Patent ID: 6036785
Filing Date: 2000-03-14
Classification: B08B,B24C,H01L

Abstract:
A method for removing chemical residues and accumulations of particles from an exposed surface of a solid object, the method comprising the steps of:directing a slurry, which includes slurry liquid and includes scrubber particles having particle sizes lying in a selected range of sizes, against at least one exposed surface of an object having chemical residues or particle accumulations on the at least one exposed surface, to remove most or all of the residues and accumulations from the at least one exposed surface;partly or fully submerging the at least one exposed surface in a rinse liquid that includes a strong base or a strong oxidizer; andsubjecting the rinse liquid to ultrasonic waves with at least one selected wave displacement direction for a selected first time interval, where the ultrasonic waves have at least a selected first wavelength that is no greater than smallest expected size of a scrubber particle or other residue to be removed, to remove chemical residues, particle accumulations and scrubber particles that are on or adjacent to the at least one exposed surface.