Nextgen wet process tank

A process tank for processing a plurality of wafers having a diameter, the process tank comprising: two substantially vertical side walls being a first distance apart; wherein the first distance is substantially equal to the diameter of the wafer; two upwardly angled walls positioned between the side walls; a first transducer array coupled to a first of the upwardly angled walls, the first transducer array extending a length less than the diameter of the wafer; and a second transducer array coupled to a second of the upwardly angled walls, the second transducer array extending a length less than the diameter of the wafer. It is preferred that the process tank further comprise a fluid inlet positioned between the upwardly angled walls. In another aspect, the invention is a method of processing wafers comprising: filling the process tank described above with a wafer processing liquid through the tank inlet; submerging a wafer carrier holding a plurality wafers into the tank; and applying megasonic energy to the liquid through the first and second transducer arrays for a predetermined time and in a predetermined pattern.