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

Claim 16:
17. A method comprising:
forming a trench within a first material on a first substrate;
placing the first substrate in a deposition chamber
while the first substrate is in the deposition chamber, depositing a second material in the trench, wherein the second material only partially fills the trench, wherein depositing the second material comprises:
forming a first monolayer of a first precursor material along sidewalls and at a bottom of the trench by flowing the first precursor material into the trench, wherein the first precursor material is completely chemically bonded to the sidewalls and the bottom of the trench to form the first monolayer;
partially removing the first monolayer along upper portions of the sidewalls of the trench by a chemical etching the first precursor material of the first monolayer; and
forming a second monolayer by flowing a second precursor material over a remaining portion of the first monolayer within the trench and reacting the second precursor material with the remaining first precursor material within the trench, wherein a portion of the second monolayer is formed by selectively reacting the second precursor material with the first precursor material that is on the bottom of the trench without reacting the second precursor material with the exposed upper portions of the sidewalls of the trench, and wherein the second material comprises the second monolayer; and
performing additional deposition cycles of sequentially flowing the first precursor material and the second precursor material until the second material reaches a predetermined height, wherein the second material is free of any voids encased therein;

removing the first substrate from the deposition chamber; and
after removing the first substrate from the deposition chamber, depositing a third material in an upper portion of the trench over the second material, wherein the third material is in direct physical contact with the second material, and wherein no etch back process is performed on the second material after removing the first substrate from the deposition chamber.