Patent ID: 6112697
Filing Date: 2000-09-05
Classification: H01J

Abstract:
A plasma enhanced chemical vapor deposition (PECVD) reactor comprising:a processing chamber;a first electrode within the chamber, the first electrode being a shower head electrode configured to introduce reactants into the reactor;a second electrode within the chamber and configured for supporting at least one semiconductor workpiece for processing, the first and second electrodes defining respective plates of a parallel plate PECVD reactor and constituting the only reactor electrodes which are capable of being powered;a first RF power source associated with the chamber and operatively connected with the first electrode to deliver RF power of a first frequency, the first RF power source providing a first RF frequency power loop; anda second RF power source associated with the chamber and operatively connected with the second electrode to deliver RF power of a second frequency which is different from the first frequency, wherein:the chamber includes a chamber interior at least a portion of which is grounded;the second RF power source is connected with the second electrode via a power line a portion of which is disposed inside the chamber; and further comprising:a grounding path for the first RF frequency loop inside the chamber, the grounding path comprising at least a portion of the power line which is disposed inside the chamber, the grounding path further comprising only one band pass filter for passing only frequencies developed bv the first RF power source.