Patent ID: 7938131

Claim:
A system for processing substrates comprising: a rotatable support for supporting and rotating a substrate about a rotational center-point; a liquid dispensing apparatus comprising a body with a substantially dome-shaped outer surface, a first angled conduit terminating as a first hole in the outer surface of the body and a second conduit terminating as a second hole in the outer surface of the body; and wherein the first hole is offset a radial distance from the rotational center-point of the substrate, the first angled conduit oriented to eject liquid out of the first hole into contact with the surface of the substrate at or near the rotational center-point, the second conduit oriented and positioned to eject liquid out of the second hole into contact with the surface of the substrate at a first radial distance from the rotational center-point; a first header and a second header; the first and second conduits forming a first array of conduits fluidly coupled to the first header; a second array of conduits fluidly coupled to the second header; the outer surface of the body comprising a longitudinal center-line; the first and second holes located on one side of the longitudinal center-line and the second array of the conduits terminating in holes in the outer surface of the body located on the other side of the longitudinal center-line; and wherein the conduits of the first and second arrays are positioned and oriented to eject liquid into contact with the surface of the substrate at locations intersected by a longitudinal center plane of the body.