Patent ID: 11932934
Assignee: APPLIED MATERIALS, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC C  H | IPC C  H

Claim 0:
1. A physical vapor deposition method comprising:
depositing a film comprising carbon on a substrate surface in a magnetron physical vapor deposition chamber with a plasma at a deposition pressure and creating particles in the plasma, the magnetron physical vapor deposition chamber having a magnetron assembly comprising a rotatable drive shaft having a location that is aligned with a central axis of the chamber, the location of the rotatable drive shaft fixed with respect to the central axis of the chamber, a plurality of magnets that are coupled to a magnet support member connected to the rotatable drive shaft to rotate around the central axis, a first energy source comprising a first RF bias power source to provide RF power, to a carbon target at a first frequency, and a second energy source comprising a second RF bias power source to provide RF power to the carbon target at a second frequency, the second frequency different than the first frequency;
increasing pressure in the physical vapor deposition chamber to a particulate purge pressure greater than or equal to about 50 mtorr to move at least some of the particles to an outer portion of the physical vapor deposition chamber, wherein the substrate surface is biased while increasing the pressure to keep particles suspended in the plasma, wherein moving at least some of the particles comprises increasing the frequency of the bias applied to the substrate surface to create a charge on at least some of the particles to form charged particles, and increasing the frequency creates a trapping force that decreases an amount of time for the charged particles to discharge; and
extinguishing the plasma.