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Semiconductor device having an oxide semiconductor and a metal oxide film

  • US 9,147,768 B2
  • Filed: 03/29/2011
  • Issued: 09/29/2015
  • Est. Priority Date: 04/02/2010
  • Status: Active Grant
First Claim
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1. A semiconductor device comprising:

  • a first gate electrode;

    a gate insulating film over the first gate electrode;

    a metal oxide film over the gate insulating film;

    an oxide semiconductor film over and in contact with the metal oxide film;

    a source electrode and a drain electrode over the oxide semiconductor film;

    an insulating film over and in direct contact with the oxide semiconductor film, the metal oxide film, the source electrode, and the drain electrode; and

    a second gate electrode over the insulating film,wherein the metal oxide film is thicker than the oxide semiconductor film.

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