Semiconductor device and manufacturing method thereof
First Claim
Patent Images
1. An active matrix EL display device comprising:
- a thin film transistor over a substrate, the thin film transistor including;
a gate electrode;
an oxide semiconductor film adjacent to the gate electrode with an insulating film interposed therebetween; and
a pair of electrodes adjacent to the oxide semiconductor film, wherein each of the pair of electrodes comprises at least one of tungsten, molybdenum, platinum, and titanium; and
a light emitting element electrically connected to the thin film transistor, the light emitting element including;
a first electrode electrically connected to the thin film transistor;
a light emitting layer comprising an organic light emitting material formed over the first electrode; and
a second electrode formed over the light emitting layer,wherein the oxide semiconductor film comprises an In—
Ga—
Zn—
O based oxide semiconductor.
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Abstract
An object is to provide a semiconductor device of which a manufacturing process is not complicated and by which cost can be suppressed, by forming a thin film transistor using an oxide semiconductor film typified by zinc oxide, and a manufacturing method thereof. For the semiconductor device, a gate electrode is formed over a substrate; a gate insulating film is formed covering the gate electrode; an oxide semiconductor film is formed over the gate insulating film; and a first conductive film and a second conductive film are formed over the oxide semiconductor film. The oxide semiconductor film has at least a crystallized region in a channel region.
890 Citations
69 Claims
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1. An active matrix EL display device comprising:
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a thin film transistor over a substrate, the thin film transistor including; a gate electrode; an oxide semiconductor film adjacent to the gate electrode with an insulating film interposed therebetween; and a pair of electrodes adjacent to the oxide semiconductor film, wherein each of the pair of electrodes comprises at least one of tungsten, molybdenum, platinum, and titanium; and a light emitting element electrically connected to the thin film transistor, the light emitting element including; a first electrode electrically connected to the thin film transistor; a light emitting layer comprising an organic light emitting material formed over the first electrode; and a second electrode formed over the light emitting layer, wherein the oxide semiconductor film comprises an In—
Ga—
Zn—
O based oxide semiconductor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An active matrix EL display device comprising:
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a thin film transistor over a substrate, the thin film transistor including; a gate electrode; an oxide semiconductor film adjacent to the gate electrode with an insulating film interposed therebetween; and a pair of electrodes formed adjacent to the oxide semiconductor film wherein each of the pair of electrodes comprises metal nitride, the metal being any one of tungsten, molybdenum, platinum, and titanium; a light emitting element electrically connected to the thin film transistor, the light emitting element including; a first electrode electrically connected to the thin film transistor; a light emitting layer comprising an organic light emitting material formed over the first electrode; and a second electrode formed over the light emitting layer, wherein the oxide semiconductor film comprises an In—
Ga—
Zn—
O based oxide semiconductor. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. An active matrix EL display device comprising:
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a thin film transistor over a substrate, the thin film transistor including; a gate electrode; an oxide semiconductor film adjacent to the gate electrode with an insulating film interposed therebetween; and a pair of transparent conductive oxide layers adjacent to the oxide semiconductor film; and a light emitting element electrically connected to the thin film transistor, the light emitting element including; a first electrode electrically connected to the thin film transistor; a light emitting layer comprising an organic light emitting material formed over the first electrode; and a second electrode formed over the light emitting layer, wherein the oxide semiconductor film comprises an In—
Ga—
Zn—
O based oxide semiconductor. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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28. An active matrix EL display device comprising:
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a first thin film transistor formed over a substrate, the first thin film transistor including; a first gate electrode; a first oxide semiconductor film adjacent to the first gate electrode with a first insulating film interposed therebetween, and a pair of electrodes adjacent to the first oxide semiconductor film wherein each of the pair of electrodes comprises at least one of tungsten, molybdenum, platinum, and titanium; a light emitting element electrically connected to the first thin film transistor, the light emitting element including; a first electrode electrically connected to the first thin film transistor; a light emitting layer comprising an organic light emitting material formed over the first electrode; and a second electrode formed over the light emitting layer; a scanning line driver circuit operationally connected to the first thin film transistor; and a signal line driver circuit operationally connected to the first thin film transistor; wherein at least one of the scanning line driver circuit and the signal line driver circuit comprises a second thin film transistor over the substrate, the second thin film transistor including; a second gate electrode; and a second oxide semiconductor film adjacent to the second gate electrode with a second insulating film interposed therebetween, wherein each of the first oxide semiconductor film and the second oxide semiconductor film comprises an In—
Ga—
Zn—
O based oxide semiconductor. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35)
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36. An active matrix EL display device comprising:
