hw1_f10_sol - ECE 440 Homework 1 Solution Fall 2010 1...

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ECE 440 Homework 1 Solution Fall 2010 1. Answer the following questions as concisely as possible. (a) Name (i) one elemental semiconductor and (ii) one - compound semiconductor. (b) What is the difference between a crystalline and a polycrystalline material? (c) How many atoms are there in a simple cubic unit cell? in a bcc unit cell? In a fcc unit cell? in the unit cell characterizing the diamond lattice? (d) 1Å =? cm (e) In terms of the lattice constant a , what is the distance between nearest-neighbor atoms in a simple cubic lattice? (f) How many nearest-neighbor atoms are there in the diamond and the zincblende lattices? Sol) (a) (i) Si or Ge, (ii) AlP, AlAs, AlSb, GaN, GaPl, GaAs, GaSb, InP, InAs, or InSb (b) Crystalline material has the same atomic pattern or order throughout the material, while polycrystalline material has crystalline subsections that are misaligned with respect to each other.
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hw1_f10_sol - ECE 440 Homework 1 Solution Fall 2010 1...

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