Semiconductor device
First Claim
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1. A semiconductor device comprising:
- a semiconductor layer;
a first insulating layer formed on the semiconductor layer, said first insulating layer including a gate insulating layer;
a gate electrode formed on the insulating layer;
a first wiring formed on said first insulating layer provided on said semiconductor layer, said wiring comprising the same material as said gate electrode and connected to said gate electrode; and
a second wiring extending over said first wiring, wherein a surface of said gate electrode and said first wiring is each covered with an anodic oxidation film of said gate electrode and said first wiring, and said second wiring is isolated from said first wiring by the anodic oxidation film of said first wiring.
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Abstract
A semiconductor device or a semiconductor integrated circuit includes a field effect transistor having a source region, a drain region and a channel regions formed within a semiconductor substrate. A lower wiring is formed on the semiconductor substrate to form a gate electrode and its extension and oxidized to form an oxide film covering the lower wiring. An upper wiring is formed over the lower wiring on the semiconductor substrate to make contact with the drain or source region. The lower wiring is electrically insulated from the upper wiring by the oxide film.
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Citations
26 Claims
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1. A semiconductor device comprising:
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a semiconductor layer; a first insulating layer formed on the semiconductor layer, said first insulating layer including a gate insulating layer; a gate electrode formed on the insulating layer; a first wiring formed on said first insulating layer provided on said semiconductor layer, said wiring comprising the same material as said gate electrode and connected to said gate electrode; and a second wiring extending over said first wiring, wherein a surface of said gate electrode and said first wiring is each covered with an anodic oxidation film of said gate electrode and said first wiring, and said second wiring is isolated from said first wiring by the anodic oxidation film of said first wiring. - View Dependent Claims (2, 3, 4, 5, 6, 7, 10, 11, 12)
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8. A semiconductor device comprising:
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a gate insulating layer formed on a semiconductor; a gate electrode formed on said gate insulating layer; a channel region formed within said semiconductor below said gate electrode; a pair of first impurity regions formed within said semiconductor between which said channel region is defined, where said first impurity regions are doped with an impurity at a first concentration; and a pair of second impurity regions adjacent to said first impurity regions within said semiconductor where said second impurity regions are doped with the impurity at a second concentration higher than said first concentration, wherein said gate electrode is covered with an oxide layer of said gate electrode and said channel region extends beyond edges of said gate electrode. - View Dependent Claims (9)
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13. A semiconductor device comprising:
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a gate insulating layer formed on a semiconductor layer; a gate electrode formed on said gate insulating layer; a channel region formed within said semiconductor layer below said gate electrode; a pair of first impurity regions formed within said semiconductor layer between which said channel region is defined, where said first impurity regions are doped with an impurity at a first concentration; and a pair of second impurity regions adjacent to said first impurity regions within said semiconductor layer where said second impurity regions are doped with the impurity at a second concentration higher than said first concentration, wherein said gate electrode is covered with an oxide layer of said gate electrode and where said first impurity regions are located under said oxide layer. - View Dependent Claims (14, 15, 16)
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17. A semiconductor device comprising:
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a gate insulating layer formed on a semiconductor layer; a gate electrode formed on said gate insulating layer; a channel region formed within said semiconductor layer below said gate electrode; a pair of first impurity regions formed within said semiconductor layer between which said channel region is defined, where said first impurity regions are doped with an impurity at a first concentration; and a pair of second impurity regions adjacent to said first impurity regions within said semiconductor layer where said second impurity regions are doped with the impurity at a second concentration higher than said first concentration, wherein said gate electrode is covered with an oxide layer of said gate electrode and where said channel region extends to but not beyond edges of said gate electrode. - View Dependent Claims (18, 19, 20)
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21. A semiconductor device comprising:
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a gate insulating layer formed on a semiconductor layer; a gate electrode formed on said gate insulating layer; a channel region formed within said semiconductor layer below said gate electrode; a pair of first impurity regions formed within said semiconductor layer between which said channel region is defined, where said first impurity regions are doped with an impurity at a first concentration; and a pair of second impurity regions adjacent to said first impurity regions within said semiconductor layer where said second impurity regions are doped with the impurity at a second concentration higher than said first concentration, a further insulating layer formed on said semiconductor layer over at least said second impurity regions; wherein said gate electrode is covered with an oxide layer of said gate electrode and where said further insulating layer is thicker than said gate insulating layer. - View Dependent Claims (22, 23, 24, 25, 26)
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Specification