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ECE 695A Lecture 12R: Review Questions
08 Feb 2013 | | Contributor(s):: Muhammad Alam
Review Questions:Explain the difference between local field and global field within an oxide. Explain physically why electric field decreases bond strength.How does the dissociation process becomes non-Arrhenius?Do you think the diffusion and repassivation will also become non-Arrhenius when...
ECE 595E Lecture 12: Applications of FFT
08 Feb 2013 | | Contributor(s):: Peter Bermel
Outline:Recap from FridayReal FFTsMultidimensional FFTsApplications:Correlation measurementsFilter diagonalization method
ECE 595E Lecture 11: Fast Fourier Transforms
Outline:Recap from WednesdayFourier AnalysisScalings and SymmetriesSampling TheoremDiscrete Fourier TransformsNaïve approachDanielson-Lanczos lemmaCooley-Tukey algorithmExamples
ECE 695A Lecture 9R: Review Questions
Review Questions:Does NBTI power-exponent depend on voltage or temperature?Do you expect the NBTI power-exponent to be larger or smaller if trapping is important?How does one know that the diffusing species is neutral?How would the time-exponent different for a surround gate MOSFET vs. planar...
ECE 695A Lecture 11: Temperature Dependence of NBTI
07 Feb 2013 | | Contributor(s):: Muhammad Alam
Outline:Review: Temperature activation & NBTITemperature dependent forward/reverse ratesTemperature dependence of diffusion coefficientMaterial dependence of activation energyConclusion
ECE 695A Lecture 10: NBTI Time Dependence -- Frequency and Duty Cycle Dependencies
06 Feb 2013 | | Contributor(s):: Muhammad Alam
Outline:NBTI stress and relaxation by R-D modelFrequency independence and lifetime projectionDuty cycle dependenceThe magic of measurementConclusions
ECE 695A Lecture 9: NBTI Time Dependence -- Stress Phase
Outline:Background: Time-dependent degradationThe Reaction-Diffusion modelApproximate solution to R-D model in stress phaseDegradation free transistorsConclusions
ECE 595E Lecture 9: Programming for Linear Algebra
01 Feb 2013 | | Contributor(s):: Peter Bermel
Outline:Recap from FridayApplication ExamplesElectrostatic potential (Poisson’s equation)1D array of charge2D grid of chargeArrays of interacting spins1D interaction along a chain2D nearest-neighbor coupling
ECE 595E Lecture 10: Solving Quantum Wavefunctions
Outline:Recap from MondaySchrodinger’s equationInfinite & Finite Quantum WellsKronig-Penney modelNumerical solutions:Real spaceFourier space
ECE 695A Lecture 6: Defects in the Bulk and at Interfaces
01 Feb 2013 | | Contributor(s):: Muhammad Alam
Outline:Strain in materials/origin of defectsExamples: bulk defectsExamples: interface defectsMeasurementsConclusions
ECE 695A Lecture 8: Phenomenological Observations for NBTI
Outline:Qualitative observationsTime, voltage, temperature dependenciesMaterial dependenceCircuit implications
ECE 695A Lecture 8R: Review Questions
What is the distinction between BTI and NBTI phenomena?What does it mean that a process is thermally activated?What is the difference between parametric failure and catastrophic failure? Give examples. What are the time-characteristics of trapping, BTI, and NBTI?Which device will have poorer...
ECE 695A Lecture 5: Amorphous Material/Interfaces
29 Jan 2013 | | Contributor(s):: Muhammad Alam
Outline:Amorphous vs. crystalline materialsDefect-free amorphous materialOrigin of defects (Maxwell’s relation)Conclusions
ECE 595E Lecture 8: Eigenvalues
29 Jan 2013 | | Contributor(s):: Peter Bermel
Outline:Recap from WednesdayEigenproblem Solution TechniquesPower MethodsInverse IterationAtomic TransformationsFactorization Methods
ECE 595E Lecture 7: Optimization and Eigenvalues
ECE 595E Lecture 6: Finding Special Values
Outline:Recap from WednesdayRoot FindingBisectionNewton-Raphson methodBrent’s methodOptimizationGolden Section SearchBrent’s MethodDownhill SimplexConjugate gradient methodsMultiple level, single linkage (MLSL)
ECE 695A Lecture 7: Trapping in Pre-existing Traps
Outline:Pre-existing vs. stress-induced trapsVoltage-shift in pre-existing bulk/interface trapsRandom Telegraph Noise, 1/f noiseConclusion
ECE 695A Lecture 7A: Appendix - Theory of Stochastic Distribution
Supplemental information for Lecture 7: Trapping in Pre-existing Traps
ECE 695A Lecture 7R: Review Questions
Review Questions:Why are there more types of defects in crystals than in amorphous material?From the perspective of Maxwell’s relation, how does H reduce defect density?Why is HfO2 so defective --- and why do you want to use it?Which type of traps involve faster trapping/detrapping, Pb center or...
ECE 595E Lecture 5: Linear Algebra
18 Jan 2013 | | Contributor(s):: Peter Bermel
Outline:Recap from MondayOverview: Computational Linear AlgebraGaussian EliminationLU DecompositionSingular Value DecompositionSparse MatricesQR Decomposition