Patent ID: 9119282
Filing Date: 2015-08-25
Classification: H05H

Abstract:
1. A plasma processing apparatus, comprising: a processing chamber having a dielectric window; a substrate holding unit for holding thereon a processing target substrate within the processing chamber; a processing gas supply unit configured to supply a processing gas into the processing chamber in order to perform a plasma process on the processing target substrate; an RF antenna provided outside the dielectric window and configured to generate plasma of the processing gas within the processing chamber by inductive coupling; and a high frequency power supply unit configured to supply a high frequency power having a frequency for generating a high frequency electric discharge of the processing gas to the RF antenna, wherein the RF antenna includes an inner coil and an outer coil with a gap therebetween in a radial direction, and the inner coil and the outer coil are electrically connected in parallel to each other between a first node and a second node on high frequency transmission lines of the high frequency power supply unit, wherein the intermediate coil is coiled oppositely to both the inner coil and the outer coil such that wherein the inner coil and the outer coil are coiled oppositely such that when traveling along each of the inner coil and the outer coil from the first node to the second node via the high frequency transmission lines, a circumferential traveling direction along the inner coil from the first node to the second node is opposite to a circumferential traveling direction along the outer coil from the first node to the second node, a first capacitor electrically connected in series with one coil of the inner coil and the outer coil is provided between the first node and the second node, a direction of current flowing in the inner coil is identical to a direction of a current flowing in the outer coil in a circumferential direction.