Patent ID: 9039910
Filing Date: 2015-05-26
Classification: H01J,H01L

Abstract:
1. A method for controlling line width roughness of a photoresist layer disposed on a substrate comprising: after a photoresist layer has been patterned on a substrate to form openings, generating an electric field from a microwave power generator in a waveguide formed in a processing chamber having the substrate disposed therein, the waveguide having a first end closed by a dielectric window formed as a lid of the processing chamber and a second end facing the substrate, the window exposed to the substrate through the waveguide; supplying a gas mixture into the first end of waveguide, the gas mixture flowing through the waveguide toward the substrate to the patterned photoresist layer in an uninterrupted flow path; interacting the electric field perpendicularly with a magnetic field generated in the waveguide, wherein the electric field has an uninterrupted path between the first end and the second end of the waveguide; forming a plasma in the gas mixture toward the substrate; and trimming an edge profile of the patterned photoresist layer with the plasma formed in the processing chamber.