OK-PTC Series High-Pressure Accelerated Aging Test Chamber

Overview

The OK-PTC Series High-Pressure Accelerated Aging Test Chamber is a precision-engineered environmental stress testing system designed for accelerated reliability evaluation of electronic components, printed circuit boards (PCBs), conformal coatings, encapsulants, and moisture-sensitive packaging materials under combined high-temperature, high-humidity, and elevated-pressure conditions. Operating on the principle of saturated steam pressurization, the chamber generates a controlled 100% relative humidity environment at pressures up to 2.8 kg/cm² (gauge), corresponding to an absolute pressure of ~3.8 bar—a condition that significantly accelerates moisture diffusion into polymeric and laminated structures beyond standard 85°C/85% RH testing. This enables rapid identification of latent failure mechanisms such as intermetallic growth, conductive anodic filament (CAF) formation, solder joint degradation, and delamination—critical for qualification per JEDEC JESD22-A102 (HAST) and A110 (uHAST) protocols.

Key Features

• Two standard configurations: OK-PTC-25 (Ø250 × 450 mm internal volume) and OK-PTC-35 (Ø350 × 500 mm), optimized for sample throughput and thermal mass stability
• PID-controlled saturated steam generation with SSR-driven heating elements and Pt100 platinum resistance temperature sensors ensuring ±0.5°C control accuracy and 0.1°C resolution
• Dual-stage pressure regulation system with real-time analog pressure transducer feedback and automatic safety venting logic
• Horizontal cylindrical chamber design minimizes condensation accumulation and eliminates direct steam jet exposure to operators during loading/unloading
• Integrated vacuum-assisted air purge cycle prior to test initiation ensures removal of ambient oxygen and particulates, supporting clean-environment aging per ISO 9022-14
• Robust mechanical interlock system: door remains pneumatically locked until internal pressure drops below 0.1 kg/cm², with redundant pressure and temperature fault detection
• Self-sustaining water supply—standard configuration supports continuous operation for ≥100 hours without manual refilling; optional fully automated replenishment module available

Sample Compatibility & Compliance

The OK-PTC chamber accommodates diverse sample geometries—including bare dies, QFN/QFP packages, BGA assemblies, wafer-level substrates, and multi-layer flex circuits—within its uniformly heated, rotationally symmetric cavity. Its construction adheres to IEC 61000-4-27 and UL 61010-1 for electrical safety, while operational parameters align with internationally recognized accelerated stress standards: ASTM D2247 (coating durability), IEC 60068-2-52 (cyclic salt mist + humidity), MIL-STD-810H Method 507.6 (high-pressure humidity), and NACE TM0177 (sulfide stress cracking). The system’s ability to maintain stable 100% RH at temperatures exceeding 100°C under pressure satisfies the stringent requirements of JEDEC JESD22-A110 (unbiased HAST), making it suitable for qualification testing in automotive electronics (AEC-Q200), aerospace avionics, and medical device PCB manufacturing where long-term field reliability must be validated within compressed timelines.

Software & Data Management

Equipped with a dedicated LED-based controller featuring dual-channel real-time logging of temperature, pressure, and elapsed time, the OK-PTC provides traceable, timestamped data output via RS-485 interface compatible with Modbus RTU protocol. Optional PC-based software enables remote monitoring, configurable alarm thresholds (e.g., deviation >±1.0°C or pressure drift >0.1 kg/cm²), and export of CSV-formatted reports compliant with GLP documentation requirements. All system events—including door lock status, pressure ramp completion, vacuum purge cycles, and emergency shutdown triggers—are recorded with audit trail capability. For regulated environments, the controller supports 21 CFR Part 11-compliant user access levels (operator, supervisor, administrator) when integrated with validated third-party LIMS or MES platforms.

Applications

• Qualification and screening of moisture-sensitive devices (MSL Level 3–6) per IPC/JEDEC J-STD-020
• Evaluation of conformal coating integrity and adhesion under thermal-mechanical stress
• Accelerated corrosion testing of metallic contacts and solder finishes (SnPb, SAC305, ENIG)
• Reliability assessment of MEMS packaging seals and hermeticity barriers
• Validation of adhesive bond strength in stacked-die and fan-out wafer-level packaging
• Material compatibility studies for encapsulants, underfills, and mold compounds exposed to humid high-pressure environments

FAQ

What is the maximum allowable test duration without manual intervention?
Standard configuration supports uninterrupted operation for ≥100 hours using the built-in water reservoir; extended runtime requires optional auto-refill system integration.
Does the chamber support unbiased HAST (uHAST) testing per JEDEC JESD22-A110?
Yes—the OK-PTC achieves and maintains 130°C/100% RH at 2.6–2.8 kg/cm² gauge pressure, satisfying uHAST Class 1A and 1B conditions.
How is temperature uniformity verified across the working volume?
Calibration is performed using NIST-traceable multi-point PT100 probes placed at nine defined locations (center, corners, mid-height) per IEC 60068-3-5, confirming ±1.5°C spatial deviation.
Can the vacuum pre-purge function be disabled or customized?
Yes—vacuum cycle duration, final pressure setpoint (down to 10 mbar abs), and post-purge dry-air flow rate are programmable via controller menu.
Is third-party calibration certification available?
Factory calibration includes full temperature/pressure mapping report; ISO/IEC 17025-accredited calibration services are offered through authorized metrology partners upon request.