Semiconductor device and display device having a protection layer
First Claim
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1. A semiconductor device comprising:
- a first insulating film;
a first semiconductor layer formed of polycrystalline silicon;
a second semiconductor layer located on the first insulating film and formed of an oxide semiconductor;
a second insulating film arranged on the first insulating film and the second semiconductor layer;
a first gate electrode opposed to a top surface of the first semiconductor layer;
a second gate electrode located above the second insulating film and opposed to the second semiconductor layer;
a third insulating film located above the second insulating film, the first gate electrode, and the second gate electrode and formed of silicon nitride; and
a protection layer located between the second insulating film and the third insulating film, opposed to the second semiconductor layer, and formed of either an aluminum oxide or fluorinated silicon nitride.
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Abstract
According to one embodiment, a semiconductor device includes a first insulating film, a first semiconductor layer formed of polycrystalline silicon, a second semiconductor layer formed of an oxide semiconductor, a second insulating film, a first gate electrode, a second gate electrode, a third insulating film formed of silicon nitride, and a protection layer. The protection layer is located between the second insulating film and the third insulating film, is opposed to the second semiconductor layer, and is formed of either an aluminum oxide or fluorinated silicon nitride.
19 Citations
13 Claims
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1. A semiconductor device comprising:
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a first insulating film; a first semiconductor layer formed of polycrystalline silicon; a second semiconductor layer located on the first insulating film and formed of an oxide semiconductor; a second insulating film arranged on the first insulating film and the second semiconductor layer; a first gate electrode opposed to a top surface of the first semiconductor layer; a second gate electrode located above the second insulating film and opposed to the second semiconductor layer; a third insulating film located above the second insulating film, the first gate electrode, and the second gate electrode and formed of silicon nitride; and a protection layer located between the second insulating film and the third insulating film, opposed to the second semiconductor layer, and formed of either an aluminum oxide or fluorinated silicon nitride. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A display device comprising:
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a plurality of scanning lines; a plurality of signal lines; a plurality of pixels, each of the pixels being defined by two adjacent scanning lines and two adjacent signal lines; and a thin-film transistor included in at least one of the pixels, wherein the thin-film transistor includes a first insulating film, a first semiconductor layer formed of polycrystalline silicon, a second semiconductor layer located on the first insulating film and formed of an oxide semiconductor, a second insulating film arranged on the first insulating film and the second semiconductor layer, a first gate electrode opposed to a top surface of the first semiconductor layer; a second gate electrode located above the second insulating film and opposed to the second semiconductor layer; a third insulating film located above the second insulating film, the first gate electrode, and the second gate electrode and formed of silicon nitride, and a protection layer located between the second insulating film and the third insulating film, opposed to the second semiconductor layer, and formed of either an aluminum oxide or fluorinated silicon nitride. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A semiconductor device comprising:
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a first insulating film; a semiconductor layer located on the first insulating film and formed of an oxide semiconductor; a second insulating film arranged on the first insulating film and the semiconductor layer; a gate electrode located above the second insulating film and opposed to the semiconductor layer; a third insulating film located above the second insulating film and the gate electrode and formed of silicon nitride; and a protection layer located between the second insulating film and the third insulating film, opposed to the semiconductor layer, and formed of either an aluminum oxide or fluorinated silicon nitride.
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Specification