Patent ID: 8297224
Filing Date: 2012-10-30
Classification: C23C,H01J

Abstract:
1. A substrate processing apparatus, comprising: a process chamber configured to accommodate loaded substrates; a gas supply system configured to supply a process gas to the substrates; a pair of electrodes arranged in a stacked direction of the substrates; a high-frequency power source configured to supply a high-frequency power to the pair of the electrodes to generate plasma by exciting the process gas; a variable impedance element connected to a front end of the pair of the electrodes opposite to the high-frequency power source, the variable impedance element comprising a parallel resonance including a coil and a variable condenser arranged in parallel, both ends of the variable impedance element being connected to the pair of the electrodes in series; a control unit configured to change an output frequency of the high-frequency power source; a pair of protecting pipes having upper ends closed, and disposed to cover the pair of the electrodes; and a mounting pipe air-tightly sealed between the pair of the protecting pipes, wherein the variable impedance element is disposed inside the mounting pipe.