Patent ID: 9202675
Filing Date: 2015-12-01
Classification: H01J

Abstract:
1. A plasma processing apparatus comprising: a processing chamber in which a target object is processed by a plasma; a first and a second electrode that are provided in the processing chamber to face each other and wherein a processing space is between the first and second electrodes; and a high frequency power source that is connected to one of the first and the second electrodes to supply a high frequency power to the processing chamber, wherein at least one electrode of the first and the second electrodes includes: (a) a base formed of a plate-shaped dielectric material; (b) a resistor formed of a metal and provided between the base and the processing space, wherein the resistor includes a plurality of members that are each located at a position at which a high frequency electric field strength is to be lowered, and wherein the plurality of members are configured to reduce a degree of variation in high frequency electric field distribution on a plasma-facing side of the at least one electrode by converting, at each of the positions of the plurality of members, a current from the high frequency power to heat in order to lower the high frequency electric field strength at those positions; and (c) an additional resistor formed of a metal and located between the base and the processing space, wherein the additional resistor has a sheet resistance that causes a potential difference to occur between a central position of the additional resistor and an end position of the additional resistor when the current flows along the additional resistor, and wherein the sheet resistance of the additional resistor is in a range from about 20 Ω/□ to about 2000 Ω/□, and wherein the resistor and the additional resistor are located on two different vertical planes of the same electrode.