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What happens if a P-type wafer touches an N-type?

  1. Dec 5, 2014 #1
    I am attempting to build a transistor. If a n-type silicon wafer makes physical contact with a p-type wafer, will the extra electrons found in the N-type discharge to the p-type instantly? Is physical contact the requisite for interaction between two doped silicon peices? Or is there an intermediary substance required to induce a reaction?
  2. jcsd
  3. Dec 5, 2014 #2


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    Science Advisor

    A depletion zone forms and you get a diode.
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