Patent ID: 6540838
Filing Date: 2003-04-01
Classification: C23C,H01L

Abstract:
A coating system, comprising:a coating chamber having a support for a substrate to be coated; a gas distribution apparatus within the coating chamber; a gas sourcing and pulsing apparatus producing alternating pulses of at least first and second gases; a treatment apparatus connected to and accepting gases from the gas sourcing and pulsing apparatus, said treatment apparatus forming into radicals at least of a portion of the gases received; and a pre-reactor apparatus connected to both the treatment apparatus and the gas distribution apparatus, and having an energy provision system; characterized in that, after a pulse of a first gas, and prior to a pulse of a second gas, the pre-reactor apparatus, through the energy provision system, causes trace amounts of the first gas to coat on surfaces of the pre-reactor apparatus, preventing said trace amounts from existing in the coating chamber as the second gas is pulsed.