Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
2004-10-06
2008-10-28
Kim, Paul D (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S593000, C029S609100, C216S062000, C216S066000, C310S309000, C310S311000, C310S334000, C310S326000, C600S443000, C600S447000, C600S459000, C600S487000
Reexamination Certificate
active
07441321
ABSTRACT:
An 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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Baumgartner Charles E.
Lewandowski Robert S.
Mills David M.
Smith Lowell Scott
Wildes Douglas G.
Fletcher Yoder
General Electric Company
Kim Paul D
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