Patent ID: 8741098
Filing Date: 2014-06-03
Classification: H01J

Abstract:
1. A table for use in a plasma processing system, on which a substrate to be processed is placed, comprising: an electrically conductive member connectible to an RF generator to function as a first electrode for plasma formation or a first electrode for attracting ions present in plasma, a first dielectric layer having a first relative dielectric constant, formed on the electrically conductive member so that it covers the center of the upper surface of the electrically conductive member to make a high-frequency electric field to be applied to plasma via the substrate uniform, and an electrostatic chuck covering the first dielectric layer and the electrically conductive member for electrostatically holding the substrate to be processed wherein the electrostatic chuck includes wherein the first dielectric layer is separated from the second dielectric layer, wherein the first relative dielectric constant is lower than the second relative dielectric constant, wherein the diameter of the second dielectric layer is greater than the diameter of the first dielectric layer, wherein the second dielectric layer is formed so that it stretches from the position corresponding to the center of the substrate to the position corresponding to the edge of the substrate, and wherein the second electrode fulfills the following condition: where δ=(2/ωμσ) in which t is the thickness of the second electrode, δ, the skin depth of the second electrode for RF power supplied from the RF generator, f, the frequency of RF power supplied from the RF generator, π, circular constant, μ, the magnetic permeability of the second electrode, and ρ, the specific resistance of the second electrode.