Patent ID: 6353206
Filing Date: 2002-03-05
Classification: H01J

Abstract:
A plasma system which is coupled to a high frequency power source and which is used to process a substrate, said plasma system comprising:a chamber defining an internal cavity in which a plasma is generated during operation; a pedestal within said cavity and on which the substrate rests during operation; a coil which during operation couples power from the power source into the plasma within the chamber, said coil having first and second terminals; a first capacitor, wherein said first terminal is coupled to a reference potential through said first capacitor; and a second capacitor, wherein said second terminal is coupled to the power source through said second capacitor, wherein the power source operates at a frequency of f, wherein said coil has an inductance of L when the plasma is present in the chamber, wherein said first and second capacitors have capacitances of C1 and C2, respectively, wherein the combination of the first and second capacitors and the coil forms a circuit characterized by a resonant frequency that is (2&pgr;)âˆ’1(LC)âˆ’Â½ where C is equal to: 1(C1)-1+(C2)-1,and wherein said resonant frequency is selected to be near f.