Highly Accelerated Stress Test – HAST
A Highly Accelerated Stress Test (HAST), which combines high temperature, high humidity, pressure, and time to assess a component's dependability in challenging conditions, is an essential component of environmental testing. The pressure cooker test (PCT) or unsaturated pressure cooker test (USPCT) are other names for HAST. For customers in the USA and other countries, Infinita Lab offers the best HAST.
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- Overview
- Scope, Applications, and Benefits
- Test Process
- Specifications
- Instrumentation
- Results and Deliverables
Highly Accelerated Stress Test (HAST) Overview
Highly Accelerated Stress Test (HAST) is a reliability testing method used to evaluate materials and electronic components under extreme conditions of temperature, humidity, and pressure. It accelerates moisture-induced degradation to identify potential failure mechanisms in a significantly reduced timeframe.
HAST simulates long-term environmental exposure by subjecting samples to conditions such as 110–130°C temperature, ~85% relative humidity, and elevated pressure, enabling rapid detection of corrosion, insulation failure, and material degradation.
Scope, Applications, and Benefits
Scope
HAST testing evaluates:
- Moisture ingress and diffusion behavior
- Corrosion and oxidation mechanisms
- Insulation degradation and leakage
- Reliability under high temperature–humidity stress
Applications
- Semiconductor devices and IC packages
- Printed circuit boards (PCBs)
- Automotive electronics
- Aerospace electronic systems
- High-reliability components
Benefits
- Accelerates reliability testing (96–264 hours vs ~1000 hours THB)
- Identifies failure modes early
- Reduces product development time
- Improves durability in harsh environments
- Enables faster validation of design changes
HAST Test Process
Sample Preparation
Samples (typically ≥25 units per lot) are cleaned and mounted for uniform exposure.
1Stress Application
Samples are exposed to 110–130°C, ~85% RH, and pressure up to ~2–4 atm.
2Monitoring
Electrical parameters (leakage, resistance) and physical changes are monitored.
3Data Analysis
Failure rates and degradation mechanisms are evaluated post-test.
4HAST Technical Specifications
| Parameter | Details |
|---|---|
| Standard | JESD22-A110, JESD22-A118, IEC 60068-2-66 |
| Test Principle | Accelerated aging under high temp, humidity, pressure |
| Temperature Range | 110°C, 120°C, 130°C |
| Humidity | ~85% RH (unsaturated), 100% RH (saturated) |
| Pressure | Up to ~2–4 atm |
| Duration | 24, 48, 96, 168, 264 hours |
| Duration | Typically ≥25 units |
Instrumentation Used for Testing
- HAST chamber (pressure-controlled)
- Temperature and humidity control system
- Pressure regulation system
- Electrical monitoring system
- Data acquisition system
- Sample fixtures
Results and Deliverables
- Failure rate and reliability performance data
- Leakage current and insulation resistance changes
- Corrosion and physical degradation observations
- Comparative performance under accelerated conditions
- Input for design improvement and material selection
- Test report
Partnering with Infinita Lab for Optimal Results
Infinita Lab addresses the most frustrating pain points in the HAST testing process: complexity, coordination, and confidentiality. Our platform is built for secure, simplified support, allowing engineering and R&D teams to focus on what matters most: innovation. From kickoff to final report, we orchestrate every detail—fast, seamlessly, and behind the scenes.
Looking for a trusted partner to achieve your research goals? Schedule a meeting with us, send us a request, or call us at (888) 878-3090 to learn more about our services and how we can support you. Request a Quote
Frequently Asked Questions
HAST testing evaluates the reliability of materials and electronic components under accelerated temperature and humidity conditions. It helps identify potential failure mechanisms and ensures long-term performance in harsh environments.
Typical conditions include temperatures between 110–130°C, relative humidity around 85%, and elevated pressure. These conditions accelerate moisture-related degradation and reduce overall testing time.
HAST can detect corrosion, insulation breakdown, delamination, and electrical leakage. These failure modes are critical for evaluating long-term reliability in electronic components.
HAST uses higher temperature and pressure than standard humidity tests, significantly reducing test duration while maintaining similar failure mechanisms.
HAST ensures electronic components can withstand harsh environmental conditions, reducing the risk of premature failure and improving product reliability in real-world applications.
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