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Unformatted text preview: a donor or an acceptor. E D and E A levels both exist for the Au and both are close to the middle of the silicon bandgap. If a small concentration of Au is placed in an N-type silicon crystal, will the Au behave as a donor or acceptor? Explain 5. A silicon diode has doping concentrations on the N and P sides of N D =1x10 19 cm-3 and of N A =1x10 15 cm-3 . Calculate the process temperature at which the two sides of the diode becomes intrinsic. 6. A piece if N-type Silicon has a donor level E D =.01eV. Assuming there are no other impurities in the crystal, what is the position of the Fermi level at absolute zero?...
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- Fall '07