Patent ID: 11895922
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 12:
13. An etching method for forming a vertical structure, the etching method comprising:
positioning a mask on a substrate, the mask comprising an opening pattern and a compensation pattern, the compensation pattern being disposed at a corner of two adjacent sides of the opening pattern, and comprising a concave compensation pattern that is indented from one of the two adjacent sides; and
forming the vertical structure on the substrate through the opening pattern of the mask by a dry etching process,
wherein the opening pattern of the mask comprises a plurality of steps, and
the concave compensation pattern is formed in at least one step of the plurality of steps to extend from the at least one step or to be indented from the at least one step.