Patent ID: 7556697

Claim:
A method of processing one or more microelectronic substrates, the method comprising the steps of: positioning one or more microelectronic substrates in a process chamber; dispensing a first liquid flow into the process chamber and onto the one or more substrates via a first fluid delivery pathway; dispensing a second liquid flow into the process chamber and onto the one or more substrates via a second fluid delivery pathway, wherein the first fluid delivery pathway and the second fluid delivery pathway are not the same fluid delivery pathway; stopping dispensing of the first liquid flow, wherein an amount of residual liquid remains in the first fluid delivery pathway; while the dispensing of the second liquid flow is occurring, purging the first fluid delivery pathway into the process chamber; after stopping purging of the first fluid delivery pathway, stopping the dispensing of the second liquid flow, wherein a residual amount of liquid remains in the second fluid delivery pathway; and removing at least a portion of the residual amount of liquid in the second fluid delivery pathway through a fluid removal pathway such that said portion of the residual amount of liquid in the second fluid delivery pathway is not purged onto the one or more microelectronic substrates.