摘要:
A method for forming a graded matching layer structure is presented. The method includes (a) depositing a first material slurry on at least a portion of a substrate, (b) spreading the first material slurry to a form a first material layer having a first determined thickness, (c) exposing the first material layer using light processed through a determined light pattern mask to form a first matching layer, and (d) repeating steps (a)-(c) with different material slurries to form the graded matching layer structure.
摘要:
A method for forming a tileable detector array is presented. The method includes forming a detector module, where forming the detector module includes providing a sensor array having a first side and a second side, where the sensor array includes a first plurality of contact pads disposed on the second side of the sensor array, disposing the sensor array on an interconnect layer, where the interconnect layer includes a redistribution layer having a first side and a second side, where the redistribution layer includes a second plurality of contact pads disposed on the first side, an integrated circuit having a plurality of through vias disposed therethrough, where a first side of the integrated circuit is operationally coupled to the second side of the redistribution layer, where the sensor array is disposed on the interconnect layer such that the first plurality of contact pads on the second side of the sensor array are aligned with the second plurality of contact pads on the first side of the redistribution layer, operationally coupling the first plurality of contact pads on the second side of the sensor array to the second plurality of contact pads on the redistribution layer to form a sensor stack, coupling the sensor stack to a substrate to form the detector module, and tiling a plurality of detector modules on a second substrate to form the tileable detector array.
摘要:
An ultrasound system is provided for imaging an object. The ultrasound system includes an ultrasound probe for acquiring ultrasound data and a cooling subsystem for actively removing heat from the ultrasound probe. The cooling subsystem includes a pump disposed within a reservoir containing a coolant and configured to circulate the coolant through the ultrasound probe via a conduit.
摘要:
In fabricating a two-dimensional array transducer wherein individual preformed piezoelectric elements are manufactured separately in a high temperature ceramic firing process, a ceramic substrate is provided, having a surface with a plurality of electrodes thereon. A layer of dielectric material is formed on the substrate surface. Holes are formed in the dielectric material layer over the electrodes, defining cavities with metal pads at the bottoms. The individual preformed piezoelectric elements are then inserted into the holes; with one end of each element in contact with a corresponding one of the substrate electrodes. The holes are sized such that the piezoelectric elements are isolated from the dielectric layer. A ground plane conductor is then formed over the dielectric material layer and over the ends of the piezoelectric elements opposite the ends in contact with the piezoelectric elements, and is photolithographically patterned and may be etched to provide a "mesh" structure. The layer of dielectric material may then be removed to provide better isolation between the piezoelectric elements.
摘要:
A method for making a testable sensor assembly is provided. The method includes forming a first sensor array on a first substrate having a first side and a second side, wherein the first sensor array is formed on the first side of the first substrate, coupling a first semiconductor wafer having a first side and a second side to the first sensor array, wherein the first side of the first semiconductor wafer is coupled to the first sensor array, thinning one of the second side of the first substrate or the second side of the first semiconductor wafer, and testing the first sensor array to identify operational and non-operational units in the testable sensor assembly before integration of the sensor assembly with interface electronics.
摘要:
A method for making a testable sensor assembly is provided. The method includes forming a first sensor array on a first substrate having a first side and a second side, wherein the first sensor array is formed on the first side of the first substrate, coupling a first semiconductor wafer having a first side and a second side to the first sensor array, wherein the first side of the first semiconductor wafer is coupled to the first sensor array, thinning one of the second side of the first substrate or the second side of the first semiconductor wafer, and testing the first sensor array to identify operational and non-operational units in the testable sensor assembly before integration of the sensor assembly with interface electronics.
摘要:
The present invention relates to a method for making an integrated sensor comprising providing a sensor array fabricated on a top surface of a bulk silicon wafer having a top surface and a bottom surface, and comprising a plurality of sensors fabricated on the top surface of the bulk silicon wafer. The method further comprises coupling an SOI wafer to the top surface of the bulk silicon wafer, thinning the back surface of the bulk silicon wafer, coupling a plurality of integrated circuit die to the back surface of the bulk silicon wafer, and removing the SOI wafer from the top surface of the bulk silicon wafer.
摘要:
The reconfigurable ultrasound array disclosed herein is one that allows groups of subelements to be connected together dynamically so that the shape of the resulting element can be made to match the shape of the wave front. This can lead to improved performance and/or reduced channel count. Reconfigurability can be achieved using a switching network. A methodology and an algorithm are disclosed that allows the performance of this switching network to be improved by properly choosing the configuration of the switching network.
摘要:
A matching layer for ultrasound transducers has a gradient in impedance value from one surface to the other surface of the matching layer. The matching layer is composed of a plurality of sublayers made of composite materials and securely attached together and is disposed on the surface of the transducer element. The first sublayer adjacent to the transducer element has an impedance value less than or equal to that of the transducer element. The last sublayer adjacent to the target has an impedance value greater than or equal to that of the target. The impedance values of the sublayers decrease monotonically from the first to the last sublayer.
摘要:
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.