Patent ID: 11862458
Assignee: APPLIED MATERIALS, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A processing method comprising:
forming a plasma of a silicon-containing precursor, wherein the plasma of the silicon-containing precursor is formed at a first power level from a plasma power source;
depositing a film on a semiconductor substrate with plasma effluents of the silicon-containing precursor, wherein the film comprises amorphous silicon, wherein the semiconductor substrate is housed in a processing region of a semiconductor processing chamber, wherein the semiconductor substrate defines a feature within the semiconductor substrate, wherein the processing region is at least partially defined between a faceplate and a substrate support on which the semiconductor substrate is seated, and wherein a bias power is applied to the substrate support from a bias power source;
forming a plasma of a hydrogen-containing precursor within the processing region of the semiconductor processing chamber, wherein the plasma of the hydrogen-containing precursor is formed at a second power level from the plasma power source, and wherein a bias power is applied to the substrate support from the bias power source at a third power level greater than the second power level; and
etching the film from a sidewall of the feature within the semiconductor substrate with plasma effluents of the hydrogen-containing precursor.