Mosaic arrays using micromachined ultrasound transducers
First Claim
1. A mosaic array comprising a multiplicity of subelements, a multiplicity of switches, each of said switches being connected to at least one of said subelements, and a programming circuit that controls said multiplicity of switches, each of said subelements comprising a respective multiplicity of micromachined ultrasound transducer (MUT) cells, and each NUT cell comprising a top electrode and a bottom electrode, wherein the top electrodes of the MUT cells making up any particular subelement are connected together by connections that are not switchably disconnectable, and the bottom electrodes of those same MUT cells are connected together by connections that are not switchably disconnectable, wherein said programming circuit controls said switches to form a first ring-shaped element comprising a first set of said subelements.
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Abstract
An ultrasound transducer array includes a multiplicity of subelements interconnected by a multiplicity of microelectronic switches, each subelement comprising a respective multiplicity of micromachined ultrasound transducer (MUT) cells. The MUT cells within a particular subelement are hard-wired together. The switches are used to configure the subelements to form multiple concentric annular elements. This design dramatically reduces complexity while enabling focusing in the elevation direction during ultrasonic image data acquisition.
162 Citations
24 Claims
- 1. A mosaic array comprising a multiplicity of subelements, a multiplicity of switches, each of said switches being connected to at least one of said subelements, and a programming circuit that controls said multiplicity of switches, each of said subelements comprising a respective multiplicity of micromachined ultrasound transducer (MUT) cells, and each NUT cell comprising a top electrode and a bottom electrode, wherein the top electrodes of the MUT cells making up any particular subelement are connected together by connections that are not switchably disconnectable, and the bottom electrodes of those same MUT cells are connected together by connections that are not switchably disconnectable, wherein said programming circuit controls said switches to form a first ring-shaped element comprising a first set of said subelements.
- 16. An ultrasound transducer array comprising a multiplicity of subelements interconnected by a multiplicity of microelectronic switches and programming means for interconnecting selected subelements to form respective ring-shaped elements, each ring-shaped element comprising a respective set of said subelements, each subelement comprising a respective multiplicity of MUT cells, and each MUT cell within a particular subelement being connected together by connections that are not switchably disconnectable.
Specification