Semiconductor device, power diode, and rectifier
First Claim
1. A semiconductor device comprising:
- a first electrode;
a gate insulating layer over the first electrode;
an oxide semiconductor layer over the gate insulating layer;
a pair of second electrodes covering end portions of the oxide semiconductor layer;
an insulating layer over the pair of second electrodes; and
a third electrode over the insulating layer,wherein the oxide semiconductor layer overlaps with the first electrode,wherein the third electrode overlaps with the oxide semiconductor layer,wherein a side surface of the oxide semiconductor layer in a channel width direction faces to the third electrode with the insulating layer interposed therebetween, andwherein a width of the oxide semiconductor layer
1 Assignment
0 Petitions
Accused Products
Abstract
An object is to provide a semiconductor device having electrical characteristics such as high withstand voltage, low reverse saturation current, and high on-state current. In particular, an object is to provide a power diode and a rectifier which include non-linear elements. An embodiment of the present invention is a semiconductor device including a first electrode, a gate insulating layer covering the first electrode, an oxide semiconductor layer in contact with the gate insulating layer and overlapping with the first electrode, a pair of second electrodes covering end portions of the oxide semiconductor layer, an insulating layer covering the pair of second electrodes and the oxide semiconductor layer, and a third electrode in contact with the insulating layer and between the pair of second electrodes. The pair of second electrodes are in contact with end surfaces of the oxide semiconductor layer.
-
Citations
28 Claims
-
1. A semiconductor device comprising:
-
a first electrode; a gate insulating layer over the first electrode; an oxide semiconductor layer over the gate insulating layer; a pair of second electrodes covering end portions of the oxide semiconductor layer; an insulating layer over the pair of second electrodes; and a third electrode over the insulating layer, wherein the oxide semiconductor layer overlaps with the first electrode, wherein the third electrode overlaps with the oxide semiconductor layer, wherein a side surface of the oxide semiconductor layer in a channel width direction faces to the third electrode with the insulating layer interposed therebetween, and wherein a width of the oxide semiconductor layer - View Dependent Claims (2, 3, 4, 5, 6, 25)
-
-
7. A power diode comprising a plurality of non-linear elements, one of the plurality of non-linear elements comprising:
-
a first electrode; a gate insulating layer over the first electrode; an oxide semiconductor layer over the gate insulating layer; a pair of second electrodes covering end portions of the oxide semiconductor layer; an insulating layer over the pair of second electrodes; and a third electrode over the insulating layer; wherein the oxide semiconductor layer overlaps with the first electrode, wherein the third electrode overlaps with the oxide semiconductor layer, wherein a side surface of the oxide semiconductor layer in a channel width direction faces to the third electrode with the insulating layer interposed therebetween, wherein a width of the oxide semiconductor layer is larger than a width of the third electrode in a channel length direction, wherein one of the pair of second electrodes is in contact with the first electrode through an opening portion provided in the gate insulating layer, and wherein the plurality of non-linear elements is connected in series in a forward direction. - View Dependent Claims (8, 9, 10, 11, 12, 26)
-
-
13. A rectifier comprising a first non-linear element and a second non-linear element, each of the first non-linear element and the second non-linear element comprising:
-
a first electrode; a gate insulating layer over the first electrode; an oxide semiconductor layer over the gate insulating layer; a pair of second electrodes covering end portions of the oxide semiconductor layer; an insulating layer over the pair of second electrodes; and a third electrode over the insulating layer, wherein the oxide semiconductor layer overlaps with the first electrode, wherein the third electrode overlaps with the oxide semiconductor layer, wherein a side surface of the oxide semiconductor layer in a channel width direction faces to the third electrode with the insulating layer interposed therebetween, wherein a width of the oxide semiconductor layer is larger than a width of the third electrode in a channel length direction, wherein one of the pair of second electrodes is in contact with the first electrode through an opening portion provided in the gate insulating layer, wherein an anode of the first non-linear element is connected to a reference potential on a low potential side, wherein a cathode of the first non-linear element is connected to an input portion and an anode of the second non-linear element, and wherein a cathode of the second non-linear element is connected to an output portion. - View Dependent Claims (14, 15, 16, 17, 18, 27)
-
-
19. A semiconductor device comprising:
-
a first electrode; a gate insulating layer over the first electrode; an oxide semiconductor layer over the gate insulating layer; a pair of second electrodes covering end portions of the oxide semiconductor layer; an insulating layer over the pair of second electrodes; and a third electrode over the insulating layer, wherein the oxide semiconductor layer overlaps with the first electrode, wherein the third electrode overlaps with the oxide semiconductor layer, wherein a side surface of the oxide semiconductor layer in a channel width direction faces to the third electrode with the insulating layer interposed therebetween, wherein a width of the first electrode is larger than a width of the oxide semiconductor layer in a channel length direction, and wherein a width of the oxide semiconductor layer is larger than a width of the third electrode in the channel length direction. - View Dependent Claims (20, 21, 22, 23, 24, 28)
-
Specification