Display apparatus
A display apparatus includes: a transistor; a storage capacitor connected to the transistor; and a light-emitting diode electrically connected to the transistor and the storage capacitor, wherein the transistor includes: a gate electrode on a substrate and having a first sub-layer and a second sub-layer on the first sub-layer; and a semiconductor layer having a channel area, a first low-resistance area, and a second low-resistance area, wherein the channel area overlaps the gate electrode, and the first and second low-resistance areas are on both sides of the channel area, a width of the first sub-layer is greater than a width of the second sub-layer, the channel area is arranged along a side surface of the second sub-layer, the storage capacitor includes a first capacitor electrode and a second capacitor electrode, and the first capacitor electrode is on a same layer and includes a same material as the gate electrode.
1 . A display apparatus comprising:
a thin-film transistor;
a storage capacitor electrically connected to the thin-film transistor; and
a light-emitting diode electrically connected to the thin-film transistor and the storage capacitor,
wherein the thin-film transistor comprises:
a gate electrode on a substrate and comprising a first sub-layer and a second sub-layer on the first sub-layer;
a semiconductor layer on the gate electrode and comprising a channel area, a first low-resistance area, and a second low-resistance area, wherein the channel area overlaps the gate electrode, and the first and second low-resistance areas are at a same layer and extending at both sides of the channel area, and
a first electrode overlapping and electrically connected to one of the first low-resistance area or the second low-resistance area, and the channel area between the first electrode and the gate electrode in a thickness direction of the display apparatus,
wherein a width of the first sub-layer is greater than a width of the second sublayer,
the channel area is arranged along a side surface of the second sub-layer,
the storage capacitor comprises a first capacitor electrode and a second capacitor electrode on the first capacitor electrode, and
the first capacitor electrode is on a same layer and comprises a same material as the gate electrode.
2 . The display apparatus of claim 1 , wherein the first capacitor electrode comprises:
a first capacitor sub-layer comprising a same material as the first sub-layer; and
a second capacitor sub-layer comprising a same material as the second sub-layer.
3 . The display apparatus of claim 1 , wherein a thickness of the second sub-layer is greater than a thickness of the first sub-layer.
4 . The display apparatus of claim 1 , wherein the first sub-layer comprises tail areas extending from a point at which an upper surface of the first sub-layer meets the side surface of the second sub-layer, and
a length of each tail area is equal to or greater than 1 μm.
5 . The display apparatus of claim 1 , wherein the gate electrode is a portion of a first conductive pattern comprising the first capacitor electrode.
6 . The display apparatus of claim 5 , wherein the first conductive pattern comprises a first portion, which overlaps the second capacitor electrode in a plan view, and a second portion, which protrudes from the first portion in one direction.
7 . The display apparatus of claim 1 , wherein the storage capacitor comprises a connection electrode between and overlapping the first capacitor electrode and the second capacitor electrode, and
the connection electrode is in contact with the second capacitor electrode.
8 . The display apparatus of claim 7 , wherein the connection electrode is on a same layer and comprises a same material as the semiconductor layer.
9 . The display apparatus of claim 1 , wherein the semiconductor layer comprises an oxide semiconductor material.
10 . The display apparatus of claim 1 , wherein
the first electrode comprises a tri-layer comprising a conductive material.
11 . A display apparatus comprising:
a substrate;
a driving power line extending on the substrate in a first direction;
a driving thin-film transistor electrically connected to the driving power line; and
a storage capacitor electrically connected to the driving thin-film transistor and comprising a first capacitor electrode and a second capacitor electrode overlapping the first capacitor electrode,
wherein the driving thin-film transistor comprises:
a driving gate electrode comprising a first sub-layer on the substrate and a second sub-layer on the first sub-layer;
a gate insulating layer on the driving gate electrode;
a driving semiconductor layer on the gate insulating layer and comprising a channel area, a first low-resistance area, and a second low-resistance area, wherein the channel area overlaps the driving gate electrode, and the first and second low-resistance areas are at a same layer and extending at both sides of the channel area, and
a first electrode overlapping and electrically connected to one of the first low-resistance area or the second low-resistance area, and the channel area between the first electrode and the driving gate electrode in a thickness direction of the display apparatus,
wherein a width of the first sub-layer is greater than a width of the second sublayer,
the channel area is arranged along a side surface of the second sub-layer, and
the first capacitor electrode comprises a first capacitor sub-layer, which comprises a same material as the first sub-layer, and a second capacitor sub-layer, which comprises a same material as the second sub-layer.
12 . The display apparatus of claim 11 , wherein at least one of the first low-resistance area or the second low-resistance area comprises an area that does not overlap the driving gate electrode.
13 . The display apparatus of claim 11 , wherein a vertical distance between an upper surface of the substrate and the first low-resistance area is different from a vertical distance between the upper surface of the substrate and the second low-resistance area.
14 . The display apparatus of claim 11 , wherein a portion of the first capacitor electrode comprises the driving gate electrode, and
the portion of the first capacitor electrode extends to a lower portion of the driving semiconductor layer to overlap the channel area of the driving semiconductor layer.
15 . The display apparatus of claim 11 , further comprising:
a data line extending in the first direction; and
a switching thin-film transistor electrically connected to the driving thin-film transistor and the data line.
16 . The display apparatus of claim 11 , further comprising:
a sensing line extending in the first direction; and
a sensing thin-film transistor electrically connected to the driving thin-film transistor and the sensing line.
17 . The display apparatus of claim 11 , wherein a thickness of the second sub-layer is greater than a thickness of the first sub-layer.
18 . The display apparatus of claim 11 , wherein the first sub-layer comprises tail areas extending from a point at which an upper surface of the first sub-layer meets the side surface of the second sub-layer, and
a length of each tail area is equal to or greater than 1 μm.
19 . The display apparatus of claim 11 , wherein the storage capacitor further comprises a connection electrode between and overlapping the first capacitor electrode and the second capacitor electrode, and the connection electrode is in contact with the second capacitor electrode.
20 . The display apparatus of claim 19 , wherein the connection electrode is on a same layer and comprises a same material as the driving semiconductor layer.
21 . The display apparatus of claim 1 , wherein the second sub-layer overlaps the first low-resistance area and does not overlap the second low-resistance area.