1. Introduction - Laboratory for Reliable Computing

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Scope of Testing• Engineering Test− Diagnostic Test∗ Fault location∗ Failure analysis∗ Design and/or process debugging• Manufacturing Test− Characterization Test∗ Performance characterization: parametric test∗ Reliability characterization: bathtub curve (aging)− Production Test∗ Simple parametric test∗ Functional test∗ Reliability screening (burn-in)m01intro7.02 Cheng-Wen Wu, NTHU 10
Fault• Fault: a physical defect in a circuit/system− Permanent fault: a fault that is continuous and stable, whosenature do not change before, during, and after testing∗ Affecting the functional behavior of the system permanently∗ A.k.a. hard fault or solid fault∗ Usually quite localized∗ Can be modeled− Temporary fault: a fault that is present only part of the time,occurring at random moments and affecting the system forfinite, but unknown, intervals of time∗ Transient fault: caused by environmental conditions∗ No well-defined fault model∗ Called soft error in RAM∗ Often assumed no permanent damage was done− Intermittent fault: caused by non-environmental conditions∗ Often repeatable∗ Can use permanent fault models and repeated test with stressm01intro7.02 Cheng-Wen Wu, NTHU 11
Page 2 and 3: • IntroductionOutline• RAM func
Page 4 and 5: • Scope of testingOutline• Defe
Page 6 and 7: • Economics!− Product quality
Page 8 and 9: Test Cost9080706050403020100Test co
Page 12 and 13: Fault Model and Error• Fault mode
Page 14 and 15: Testing and Fault Coverage• Testi
Page 16 and 17: Defect Level and Fault CoverageRequ
Page 18 and 19: Logic Fault Modeling: Stuck-at Faul
Page 20 and 21: Fault Diagnosis• Fault detection:
Page 22 and 23: Design for Testability (DFT)• A f
Page 24 and 25: MUX ScanxCombinationalLogicCTSIM D
Page 26 and 27: Scan-Based PS-BIST with Test Points
Page 28 and 29: Embedded Memory Testing• Embedded
Page 30: Off-Line Testing of RAM• Parametr

1. Introduction - Laboratory for Reliable Computing

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