Patent ID: 11908951
Assignee: LG DISPLAY CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A display device, comprising:
a thin film transistor (TFT) substrate that has a TFT including a gate electrode, a first semiconductor layer and a second semiconductor layer;
a first electrode connected to the TFT; and
wherein the first semiconductor layer, the gate electrode and the second semiconductor layer vertically stacked, and the first and second semiconductor layers are made of polycrystalline silicon, and
wherein the first and second semiconductor layers are electrically connected to each other in series and respectively include first and second channel portions, and at least one of the first and second channel portions has a bent structure in a plan view,
wherein the TFT further comprises:
a first gate insulating layer between the first semiconductor layer and the gat electrode;
a second gate insulating layer between the second semiconductor layer and the gate electrode and on the first gate insulating layer;
a passivation layer on the second semiconductor layer; and
a connection electrode on the passivation layer,
wherein the connection electrode contacts one of a source portion and a drain portion of the second semiconductor layer and the other of a source portion and a drain portion of the first semiconductor layer through a contact hole in the passivation layer and the first and second gate insulating layers, and
wherein a length of a connection path of the one of the source portion and the drain portion of the second semiconductor layer and the other of the source portion and the drain portion of the first semiconductor layer is equal to a distance between the one of the source portion and the drain portion of the second semiconductor layer and the other of the source portion and the drain portion of the first semiconductor layer.