ULTRASONIC TRANSDUCER AND MANUFACTURING METHOD THEREFOR
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United States of America Patent
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Oct 6, 2016
app pub date -
Nov 6, 2013
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Nov 6, 2013
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Abstract
An ultrasonic transducer and a manufacturing method therefor are disclosed. The ultrasonic transducer, according to one embodiment of the present invention, comprises: an ultrasonic transducer body generating ultrasonic waves by using an active element to externally irradiate the ultrasonic waves through a lens part, and receiving reflected waves of the externally irradiated ultrasonic waves to convert the reflected waves into electrical signals; and a backing block joined to the opposite side of at least the lens part of the ultrasonic transducer body so as to attenuate the ultrasonic waves. According to one embodiment of the present invention, a backing material of the backing block is composed of a damping grease mixture. The damping grease mixture can be a material in which metal powder is mixed as a filler by using the damping grease as a dispersion medium. For example, the damping grease can be a mixture in which polytetrafluoroethylene (PTFE) is mixed as a viscosity increasing agent. The metal powder can contain at least one of tungsten (W), manganese (Mn), lead (Pb), and zinc oxide (ZnO).
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