Stress Exposure
Environmental stress testing evaluates long-term solid-state diffusion, intermetallic growth and packaging degradation under elevated ambient thermal conditions without electrical bias applied. Subjecting integrated sensors to high temperature storage accelerates thermal activation mechanisms governing contact resistance increase and dielectric breakdown. Boundary limits exclude electrical stress effects, as devices remain unpowered throughout test duration.
Degradation Dynamic
Chemical reaction rates and atomic diffusion in semiconductor structures accelerate according to Arrhenius kinetics during thermal exposure. Exposing components to high temperature storage at one hundred fifty degrees Celsius for one thousand hours simulates multi-year operational aging at room temperature. Intermetallic compound growth at wire bond interfaces increases contact resistance and induces mechanical embrittlement.
Polymeric encapsulants experience post-cure shrinkage and outgassing, altering internal mechanical stress on sensitive transducer elements. Pre-test and post-test parameter evaluations record zero-point shifts, sensitivity changes and leakage currents to assess package stability.
Parameter Drift
Parametric shifting during thermal exposure highlights instability in thin-film resistors and sensor bridge elements. Deviation limits established by reliability standards determine pass or fail status following post-exposure room temperature stabilization.
Qualification Protocol
Standardized testing procedures conform to JESD22-A103 specifications for semiconductor device reliability. Test chambers maintain uniform temperatures within two degrees Celsius across all loading shelves. Recovery period requirements mandate twenty-four hours of room temperature stabilization before final metrological measurement.
