OK-HAST Series High-Pressure Accelerated Stress Test Chamber is an engineered environmental stress screening (ESS) system designed for reliability validation of microelectronic components and assemblies under elevated temperature, humidity, and pressure conditions. Based on the physics of moisture diffusion and electrochemical migration under accelerated vapor pressure, the chamber replicates years of field-level degradation in hours—enabling rapid identification of latent defects such as wire bond corrosion, solder joint delamination, mold compound blistering, and intermetallic growth in IC packages, LED modules, PCBs, photovoltaic cells, and permanent magnets. Unlike standard humidity chambers, the OK-HAST operates above atmospheric boiling point by maintaining saturated steam at controlled gauge pressures (up to 2.0 kg/cm²), thereby achieving significantly higher effective saturation vapor pressure and driving moisture deeper into package interfaces per ASTM E1014, JESD22-A102 (HAST), and JEDEC JEP172 guidelines. Its robust stainless-steel interior, polished surface finish, and fully sealed silicon gasketed door ensure long-term corrosion resistance and repeatable test integrity across thousands of thermal-steam cycles.
Key Features
- Automated water replenishment system with real-time level monitoring—prevents dry-run operation and maintains consistent steam generation throughout extended test durations.
- Digital LED temperature controller with ±0.5 °C accuracy and programmable ramp-soak profiles; supports user-defined setpoints from 105 °C to 135 °C (143 °C variant available upon request).
- Precision digital timer activated only after chamber reaches target temperature—ensuring accurate exposure duration compliance per test standards.
- Integrated pressure/temperature gauge with dual-scale analog readout (kg/cm² and °C) for continuous verification of thermodynamic equilibrium inside the test cavity.
- Forced-convection steam circulation via corrosion-resistant blower—guarantees uniform vapor distribution and eliminates cold spots per IEC 60068-2-66 requirements.
- One-piece molded silicone door seal with compression-fit design—provides >10,000-cycle durability and leak rate <1.0 × 10⁻⁶ mbar·L/s (He test verified).
- Interlocked safety architecture: motorized door latch prevents chamber pressurization unless fully closed and sealed; independent mechanical pressure relief valve activates at 2.2 kg/cm² (±0.1 kg/cm² tolerance).
- Dual-stage overheat protection: primary thermostat cuts heating at 150 °C; secondary thermal fuse interrupts power at 165 °C—both trigger audible alarm and visual fault indication.
- ABS-insulated door handle and perimeter guard—meets EN 61000-6-2 EMC and EN 61000-6-4 emission limits for operator safety in shared lab environments.
Sample Compatibility & Compliance
The OK-HAST accommodates diverse sample geometries—from bare die trays and wafer carriers to assembled PCBs up to 650 mm diameter. Standard stainless-steel shelves (2 included) support load capacities up to 20 kg per shelf. The chamber complies with international qualification testing protocols including JEDEC JESD22-A102D (Unbiased HAST), JESD22-A110E (Biased HAST), MIL-STD-883 Method 1030.8, and AEC-Q200 stress requirements for automotive electronics. All control logic and data logging functions are architected to support GLP/GMP audit readiness: event timestamps, parameter change logs, and alarm histories are stored internally with non-volatile memory retention (>10 years). Optional RS-485 Modbus RTU or Ethernet TCP/IP interface enables integration into centralized MES or LIMS platforms compliant with FDA 21 CFR Part 11 electronic record controls.
Software & Data Management
The embedded controller firmware includes a built-in data logger capable of recording temperature, pressure, and elapsed time at user-selectable intervals (1–60 seconds). Logged data exports via USB flash drive in CSV format compatible with Excel, MATLAB, and JMP statistical analysis tools. Optional PC-based software (OK-DataLink v3.2) provides real-time remote monitoring, multi-chamber synchronization, automated report generation (PDF/Excel), and deviation alerting via email/SNMP trap. All software modules undergo annual NIST-traceable calibration verification and include full revision history, source code documentation, and cybersecurity hardening per IEC 62443-3-3 SL2 requirements.
Applications
- Qualification of plastic-encapsulated microcircuits (PEMs) per MIL-PRF-38535 Class K/Q screening.
- Failure mode analysis of GaN and SiC power modules under high-humidity bias stress.
- Reliability assessment of flexible printed circuits (FPCs) used in wearables and medical devices.
- Process validation for conformal coating adhesion and moisture barrier performance.
- Accelerated life testing of NdFeB sintered magnets exposed to coastal/humid operational environments.
- Pre-release burn-in for EV battery management system (BMS) controllers operating in IP67 enclosures.
FAQ
What is the maximum allowable test duration per cycle?
Standard operation supports continuous runs up to 96 hours; extended 168-hour cycles require optional high-capacity water reservoir (kit #HAST-WR30L) and enhanced cooling fan assembly.
Can the chamber be configured for biased-HAST testing?
Yes—via external DC power feedthrough ports (optional accessory kit #HAST-BIAS-KIT) supporting up to ±30 V / 5 A with isolated ground reference.
Is third-party calibration certification available?
Factory calibration includes NIST-traceable certificates for temperature (PT100 sensor) and pressure (piezoresistive transducer); ISO/IEC 17025 accredited calibration services are offered through authorized regional partners.
How is steam purity maintained during prolonged operation?
An integrated steam purge cycle automatically vents non-saturated vapor before each test phase, ensuring >99.5 % saturated steam quality per ASME PTC 19.3TW specifications.
Does the system meet CE marking requirements for EU deployment?
Yes—certified to EN 61000-6-2 (immunity), EN 61000-6-4 (emissions), EN 61010-1 (safety), and RoHS 2011/65/EU directives; Declaration of Conformity supplied with shipment.
