Semiconductor device having an oxide semiconductor layer
First Claim
1. A semiconductor device comprising:
- an oxide semiconductor layer;
a source electrode in contact with the oxide semiconductor layer comprising;
a first conductive layer; and
a second conductive layer;
a drain electrode in contact with the oxide semiconductor layer comprising;
a third conductive layer; and
a fourth conductive layer;
a gate electrode overlapping with the oxide semiconductor layer; and
a gate insulating layer provided between the oxide semiconductor layer and the gate electrode,wherein the second conductive layer extends beyond an end portion of the first conductive layer,wherein the fourth conductive layer extends beyond an end portion of the third conductive layer, andwherein the end portion of the first conductive layer and the end portion of the third conductive layer are opposed to each other.
1 Assignment
1 Petition
Accused Products
Abstract
An object is to provide a semiconductor device including an oxide semiconductor, which maintains favorable characteristics and achieves miniaturization. The semiconductor device includes an oxide semiconductor layer, a source electrode and a drain electrode in contact with the oxide semiconductor layer, a gate electrode overlapping with the oxide semiconductor layer, and a gate insulating layer provided between the oxide semiconductor layer and the gate electrode, in which the source electrode and the drain electrode each include a first conductive layer, and a second conductive layer having a region which extends in a channel length direction from an end portion of the first conductive layer.
126 Citations
23 Claims
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1. A semiconductor device comprising:
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an oxide semiconductor layer; a source electrode in contact with the oxide semiconductor layer comprising; a first conductive layer; and a second conductive layer; a drain electrode in contact with the oxide semiconductor layer comprising; a third conductive layer; and a fourth conductive layer; a gate electrode overlapping with the oxide semiconductor layer; and a gate insulating layer provided between the oxide semiconductor layer and the gate electrode, wherein the second conductive layer extends beyond an end portion of the first conductive layer, wherein the fourth conductive layer extends beyond an end portion of the third conductive layer, and wherein the end portion of the first conductive layer and the end portion of the third conductive layer are opposed to each other. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A semiconductor device comprising:
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an oxide semiconductor layer; a source electrode comprising; a first conductive layer; and a second conductive layer in contact with the oxide semiconductor layer; a drain electrode comprising; a third conductive layer; and a fourth conductive layer in contact with the oxide semiconductor layer; a gate electrode overlapping with the oxide semiconductor layer; and a gate insulating layer provided between the oxide semiconductor layer and the gate electrode, wherein the second conductive layer is over the first conductive layer, and the second conductive layer has a higher resistance than the first conductive layer, and wherein the fourth conductive layer is over the third conductive layer, and the fourth conductive layer has a higher resistance than the third conductive layer. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A semiconductor device comprising:
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an oxide semiconductor layer; a source electrode comprising; a first conductive layer; and a second conductive layer in contact with the oxide semiconductor layer; a drain electrode comprising; a third conductive layer; and a fourth conductive layer in contact with the oxide semiconductor layer; a gate electrode overlapping with the oxide semiconductor layer; and a gate insulating layer provided between the oxide semiconductor layer and the gate electrode, wherein the first conductive layer is over the second conductive layer, and the second conductive layer has a higher resistance than the first conductive layer, and wherein the third conductive layer is over the fourth conductive layer, and the fourth conductive layer has a higher resistance than the third conductive layer. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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22. A semiconductor device comprising:
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an oxide semiconductor layer including a channel formation region; a source electrode including a region in contact with the channel formation region; a drain electrode including a region in contact with the channel formation region; a gate electrode overlapping with the channel formation region; and a gate insulating layer provided between the oxide semiconductor layer and the gate electrode, wherein the region of the source electrode has a higher resistance than other regions of the source electrode, and wherein the region of the drain electrode has a higher resistance than other regions of the drain electrode. - View Dependent Claims (23)
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Specification