US 12,250,863 B2
OLED display panel and OLED display device
Lei Zhang, Beijing (CN); Daqing Sun, Beijing (CN); Wei Qiu, Beijing (CN); and Fangliang Yan, Beijing (CN)
Assigned to MIANYANG BOE OPTOELECTRONICS TECHNOLOGY CO., LTD, Sichuan (CN); and BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Filed by Mianyang BOE Optoelectronics Technology Co., Ltd., Sichuan (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
Filed on Apr. 26, 2022, as Appl. No. 17/729,695.
Application 17/729,695 is a continuation in part of application No. 16/771,261, granted, now 11,335,625, previously published as PCT/CN2019/125656, filed on Dec. 16, 2019.
Claims priority of application No. 201910098927.6 (CN), filed on Jan. 31, 2019.
Prior Publication US 2022/0254838 A1, Aug. 11, 2022
Int. Cl. H01L 27/32 (2006.01); H10K 59/40 (2023.01)
CPC H10K 59/40 (2023.02) 20 Claims
OG exemplary drawing
 
1. An OLED display panel, comprising a base substrate, a display function layer, a touch layer and a cover plate that are sequentially laminated on the base substrate, wherein the touch layer comprises a via hole structure, and the via hole structure comprises:
a first conductive layer, an interlayer insulating layer, and a second conductive layer that are sequentially arranged, wherein the interlayer insulating layer is provided with a via hole, the second conductive layer is overlapped with the first conductive layer by the via hole, and at least part of a surface, in contact with the second conductive layer, of the interlayer insulating layer is uneven;
wherein the uneven surface has a roughness in a value range of 0.05d≤r≤0.19d, where r represents the roughness, and d represents a thickness of the interlayer insulating layer, the roughness of the uneven surface being a distance between a top of convex and a bottom of concave in the uneven surface.