High-frequency ultrasonic cleaning is widely used in the semiconductor and other industries affected by contamination for the removal of particulate contamination. High frequency (near 1 MHz) ultrasonic cleaning (known as megasonic cleaning) is specially used in semiconductor manufacturing [1]. Many studies concerning submicron particle removal using megasonic and ultrasonic cleaning has been conducted recently [2–7]. The megsonic cleaning process proved to be the essential processes in cleaning silicon wafers after processes such as CMP, RIE, CVD, Sputter, etc. This paper introduces recent results that involve new techniques for introducing the ultrasonic energy in the cleaning bath.

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