Patent ID: 7264698

Claim:
A reactor apparatus for electrochemical processing of microelectronic workpieces, comprising: a reaction vessel; a first outlet configured to introduce a primary flow of a first processing solution into the reaction vessel; at least one second outlet configured to introduce a secondary flow of a second processing solution different than the first processing solution into the reaction vessel separate from the primary flow; a dielectric field shaping unit in the reaction vessel to receive the secondary flow from the second outlet, the field shaping unit being configured to contain the secondary flow separate from the primary flow through at least a portion of the reaction vessel, and the field shaping unit having at least one electrode compartment through which the secondary flow can pass while the secondary flow is separate from the primary how; an electrode in the electrode compartment; and an ion-membrane carried by the field shaping unit downstream from the electrode, the ion-membrane being in fluid communication with the second flow in the electrode compartment, and the ion-membrane being configured to be at least substantially impermeable to fluids of the secondary flow and the primary flow.