US 12,324,241 B2
Method for preparing display panel, display panel, and electronic device
Linfeng Liu, Shenzhen (CN)
Assigned to TCL China Star Optoelectronics Technology Co., Ltd., Shenzhen (CN)
Appl. No. 17/621,998
Filed by TCL China Star Optoelectronics Technology Co., Ltd., Guangdong (CN)
PCT Filed Dec. 8, 2021, PCT No. PCT/CN2021/136594
§ 371(c)(1), (2) Date Dec. 22, 2021,
PCT Pub. No. WO2023/092661, PCT Pub. Date Jun. 1, 2023.
Claims priority of application No. 202111405349.X (CN), filed on Nov. 24, 2021.
Prior Publication US 2024/0297175 A1, Sep. 5, 2024
Int. Cl. H10D 86/60 (2025.01); H01L 25/075 (2006.01); H01L 25/16 (2023.01); H10D 86/01 (2025.01); H10D 86/40 (2025.01); H10H 20/857 (2025.01)
CPC H10D 86/60 (2025.01) [H01L 25/0753 (2013.01); H01L 25/167 (2013.01); H10D 86/0214 (2025.01); H10D 86/441 (2025.01); H10H 20/857 (2025.01)] 20 Claims
OG exemplary drawing
 
1. A method for preparing a display panel, comprising following steps:
obtaining a thin film transistor (TFT) substrate, wherein the TFT substrate comprises a first base and a plurality of TFT devices disposed on the first base, and the TFT device comprises an anchor layer and a device layer that are sequentially stacked; and a sacrificial layer is disposed between the TFT device and the first base, the anchor layer comprises a first body and a connecting portion that are connected, the first body is disposed on a side of the sacrificial layer away from the first base, one side of the connecting portion is connected to the first body, and an other side is connected to the first base;
removing the sacrificial layer of the TFT substrate, so that the TFT device is connected to the first base through the connecting portion of the anchor layer;
obtaining a first transfer substrate, selectively picking up the TFT devices on the TFT substrate using the first transfer substrate, and breaking the connecting portion of the anchor layer from the first body of the anchor layer in the TFT device that is picked up, to separate the TFT device with the first body from the first base of the TFT substrate;
obtaining a second transfer substrate, and transferring the TFT device with the first body that is picked up from the first transfer substrate to the second transfer substrate;
obtaining a circuit board, wherein the circuit board comprises a second base, and a TFT connection line and a light-emitting device connection line that are disposed on the second base, and transferring the TFT device on the second transfer substrate to the circuit board and connecting the TFT device to the TFT connection line; and
obtaining a light-emitting device, and transferring the light-emitting device to the circuit board and connecting the light-emitting device to the light-emitting device connection line, to prepare the display panel.
 
13. A display panel, comprising:
a circuit board, wherein the circuit board comprises a second base, and a thin film transistor (TFT) connection line and a light-emitting device connection line that are disposed on the second base;
a TFT device, disposed on the circuit board and connected to the TFT connection line, wherein the TFT device comprises a source and drain layer, an active layer, a gate insulation layer, a gate, and an anchor layer that are sequentially stacked on the circuit board, and the source and drain layer is connected to the TFT connection line; and
a light-emitting device, disposed on the circuit board and connected to the light-emitting device connection line;
wherein the TFT device is initially formed on a first base of a TFT substrate in a separate process from forming the TFT connection line and the light-emitting device connection line on the circuit board, and the TFT device is then subsequently transferred to the circuit board and connected to the TFT connection line; and
wherein thicknesses of the TFT connection line and the light-emitting device connection line are both greater than a thickness of the TFT device.