Patent ID: 7981472
Filing Date: 2011-07-19
Classification: C23C

Abstract:
1. A method for introducing gases into a reactor, comprising during a first time interval flowing a purge gas into the reactor from a first gas source orifice array disposed a first distance from a surface of a work-piece along an axis defined by gas flow from the first gas source orifice array to the surface of the work-piece while flowing a first reactive precursor into the reactor from a second gas source orifice array separate from and not fluidly coupled to the first gas source orifice array and disposed at a second distance from the surface of a work-piece along the axis defined by gas flow, said second distance being less than said first distance; during a second time interval, flowing the purge gas into the reactor from both the first and second gas source orifice arrays while evacuating the reactor; during a third time interval, flowing a second reactive precursor into the reactor through the first gas source orifice array while flowing the purge gas into the reactor through the second gas source orifice array; and during a fourth time interval, flowing the purge gas into the reactor from both the first and second gas source orifice arrays while evacuating the reactor.