Patent ID: 7621028

Claim:
A method for manufacturing an acoustical stack for use within an ultrasound transducer, comprising: using a user defined center operating frequency of the ultrasound transducer, the center operating frequency being at least about 2.9 MHz; and joining a piezoelectric material and a dematching material with an assembly material to form an acoustical connection there-between, the piezoelectric material having a first acoustical impedance and at least one of an associated piezoelectric rugosity (Ra) and piezoelectric waviness (Wa), the dematching material having a second acoustical impedance that is different than the first acoustical impedance and at least one of an associated dematching Ra and dematching Wa, the piezoelectric and dematching materials having an impedance ratio of at least 2, the assembly material having a thickness that is based on the center operating frequency and at least one of the piezoelectric Ra, piezoelectric Wa, dematching Ra and dematching Wa.