Patent ID: 9184028
Filing Date: 2015-11-10
Classification: H01J,H01L

Abstract:
1. A semiconductor wafer processing apparatus, comprising: a first electrode exposed to a first plasma generation volume, the first electrode defined to transmit radiofrequency (RF) power to the first plasma generation volume, the first electrode further defined to distribute a first plasma process gas to the first plasma generation volume; a second electrode exposed to a second plasma generation volume, the second electrode defined to transmit RF power to the second plasma generation volume, the second electrode further defined to hold a substrate in exposure to the second plasma generation volume; a gas distribution unit disposed between the first plasma generation volume and the second plasma generation volume, the gas distribution unit defined to include an arrangement of through-holes that each extend through the gas distribution unit to fluidly connect the first plasma generation volume to the second plasma generation volume, the gas distribution unit further defined to include interior gas supply channels fluidly connected to an arrangement of gas supply ports defined to distribute a second plasma process gas to the second plasma generation volume, wherein the gas distribution unit includes embedded electrodes defined around the through-holes and around portions of the gas supply ports and below horizontal portions of the interior gas supply channels, each of the embedded electrodes defined to connect with any one of one or more direct current bias sources external to the gas distribution unit; and an exhaust channel configured to circumscribe the first plasma generation volume outside of a radial periphery of the first electrode and outside of a radial periphery of the gas distribution unit.