Yibin Zhang, Diganta Das, Asaf Katz and Michael Pecht
CALCE Electronics Products and Systems Center,
University of Maryland
College Park, MD
Ericsson Telecom AB,
Time-to-failure of semiconductor components has doubled every 15 months since 1973, leading to a notable increase in effective activation energy. This suggests it is no longer justifiable to regard activation energy as a stable physical constant. Recent data also show the acceleration factor used for test-to field analysis is doubling every five years. Taking these trends into account in testing strategies will improve reliability while reducing accelerated life testing times and expense.
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