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a first thin film transistor formed over a substrate, the first thin film transistor including; a first gate electrode; a first oxide semiconductor film adjacent to the first gate electrode with a first insulating film interposed therebetween; and a pair of electrodes adjacent to the first oxide semiconductor film wherein each of the pair of electrodes comprises metal nitride, the metal being any one of tungsten, molybdenum, platinum, and titanium; a light emitting element electrically connected to the first thin film transistor, the light emitting element including; a first electrode electrically connected to the first thin film transistor; a light emitting layer comprising an organic light emitting material formed over the first electrode; and a second electrode formed over the light emitting layer; and a scanning line driver circuit operationally connected to the first thin film transistor; and a signal line driver circuit operationally connected to the first thin film transistor, wherein at least one of the scanning line driver circuit and the signal line driver circuit comprises a second thin film transistor over the substrate, the second thin film transistor including; a second gate electrode; a second oxide semiconductor film adjacent to the second gate electrode with a second insulating film interposed therebetween, wherein each of the first oxide semiconductor film and the second oxide semiconductor film comprises an In—
Ga—
Zn—
O based oxide semiconductor. - View Dependent Claims (37, 38, 39, 40, 41, 42)
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43. An active matrix EL display device comprising:
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a first thin film transistor formed over a substrate, the first thin film transistor including; a first gate electrode over the substrate; a first oxide semiconductor film adjacent to the first gate electrode with a first insulating film interposed therebetween; and a pair of transparent conductive oxide layers adjacent to the first oxide semiconductor film; a light emitting element electrically connected to the first thin film transistor, the light emitting element including; a first electrode electrically connected to the first thin film transistor one of the pair of electrodes; a light emitting layer comprising an organic light emitting material formed over the first electrode; and a second electrode formed over the light emitting layer, a scanning line driver circuit operationally connected to the first thin film transistor; and a signal line driver circuit operationally connected to the first thin film transistor, wherein at least one of the scanning line driver circuit and the signal line driver circuit comprises a second thin film transistor over the substrate, the second thin film transistor including; a second gate electrode; and a second oxide semiconductor film adjacent to the second gate electrode with a second insulating film interposed therebetween, wherein each of the first oxide semiconductor film and the second oxide semiconductor film comprises an In—
Ga—
Zn—
O based oxide semiconductor. - View Dependent Claims (44, 45, 46, 47, 48)
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49. An active matrix EL display device comprising:
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a thin film transistor over a substrate, the thin film transistor including; a gate electrode; an oxide semiconductor film adjacent to the gate electrode with an insulating film interposed therebetween; a pair of n-type oxide semiconductor layers adjacent to the oxide semiconductor film; and a pair of electrodes adjacent to the pair of n-type oxide semiconductor layers, wherein each of the pair of electrodes comprises at least one of tungsten, molybdenum, platinum, and titanium; and a light emitting element electrically connected to the thin film transistor, the light emitting element including; a first electrode electrically connected to the thin film transistor; a light emitting layer comprising an organic light emitting material formed over the first electrode; and a second electrode formed over the light emitting layer, wherein one of the pair of n-type oxide semiconductor layers is between one of the pair of electrodes and the oxide semiconductor film, wherein the other of the pair of n-type oxide semiconductor layers is between the other of the pair of electrodes and the oxide semiconductor film, and wherein the oxide semiconductor film comprises an In—
Ga—
Zn—
O based oxide semiconductor. - View Dependent Claims (50, 51, 52, 53, 54, 55)
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56. An active matrix EL display device comprising:
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a thin film transistor over a substrate, the thin film transistor comprising; a gate electrode; an oxide semiconductor film adjacent to the gate electrode with an insulating film interposed therebetween; a pair of n-type oxide semiconductor layers adjacent to the oxide semiconductor film; and a pair of electrodes adjacent to the pair of n-type oxide semiconductor layers, wherein each of the pair of electrodes comprises a metal nitride, the metal being any one of tungsten, molybdenum, platinum, and titanium; and a light emitting element electrically connected to the thin film transistor, the light emitting element including; a first electrode electrically connected to the thin film transistor; a light emitting layer comprising an organic light emitting material formed over the first electrode; and a second electrode formed over the light emitting layer, wherein one of the pair of n-type oxide semiconductor layers is between one of the pair of electrodes and the oxide semiconductor film, wherein the other of the pair of n-type oxide semiconductor layers is between the other of the pair of electrodes and the oxide semiconductor film, and wherein the oxide semiconductor film comprises an In—
Ga—
Zn—
O based oxide semiconductor. - View Dependent Claims (57, 58, 59, 60, 61, 62)
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63. An active matrix EL display device comprising:
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a thin film transistor over a substrate, the thin film transistor comprising; a gate electrode; an oxide semiconductor film adjacent to the gate electrode with an insulating film interposed therebetween; a pair of n-type oxide semiconductor layers adjacent to the oxide semiconductor film; and a pair of transparent conductive oxide layers adjacent to the pair of n-type oxide semiconductor layers; and a light emitting element electrically connected to the thin film transistor, the light emitting element including; a first electrode electrically connected to the thin film transistor; a light emitting layer comprising an organic light emitting material formed over the first electrode; and a second electrode formed over the light emitting layer, wherein one of the pair of n-type oxide semiconductor layers is between one of the pair of transparent conductive oxide layers and the oxide semiconductor film, wherein the other of the pair of n-type oxide semiconductor layers is between the other of the pair of transparent conductive oxide layers and the oxide semiconductor film, and wherein the oxide semiconductor film comprises an In—
Ga—
Zn—
O based oxide semiconductor. - View Dependent Claims (64, 65, 66, 67, 68, 69)
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Specification