Abstract:
Aspects of the present disclosure provide an apparatus, which includes first gas channels distributing a first process gas and second gas channels alternating with the first gas channels and distributing a second process gas. The apparatus further includes first feed tubes each including first outlets configured to deliver the first process gas to a row of the first gas channels via the first outlets along different first flow paths of a same first length, and second feed tubes each including second outlets corresponding to a row of the second gas channels and configured to deliver the second process gas to the row of the second gas channels via the second outlets along different second flow paths of a same second length. The apparatus further includes vertical gas conduits each vertically extending from a respective one of the array of gas channels configured to transmit the first or second process gas.
Abstract:
Embodiments include a method for controlled cooling of a heated stage. The method includes setting a stage coupling to a maximum value and heating the stage to a process temperature. The method includes providing a wafer on the heated stage in a process chamber. The method includes performing a process on the wafer and reducing the heating stage coupling to a predetermined minimum value and reducing the heated stage temperature. The method includes removing the wafer from the heated stage and the process chamber. The heated stage is covered with a plurality of pixels, each pixel of the plurality of pixels include a level of emissivity and are equipped with an emissivity control device configured to independently adjust the level of emissivity of the pixel. The heated stage coupling is configured to achieve a predetermined radiative coupling and control the wafer cooling rate and target temperature.