Patent ID: 11963382
Assignee: BOE TECHNOLOGY GROUP CO., LTD.
Field: nan (nan)
Classification: CPC H  Y | IPC H

Claim 11:
12. A preparation method of a display substrate, the display substrate comprising a display region and a binding region located at one side of the display region, the preparation method comprising:
forming a driving structure layer and a binding structure layer in the display region and the binding region respectively, wherein the driving structure layer comprises a pixel driving circuit, and the binding structure layer comprises a power line connected with the pixel driving circuit;
forming an organic insulating layer on the driving structure layer and the binding structure layer, wherein at least one isolation groove is formed on the organic insulating layer on the binding structure layer;
forming a light-emitting element and an isolation dam in the display region and the binding region respectively, wherein the light-emitting element is connected with the pixel driving circuit, and the distance between the isolation groove and an edge of the display region is smaller than the distance between the isolation dam and the edge of the display region; and
forming a composite encapsulation layer and an inorganic encapsulation layer in the display region and the binding region, respectively, wherein the inorganic encapsulation layer covers the isolation groove and wraps the isolation dam;
wherein the power line comprises a first power line and a second power line, and the isolation groove is disposed on the first power line; wherein along the direction of the edge of the display region, an orthographic projection of the isolation groove on a substrate comprises an orthographic projection of the first power line on the substrate; wherein a surface of the first power line is exposed in the isolation groove, and the encapsulation layer covers the exposed surface of the first power line in the isolation groove.