Patent ID: 7357840

Claim:
A semiconductor substrate processing apparatus, comprising: a frame; a substrate support mounted to the frame to support a semiconductor substrate; a dispense head, having at least one outlet opening, connected to the frame for movement relative to the semiconductor substrate; a solvent bath attached to the frame having a reservoir and a drain, the reservoir holding a first fluid, the solvent bath shaped such that when the dispense head is in a selected position in the solvent bath, a second fluid dispensed from the at least one outlet opening enters the drain without mixing with the first fluid in the reservoir, while the at least one outlet opening is exposed to air saturated with vapor of the first fluid in the reservoir, wherein the solvent bath includes a recess for the dispense head to engage the solvent bath such that a fit of the dispense head into the recess substantially seals the solvent bath such that only a minimal amount of the saturated air escapes therethrough, wherein the dispense head is moveable between a first position and a second position relative to the semiconductor substrate, wherein when the dispense head is in the first position the second fluid dispensed from the at least one outlet opening flows onto the semiconductor substrate and the second position is the selected position, wherein the dispense head further comprises at least one nozzle, the at least one outlet opening being at an end thereof; and wherein the solvent bath further comprises a casing having a chamber therein and an opening connected to the chamber and sized to fit the at least one nozzle of the dispense head, wherein the recess helps guide the dispense head into position, when the dispense head is slightly misaligned in the second position, without a tip of the at least one nozzle of the dispense head contacting the opening in the casing sized to fit the at least one nozzle of the dispense head.