Why PMOS is easier to fabricate than NMOS?

Discussion in 'General Electronics Chat' started by wwchieh, Aug 28, 2009.

  1. wwchieh

    Thread Starter Member

    Apr 25, 2009
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    I am just curious to know why PMOS is easier to fabricate than NMOS when I read the history of the MOSFET. Thank you.
     
  2. Wendy

    Moderator

    Mar 24, 2008
    20,764
    2,534
    Actually you have it backwards, NMOS is by far the most common of the two, but both exist.

    I'm having a little trouble backing up why this is, but Wikipedia offers a clue in its http://en.wikipedia.org/wiki/Power_MOSFET article, where it states the following...

    Both are available, but the NMOS are a lot more easy to get, as looking for PMOS taught me. Basically NMOS are smaller than PMOS given the same specs.
     
  3. nanovate

    Distinguished Member

    May 7, 2007
    665
    1
    In the old days the p-channel was more common. The process for it was developed first but as modern techniques were developed we were able to take advantage of the better physical properties of a n-channel device.
     
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