Reliability Procedure
Stress testing process designed to eliminate early life failures in electronic devices. The burn in screening involves operating components at elevated voltages and temperatures for a fixed duration. This identifies latent defects that would otherwise appear as infant mortality in the field.
Thermal Stress
Heat acceleration forces weak components to fail before they are integrated into larger systems. During burn in screening, the devices are placed in environmental chambers that simulate harsh operating conditions. The junction temperature is monitored to ensure it stays below the damage threshold.
This process separates stable parts from those with manufacturing flaws.
Failure Analysis
Statistical tracking of fallout rates provides data for process improvement. The burn in screening results are used to adjust manufacturing parameters when high mortality rates are detected. If a batch shows excessive failures, the entire lot may be quarantined for further investigation.
This feedback loop improves the long term reliability of the product line.
Economic Optimization
Test duration and stress levels are balanced against the cost of the procedure. Effective burn in screening targets the peak of the bathtub curve where the failure rate is highest. As the process matures, the time spent in the oven may be reduced to save energy and throughput.
Final inspection confirms that only the surviving components reach the customer.
