Display substrate comprising interconnected first and second wirings and display device including the same
AssigneeSamsung Display Co., Ltd.
InventorsJi-Yong Park, Tae-Gon Kim
Life of this patent
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Abstract
Display substrates and display devices with reduced electrical resistance are disclosed. One inventive aspect includes a switching device, a first wiring and a second wiring. The switching device includes a first semiconductor layer, first and second gate insulation layers, a source electrode and a drain electrode. The source and drain electrodes are formed to electrically connect, through the first and second gate insulation layers, to the first semiconductor layer. The second wiring is formed on the second gate insulation layer and electrically connected to the first wiring.
Claims10
A display substrate, comprising:
- a switching device including:
- a first semiconductor layer,
- a first gate insulation layer,
- a gate electrode,
- a second gate insulation layer,
- an insulation interlayer,
- a source electrode, and
- a drain electrode,
- wherein the first semiconductor layer, the first gate insulation layer, the gate electrode, the second gate insulation layer, and the insulation interlayer are sequentially formed on a base substrate,
- wherein a portion of the source electrode and a portion of the drain electrode are formed on the insulation interlayer to be electrically connected, through the second and first gate insulation layers, to the first semiconductor layer;
- a first wiring formed on the first gate insulation layer;
- a second wiring formed on the second gate insulation layer, the second wiring being formed over the first wiring and electrically connected to the first wiring;
- a lower electrode formed on a same layer as the first wiring;
- and
- an upper electrode formed on a same layer as the second wiring and formed on a different layer from that of the portion of the source electrode and the portion of the drain electrode, wherein the lower electrode, the second gate insulation layer, and the upper electrode are configured to form a capacitor.
A display device, comprising:
- a switching device including a first semiconductor layer, a first gate insulation layer, a gate electrode, a second gate insulation layer, and an insulation interlayer sequentially formed on a base substrate, the switching device further including a source electrode and a drain electrode which are formed through the insulation interlayer and the second and first gate insulation layers to be electrically connected to the first semiconductor layer, wherein a portion of the source electrode and a portion of the drain electrode are formed on the insulation interlayer;
- a first wiring on the first gate insulation layer;
- a second wiring on the second gate insulation layer, the second wiring being superimposed over the first wiring and being electrically connected to the first wiring;
- a lower electrode formed on a same layer as the first wiring;
- an upper electrode formed on a same layer as the second wiring and formed on a different layer from that of the portion of the source electrode and the portion of the drain electrode, wherein the lower electrode, the second gate insulation layer, and the upper electrode are configured to form a capacitor;
- a first electrode electrically connected to the drain electrode;
- an organic light emitting layer on the first electrode;
- and
- a second electrode on the organic light emitting layer.
Dependencies are inferred from the claim text.