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SEMICONDUCTOR DEVICE AND MANUFACTURING METHOD THEREOF

  • US 20110024751A1
  • Filed: 07/29/2010
  • Published: 02/03/2011
  • Est. Priority Date: 07/31/2009
  • Status: Active Grant
First Claim
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1. A semiconductor device comprising:

  • a gate electrode layer provided over an insulating surface;

    a gate insulating layer provided over the gate electrode layer;

    a first oxide semiconductor layer provided over the gate insulating layer;

    a second oxide semiconductor layer provided over and in contact with the first oxide semiconductor layer;

    an oxide insulating layer which overlaps with a first region of the first oxide semiconductor layer and a first region of the second oxide semiconductor layer and is in contact with the second oxide semiconductor layer; and

    a source electrode layer and a drain electrode layer which are provided over the oxide insulating layer and a second region of the first oxide semiconductor layer, overlap with a second region of the second oxide semiconductor layer, and are in contact with the second oxide semiconductor layer,wherein the first region of the first oxide semiconductor layer and the first region of the second oxide semiconductor layer are provided in a region overlapping with the gate electrode layer and in peripheries and side surfaces of the first oxide semiconductor layer and the second oxide semiconductor layer.

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