Patent ID: 11955318
Assignee: APPLIED MATERIALS, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C  G | IPC C  G  H

Claim 12:
13. A method for processing substrates, the method comprising:
exposing a passivation substrate having an exposed silicon-containing surface to an etching gas mixture comprising a chlorine-containing gas to form a silicon chloride residue on the exposed silicon-containing surface;
positioning the passivation substrate in a processing volume of a plasma processing chamber;
heating the passivation substrate to evaporate the silicon chloride residue from the exposed silicon-containing surface and deposit the silicon chloride residue on one or more interior chamber surfaces within the processing volume;
exposing the silicon chloride to an oxidizing environment to convert the silicon chloride residue to form a silicon oxide passivation layer over the one or more interior surfaces in the processing volume of the plasma processing chamber, and
ashing a layer from a production substrate in the processing volume of the processing chamber having the silicon oxide passivation layer on the one or more interior chamber surfaces.