Semiconductor device having an oxide semiconductor film
First Claim
1. A semiconductor device comprising:
- a substrate;
a first insulating film on the substrate;
a first electrode on the first insulating film;
an oxide semiconductor film on the first electrode;
a second electrode on the oxide semiconductor film;
a gate insulating film covering the first electrode, the oxide semiconductor film, and the second electrode; and
a third electrode adjacent to a side surface of the oxide semiconductor film with the gate insulating film interposed therebetween, the third electrode being in contact with the gate insulating film.
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Accused Products
Abstract
To provide a thin film transistor which has high operation speed and in which a large amount of current can flow when the thin film transistor is on and off-state current at the time when the thin film transistor is off is extremely reduced. The thin film transistor is a vertical thin film transistor in which a channel formation region is formed using an oxide semiconductor film in which hydrogen or an OH group contained in the oxide semiconductor is removed so that hydrogen is contained in the oxide semiconductor at a concentration of lower than or equal to 5×1019/cm3, preferably lower than or equal to 5×1018/cm3, more preferably lower than or equal to 5×1017/cm3, and the carrier concentration is lower than or equal to 5×1014/cm3, preferably lower than or equal to 5×1012/cm3.
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Citations
28 Claims
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1. A semiconductor device comprising:
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a substrate; a first insulating film on the substrate; a first electrode on the first insulating film; an oxide semiconductor film on the first electrode; a second electrode on the oxide semiconductor film; a gate insulating film covering the first electrode, the oxide semiconductor film, and the second electrode; and a third electrode adjacent to a side surface of the oxide semiconductor film with the gate insulating film interposed therebetween, the third electrode being in contact with the gate insulating film. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A semiconductor device comprising:
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a substrate; a first insulating film on the substrate; a first electrode on the first insulating film; an oxide semiconductor film on the first electrode; a second electrode on the oxide semiconductor film; a gate insulating film covering the first electrode, the oxide semiconductor film, and the second electrode; and a plurality of third electrodes adjacent to a side surface of the oxide semiconductor film with the gate insulating film interposed therebetween, the plurality of third electrodes being in contact with the gate insulating film. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A semiconductor device comprising:
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a substrate; a first insulating film on the substrate; a plurality of first electrodes on the first insulating film; an oxide semiconductor film on the plurality of first electrodes; a second electrode on the oxide semiconductor film; a gate insulating film covering the plurality of first electrodes, the oxide semiconductor film, and the second electrode; and a plurality of third electrodes adjacent to a side surface of the oxide semiconductor film with the gate insulating film interposed therebetween, the plurality of third electrodes being in contact with the gate insulating film. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
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Specification