lecture21 - Lecture 21 Wednesday March 14 EE 332...

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Lecture 21 Wednesday March 14 EE 332 Semiconductor Devices Second exam Wednesday March 16. You may bring one sheet of paper with notes on both sides. Exam covers section 3.10, chapters 4, 5, and appendix C. Review Questions 1. Give the condition that is necessary to make an ohmic contact to a p-type semiconductor. 2. In forward bias, the diode current initially increases proportional to e qV/nkT . What is the constant n called? 3. What is the name given to the time period after a diode is reversed biased before the current begins to decrease? φ m > φ s Ideality Factor Storage delay time Review Questions 4. When the forward bias on a p-n junction is increased, which increases more rapidly in the junction region the drift current or the diffusion current? 5. What is the name given to a p-n junction made with two lattice-matched semiconductor having different band gaps? diffusion current Heterojunction Review Questions 6. In a p + n diode, how is the junction capacitance affected by increasing N
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lecture21 - Lecture 21 Wednesday March 14 EE 332...

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