Patent ID: 6262946
Filing Date: 2001-07-17
Classification: B06B,G10K

Abstract:
A capacitive micromachined ultrasonic transducer array comprising a plurality of spaced transducer elements, each including at least one membrane formed on a substrate,said substrate having a thickness such that the critical angle of plate waves exceeds the desired acceptance angle of the ultrasonic transducer array elements to minimize the excitation and propagation of plate waves and to minimize the interaction of transducer elements with each other through the plate waves or ultrasonic waves propagating at the interface between the transducer array surface and the immersion fluid, andsaid membrane and its attachment to the substrate configured to minimize the excitation of plate waves and to minimize the interaction of transducer elements through the plate waves or ultrasonic waves propagating at the interface between the transducer array surface and the immersion fluid.