Patent ID: 6791242
Filing Date: 2004-09-14
Classification: B08B,G10K,H04R

Abstract:
A transducer comprising:an acoustic energy generating means for generating acoustic energy in the frequency range of 0.4 to 2.0 MHz, the acoustic energy generating means being adapted for delivering an approximately uniform amount of acoustic energy in a given time period to each unit of surface area on a particular surface of a substrate to be exposed to the acoustic energy when a relative rotational motion about an axis of rotation exists between the substrate and the transducer, the acoustic energy generating means including a design feature that corrects for the increase in linear velocity of points on the particular surface with increasing distance from the axis of rotation, the acoustic energy generating means overlaying less than 100% of the particular surface; and a resonator attached to the acoustic energy generating means for transmitting the acoustic energy to the substrate.