Patent ID: 11955370
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method, comprising:
depositing a material layer in a trench by performing a plurality of deposition cycles until the material layer completely fills the trench, wherein after the material layer completely fills the trench, the material layer is free of any voids disposed therein, and wherein a first deposition cycle of the plurality of deposition cycles comprises:
introducing a first precursor into the trench such that portions of the first precursor react with sidewalls and a bottom surface of the trench to form a first precursor product;
etching the first precursor product to expose upper portions of the sidewalls of the trench, wherein the etching leaves the first precursor product on the bottom surface of the trench intact, and wherein the etching utilizes a chemical reaction; and
introducing a second precursor into the trench, such that portions of the second precursor react with the first precursor product to from a material layer on the bottom surface and lower portions of the sidewalls of the trench, wherein the second precursor does not react with the upper portions of the sidewalls of the trench that have been exposed by etching the first precursor product such that the material layer is not formed on the upper portions of the sidewalls of the trench.