Backing material for micromachined ultrasonic transducer devices
First Claim
1. A micromachined ultrasonic transducer device comprising:
- an ultrasonic transducer array micromachined on or in a substrate;
electrical connections connected to said ultrasonic transducer array; and
a body of acoustically attenuative material that supports said substrate and said electrical connections.
1 Assignment
0 Petitions
Accused Products
Abstract
RD-28,709 22An ultrasonic transducer device comprising: an ultrasonic transducer array micromachined on a substrate; flexible electrical connections connected to the transducer array; and a body of acoustically attenuative material that supports the substrate and the flexible electrical connections. The acoustic backing material may contain additional features, such as tabs or notches, for use in positioning the transducer on fixtures during manufacturing or positioning the transducer within a housing during final assembly. Tabs or other features that are used only during manufacturing may be subsequently removed from the device. The MUT device itself may also be thinned so as to provide flexibility as desired. The backing material is preferably matched in acoustic impedance to the silicon wafer so as to prevent reflection at the interface of any acoustic energy propagating rearward, i.e., in the direction away from the device front surface. The backing material may also possess a high thermal conductivity to assist in removal of heat from the device.
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Citations
22 Claims
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1. A micromachined ultrasonic transducer device comprising:
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an ultrasonic transducer array micromachined on or in a substrate;
electrical connections connected to said ultrasonic transducer array; and
a body of acoustically attenuative material that supports said substrate and said electrical connections. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22)
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20. A micromachined ultrasonic transducer device comprising:
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an ultrasonic transducer array micromachined on or in a generally rectangular substrate;
electrical connections connected to said ultrasonic transducer array; and
a body of acoustically attenuative material that supports said substrate and said electrical connections and extends beyond opposing sides of said substrate.
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Specification