Method for manufacturing semiconductor device
First Claim
1. A method for manufacturing a semiconductor device, the method comprising the steps of:
- forming a first insulating film over a substrate;
performing oxygen doping treatment on the first insulating film;
forming a source electrode, a drain electrode, and an oxide semiconductor film over the first insulating film;
forming a second insulating film over the source electrode, the drain electrode, and the oxide semiconductor film; and
forming a gate electrode over the second insulating film so that the gate electrode overlaps with the oxide semiconductor film,wherein the first insulating film comprises a fourth insulating film and a fifth insulating film over the fourth insulating film, andwherein the fifth insulating film comprises a component which is the same as that of the oxide semiconductor film.
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Abstract
An embodiment of the disclosed invention is a method for manufacturing a semiconductor device, which includes the steps of forming a first insulating film; performing oxygen doping treatment on the first insulating film to supply oxygen to the first insulating film; forming a source electrode, a drain electrode, and an oxide semiconductor film electrically connected to the source electrode and the drain electrode, over the first insulating film; performing heat treatment on the oxide semiconductor film to remove a hydrogen atom in the oxide semiconductor film; forming a second insulating film over the oxide semiconductor film; and forming a gate electrode in a region overlapping with the oxide semiconductor film, over the second insulating film. The manufacturing method allows the formation of a semiconductor device including an oxide semiconductor, which has stable electrical characteristics and high reliability.
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Citations
27 Claims
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1. A method for manufacturing a semiconductor device, the method comprising the steps of:
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forming a first insulating film over a substrate; performing oxygen doping treatment on the first insulating film; forming a source electrode, a drain electrode, and an oxide semiconductor film over the first insulating film; forming a second insulating film over the source electrode, the drain electrode, and the oxide semiconductor film; and forming a gate electrode over the second insulating film so that the gate electrode overlaps with the oxide semiconductor film, wherein the first insulating film comprises a fourth insulating film and a fifth insulating film over the fourth insulating film, and wherein the fifth insulating film comprises a component which is the same as that of the oxide semiconductor film. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for manufacturing a semiconductor device, the method comprising the steps of:
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forming a first insulating film over a substrate; supplying oxygen to the first insulating film; forming a source electrode, a drain electrode, and an oxide semiconductor film over the first insulating film; forming a second insulating film over the source electrode, the drain electrode, and the oxide semiconductor film; and forming a gate electrode over the second insulating film so that the gate electrode overlaps with the oxide semiconductor film, wherein the first insulating film comprises a fourth insulating film and a fifth insulating film over the fourth insulating film, and wherein the fifth insulating film comprises a component which is the same as that of the oxide semiconductor film. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for manufacturing a semiconductor device, the method comprising the steps of:
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forming a first insulating film over a substrate; performing oxygen doping treatment on the first insulating film; and forming a transistor over the first insulating film, the transistor comprising a source electrode, a drain electrode, an oxide semiconductor film, a gate insulating film, and a gate electrode, wherein the first insulating film comprises a fourth insulating film and a fifth insulating film over the fourth insulating film, and wherein the fifth insulating film comprises a component which is the same as that of the oxide semiconductor film. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
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Specification