Long-term reliability testing methods
Long-term reliability is validated through accelerated life testing that replicates field stresses. Common methods include thermal cycling, humidity with bias (HAST), power cycling, salt spray for corrosive environments, and extended SIR runs.
Combine electrical monitoring with chemical analysis before and after tests to understand failure progression. ZESTRON provides customized reliability test programs for product families and regulatory needs.
Types of long-term testing methods
Typical tests:
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thermal cycling to stress mechanical and solder joints
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humidity and bias tests to accelerate electrochemical migration
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HAST for aggressive humidity and temperature
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salt fog for marine or roadside exposure
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extended SIR and power-on soak for leakage trends
Each test targets different failure drivers and helps set manufacturing acceptance criteria.
Importance of reliability testing
Reliability testing:
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predicts field life and identifies latent defects
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validates cleaning and coating processes under stress
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informs warranty and maintenance planning
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ensures compliance with safety-critical industry requirements
ZESTRON integrates chemical and electrical testing for comprehensive reliability assessment.