Patent ID: 11942532
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A method of fabricating a semiconductor device, comprising:
depositing a coating layer on a first region and a second region under a loading condition such that a first portion in the first region and a second portion in the second region have a height difference, the first region having a first trench with a first upper portion and a first lower portion, the second region having a second trench with a second upper portion and a second lower portion, the first upper portion being wider than the first lower portion, the second upper portion being wider than the second lower portion; and
applying a deposition gas and an etch gas to the coating layer to remove an upper portion of the coating layer to reduce the height difference, and the coating layer is removed from the first and second upper portions, but not the first and second lower portions.