Patent ID: 11903234
Assignee: BOE TECHNOLOGY GROUP CO., LTD.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 17:
18. The preparation method of claim 16, wherein forming the first barrier wall comprises:
forming a first metal material layer on a first side of a base substrate, and forming a second metal material layer on a side of the first metal material layer away from the base substrate;
performing a first etching process on the first metal material layer and the second metal material layer to form the electrode pattern and an initial barrier wall; and
performing a second etching process on the initial barrier wall to form the first barrier wall, wherein a wet etching method is adopted in the second etching process, and an etching rate produced by an etching solution used in the second etching process on the first metal material layer is larger than an etching rate produced by the etching solution on the second metal material layer, so that the recess is formed.