Patent ID: 7850779

Claim:
A lid assembly for conducting a vapor deposition process within a process chamber, comprising: a plasma screen having an upper surface with an inner region and an outer region, and an outer trough formed in the upper surface, the outer trough encompassing an inner region; and an insulation cap positioned above the upper surface of the plasma screen and having a first channel configured to flow a first process gas therethrough and a second channel configured to flow a second process gas, the plasma screen and the insulation cap are coupled together to form an annular gas channel therebetween, the annular gas channel extending between a portion of the outer trough and a groove formed in a lower surface of the insulation cap and encompassing the inner region, and the second channel extending through the insulation cap to the groove within the lower surface of the insulation cap; wherein a first plurality of openings extend through the inner region of the plasma screen and direct the first process gas from above the upper surface of the plasma screen to below a lower surface of the plasma screen; and wherein a second plurality of openings extend radially outward from the annular gas channel to horizontally flow the second process gas from the annular gas channel, and the second plurality of openings are defined by the lower surface of the insulation cap and a plurality of radially extending slots traverse the upper surface of the plasma screen in the outer region of the plasma screen.