SEMICONDUCTOR DEVICE AND MANUFACTURING METHOD THEREOF
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Abstract
To provide a semiconductor device in which a defect or fault is not generated and a manufacturing method thereof even if a ZnO semiconductor film is used and a ZnO film to which an n-type or p-type impurity is added is used for a source electrode and a drain electrode. The semiconductor device includes a gate insulating film formed by using a silicon oxide film or a silicon oxynitride film over a gate electrode, an Al film or an Al alloy film over the gate insulating film, a ZnO film to which an n-type Or p-type impurity is added over the Al film or the Al alloy film, and a ZnO semiconductor film over the ZnO film to which an n-type or p-type impurity is added and the gate insulating film.
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Citations
33 Claims
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1-4. -4. (canceled)
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5. A method of manufacturing a semiconductor device comprising the steps of:
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forming a gate electrode over a substrate; forming a first insulating film over the gate electrode; forming an oxide semiconductor film over the gate electrode with the first insulating film interposed therebetween; patterning the oxide semiconductor film by dry etching to form an island-shape oxide semiconductor film, the island-shape oxide semiconductor film including a channel formation region; and forming a silicon containing insulating film by sputtering over the island-shape oxide semiconductor film, the silicon containing insulating film being in contact with the island-shape oxide semiconductor film. - View Dependent Claims (6, 7, 8, 9)
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10. A method of manufacturing a semiconductor device comprising the steps of:
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forming a gate electrode over a substrate; forming a first insulating film over the gate electrode; forming a pair of first conductive layers each comprising a metal film; forming a pair of second conductive layers on the pair of first conductive layers, each of the pair of second conductive layers comprising zinc oxide; forming an island-shape oxide semiconductor film over the pair of second conductive layers and the gate electrode wherein the first insulating film is interposed between the gate electrode and the island-shape oxide semiconductor film; and forming a silicon containing insulating film by sputtering over the island-shape oxide semiconductor film, the silicon containing insulating film being in contact with the island-shape oxide semiconductor film. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A method of manufacturing a semiconductor device comprising the steps of:
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forming a gate electrode over a substrate; forming a first insulating film over the gate electrode; forming a pair of first conductive layers each comprising a metal film; forming a pair of second conductive layers on the pair of first conductive layers, each of the pair of second conductive layers comprising zinc oxide; forming an oxide semiconductor film over the pair of second conductive layers and the gate electrode wherein the first insulating film is interposed between the gate electrode and the oxide semiconductor film; patterning the oxide semiconductor film by dry etching to form an island-shape oxide semiconductor film; and forming a silicon containing insulating film by sputtering over the island-shape oxide semiconductor film, the silicon containing insulating film being in contact with the island-shape oxide semiconductor film. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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25. A method of manufacturing a semiconductor device comprising the steps of:
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forming a gate electrode over a substrate; forming a first insulating film over the gate electrode; forming an oxide semiconductor film over the gate electrode with the first insulating film interposed therebetween; patterning the oxide semiconductor film by dry etching to form an island-shape oxide semiconductor film, the island-shape oxide semiconductor film including a channel formation region. - View Dependent Claims (26, 27, 28)
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29. A method of manufacturing a semiconductor device comprising the steps of:
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forming an oxide semiconductor film over a substrate; and patterning the oxide semiconductor film by dry etching to form an island-shape oxide semiconductor film. - View Dependent Claims (30, 31, 32, 33)
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Specification