Patent ID: 11890140
Assignee: FUJIFILM SONOSITE, INC.
Field: Measurement (Instruments)
Classification: CPC A  B  G  H | IPC A  B  G  H

Claim 19:
20. A method to manufacture an ultrasound transducer assembly, comprising:
forming a piezoelectric layer comprising a plurality of piezoelectric transducer elements configured emit ultrasound energy;
forming a plurality of matching layers overlaying the piezoelectric layer, wherein a Z-axis extends through the plurality of matching layers and the piezoelectric layer; and
forming a plurality of first kerfs and a plurality of second kerfs extending into at least the plurality of matching layers, wherein the first kerfs have a first depth with respect to the Z-axis, wherein the second kerfs have a second depth with respect to the Z-axis, wherein the second depth is greater than the first depth, and wherein the kerfs are at least partially filled with a composite filler material comprising two or more materials, wherein the composite filler material has a graduated acoustical impedance with respect to the z-axis.