US 12,107,203 B2
Light-emitting substrate and display device
Song Liu, Beijing (CN); Zhengliang Li, Beijing (CN); Kun Zhao, Beijing (CN); Feifei Li, Beijing (CN); and Qi Qi, Beijing (CN)
Assigned to BOE Technology Group Co., Ltd., Beijing (CN)
Filed by BOE Technology Group Co., Ltd., Beijing (CN)
Filed on Sep. 2, 2021, as Appl. No. 17/465,689.
Claims priority of application No. 202110042527.0 (CN), filed on Jan. 13, 2021.
Prior Publication US 2022/0223773 A1, Jul. 14, 2022
Int. Cl. H01L 33/62 (2010.01); H01L 25/075 (2006.01); H01L 33/56 (2010.01)
CPC H01L 33/62 (2013.01) [H01L 25/0753 (2013.01); H01L 33/56 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A light-emitting substrate, comprising a base substrate, wherein the base substrate is provided with a light-emitting area, the light-emitting area comprises a plurality of first pads located above the base substrate, the plurality of first pads are configured to be in bonding connection to a plurality of light-emitting units;
any one of the plurality of first pads comprises: a first metal layer located above the base substrate, and a second metal layer located on a side, facing away from the base substrate, of the first metal layer;
a material of the first metal layer comprises copper, and a material of the second metal layer comprises copper-nickel-titanium alloy;
in at least two cross sections, parallel to a plane where the base substrate is located, of the second metal layer, a quantity of nickel atoms contained per unit area in a cross section farther from the base substrate is greater than a quantity of nickel atoms contained per unit area in another cross section closer to the base substrate;
and/or, a quantity of titanium atoms contained per unit area in the cross section farther from the base substrate is greater than a quantity of titanium atoms contained per unit area in the another cross section closer to the base substrate.