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Vacuum tubes to semiconductors to ?

  1. Aug 15, 2011 #1


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    This is something that has popped into my head recently.

    afaik, vacuum tubes were once the most common device used for switching, and amplifying.
    Then transistors and other semiconductor devices come along and almost wiped out vacuum tubes (not totally i think)

    what I want to ask is:

    is there any signs of replacements for semiconductors in the near future? I mean the size of transistors in cpu's seems to be approaching theoretical limit (tunnelling start to be significant for example), and I don't see quantum computing to be widespread (I think i also read somewhere on this forum that quantum computer's have very specific uses

    where would be a good place (preferably free :P ) to find reliable information on topics like this?
  2. jcsd
  3. Aug 16, 2011 #2


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