Patent ID: 6998014

Claim:
A substrate processing chamber, comprising: a top shower plate, wherein the top shower plate comprises holes in communication with a top surface and a bottom surface of the top shower plate; a bottom shower plate, wherein the bottom shower plate comprises columns having column holes in communication with a top surface and a bottom surface of the bottom shower plate and comprises grooves having groove holes in communication with the bottom surface of the bottom shower plate; an insulator disposed between the top shower plate and the bottom shower plate; a gas box having a first gas channel; a gas conduit coupled to the first gas channel of the gas box, disposed through an aperture of the top shower plate, and coupled to an aperture of the bottom shower plate, the aperture of the bottom shower plate in communication with the grooves of the bottom shower plate, wherein the gas conduit comprises an insulating material; a power source coupled to the top shower plate; and a controller adapted to control the power source to provide pulses of power to the top shower plate.