transistor aging niranjan soundararajan. aging timeline clock period fails!! start of lifetime
Post on 16-Jan-2016
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Transistor Aging
Niranjan Soundararajan
Aging
TimelineClock period
Fails!!
Start of lifetime
Transistors do age… like humans
• Transistors slow down over time
• Rate of aging very related to stress
• Similarities exist in the cause and effect of aging
Mortality rate comparison
Process Variation - Systematic: You are as good as your friends
Different Aging Phenomena• NBTI– Transistor holds same data for long periods– “All work and no play”
• HCE– Related to amount of switching– Moving back and forth between jobs
• Oxide Breakdown– Breakdown of gate-oxide between semi-conductors
slowly over time• Electro-Migration– Electron flow in same direction– Blood flow
Decreasing aging effects• Stress reduction mechanisms
– Meditation – Decrease temperature for transistors– Load-balancing
• Facelift – “Transistor Aging” related paper
• Defect tolerance
• Monitoring– Health periodically– Sensors on-chip to identify stressed transistors
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