Patent ID: 7503830
Filing Date: 2009-03-17
Classification: B24B,C23C,C25D,H01L

Abstract:
1. A system for delivering a degassed process solution to at least one process unit for processing a layer on a workpiece, comprising: a holding tank for holding a process solution; a plurality of process units coupled to the holding tank configured to receive the process solution from the holding tank; a degasser coupled to the holding tank configured to receive the process solution from the holding tank without passing the process solution through the process units and provide the degassed process solution to the holding tank without passing the process solution through the process units; and a monitor unit coupled to the degasser and configured to maintain a dissolved gas content in the degassed process solution at or below a predetermined amount, and wherein the system further comprises a controller to separately control a flow of the process solution through the degasser from a flow of the process solution through the process units.