Patent ID: 11942332
Assignee: APPLIED MATERIALS, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. A method of removing a metal-containing layer from a substrate, comprising:
generating a first plasma in a process volume of a plasma chamber, wherein
a patterned device is disposed on a substrate support in the process volume, the patterned device comprising:
a patterned region and an unpatterned region;
a substrate;
a metal-containing layer formed over the substrate; and
a supporting layer disposed between the metal-containing layer and the substrate;

depositing a first film over the patterned region of the metal-containing layer with the first plasma, wherein a first electrical bias is provided to an electrode in the substrate support during the generating of the first plasma;
removing portions of the unpatterned region of the metal-containing layer with the first plasma without depositing the first film over the unpatterned region;
changing the electrical bias provided to the electrode from the first electrical bias to a second electrical bias to generate a second plasma in the process volume of the plasma chamber after generating the first plasma, the second electrical bias having one or more different electrical characteristics relative to the first electrical bias; and
removing the first film and portions of the patterned region and the unpatterned region of the metal-containing layer with the second plasma.