Patent ID: 7190103

Claim:
An apparatus, comprising: an RF power source to generate power signals at a megasonic frequency, the RF power source having a source impedance magnitude, and the power signals having a current waveform and a voltage waveform; an acoustic-wave transducer load to receive the power signals and produce acoustic cavitation at the megasonic frequency, the acoustic-wave transducer load having a load impedance magnitude different from the source impedance; and a matching circuit connected to the RF power source and the acoustic-wave transducer load, the matching circuit including an impedance-phase-adjusting capacitor connected in series with an impedance-magnitude-adjusting transformer, the impedance-magnitude-adjusting transformer to match the load impedance magnitude to the source impedance magnitude, and the impedance-phase-adjusting capacitor to match the phases of the current and voltage waveforms.