lecture20 - Lecture 19 Wednesday March 9 EE 332...

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Unformatted text preview: Lecture 19 Wednesday March 9 EE 332 Semiconductor Devices Problem Assignment Monday 6.13 Wednesday 3-problems listed below Friday Practice Exam and Review Questions 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? 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? Review Questions 6. In a p + n diode, how is the junction capacitance affected by increasing N a ? 7. What is the primary cause in the turn-off delay in junction devices? 8. In an abrupt junction p + n diode, do the majority or minority carriers account for most of the conduction? Review Questions 9. In a p + n diode, how is the junction capacitance affected by increasing N d ? 10. Name one manufacturing technique used to change the doping concentration in a semiconductor....
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This note was uploaded on 06/30/2010 for the course EECE 332 taught by Professor Constable during the Spring '08 term at Binghamton University.

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lecture20 - Lecture 19 Wednesday March 9 EE 332...

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