ENGRI111_HW1 - semiconductors are extrinsic at sufficiently...

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ENGRI 111 Homework #1 Due Wednesday, September 8 1. Using the "chemist's approach" of electrons in covalent bonds, explain how the substitution of a small amount of aluminum increases the conductivity of silicon. 2. Using the same model, explain how the addition of antimony increases the conductivity. 3. 4. Distinguish between an intrinsic and an extrinsic semiconductor. (b) Explain why all real
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Unformatted text preview: semiconductors are extrinsic at sufficiently low temperature and intrinsic at sufficiently high temperature. 5. Design a metal oxide field effect transistor with an n-type source and drain in a p-type wafer. What else is needed for the device to be operational? Explain how the transistor works....
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