Method for manufacturing semiconductor device
First Claim
1. A method for manufacturing a semiconductor device, comprising the steps of:
- performing dehydration treatment or dehydrogenation treatment on a substrate in a substrate processing chamber;
introducing the substrate which is dehydrated or dehydrogenated into a first film formation chamber without exposure to air, and forming a first insulating film over the substrate in the first film formation chamber;
introducing the substrate into a second film formation chamber without exposure to air, and forming an oxide semiconductor film over the first insulating film in the second film formation chamber; and
introducing the substrate into a third film formation chamber without exposure to air and forming an oxide conductive film over the oxide semiconductor film in the third film formation chamber.
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Accused Products
Abstract
Electrical characteristics of transistors using an oxide semiconductor are greatly varied in a substrate, between substrates, and between lots, and the electrical characteristics are changed due to heat, bias, light, or the like in some cases. In view of the above, a semiconductor device using an oxide semiconductor with high reliability and small variation in electrical characteristics is manufactured. In a method for manufacturing a semiconductor device, hydrogen in a film and at an interface between films is removed in a transistor using an oxide semiconductor. In order to remove hydrogen at the interface between the films, the substrate is transferred under a vacuum between film formations. Further, as for a substrate having a surface exposed to the air, hydrogen on the surface of the substrate may be removed by heat treatment or plasma treatment.
113 Citations
34 Claims
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1. A method for manufacturing a semiconductor device, comprising the steps of:
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performing dehydration treatment or dehydrogenation treatment on a substrate in a substrate processing chamber; introducing the substrate which is dehydrated or dehydrogenated into a first film formation chamber without exposure to air, and forming a first insulating film over the substrate in the first film formation chamber; introducing the substrate into a second film formation chamber without exposure to air, and forming an oxide semiconductor film over the first insulating film in the second film formation chamber; and introducing the substrate into a third film formation chamber without exposure to air and forming an oxide conductive film over the oxide semiconductor film in the third film formation chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 32)
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11. A method for manufacturing a semiconductor device, comprising the steps of:
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performing dehydration treatment or dehydrogenation treatment on a substrate in a first substrate processing chamber; introducing the substrate which is dehydrated or dehydrogenated into a first film formation chamber without exposure to air, and forming a first insulating film over the substrate in the first film formation chamber; introducing the substrate into a second film formation chamber without exposure to air, and forming an oxide semiconductor film over the first insulating film in the second film formation chamber; introducing the substrate into a second substrate processing chamber without exposure to air and performing heat treatment on the substrate at a temperature higher than or equal to 300°
C. and lower than or equal to 650°
C. in any one of an inert atmosphere, a reduced-pressure atmosphere, and a dry air atmosphere; andintroducing the substrate to a third film formation chamber without exposure to air and forming an oxide conductive film over the oxide semiconductor film in the third film formation chamber. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 33)
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21. A method for manufacturing a semiconductor device, comprising the steps of:
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performing dehydration treatment or dehydrogenation treatment on a substrate in a first substrate processing chamber; introducing the substrate which is dehydrated or dehydrogenated into a first film formation chamber without exposure to air, and forming a first insulating film over the substrate in the first film formation chamber; and introducing the substrate into a second film formation chamber without exposure to air, and forming a first conductive film over the first insulating film in the second film formation chamber. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 34)
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Specification