HIGH FREQUENCY PIEZOCOMPOSITE AND METHODS FOR MANUFACTURING SAME
First Claim
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1. A transducer, comprising:
- a substrate having a longitudinal axis;
a plurality of pillars extending outwardly therefrom the substrate, wherein the plurality of pillars forms an array of pillars positioned in adjacent rows, each row of the array of pillars extending substantially parallel to the longitudinal axis of the substrate;
a means for suppressing the lateral modes of the transducer at operating frequencies at or above 15 MHz, wherein the means for suppressing the lateral modes comprises each pillar having a triangular cross-sectional shape that has an apex, an opposed base having opposed edges, and a pair of side walls that extend from the apex to the respective edges of the base, wherein the array of pillars comprises a plurality of paired pillars, wherein each of the paired pillars comprises a first pillar positioned adjacent to a second pillar such that the base of the first pillar is spaced from and substantially opposes the base of the second pillar, and wherein each row of the array of pillars comprises a plurality of paired pillars that are positioned adjacent each other such that one side wall of the first pillar is spaced from and substantially opposes one side wall of the second pillar.
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Abstract
A transducer with triangular cross-sectional shaped pillars is described for suppressing lateral modes within a composite, and a method for producing the same. According to one aspect of the present application, a plurality of triangular cross-sectional shaped pillars extends outwardly from a substrate and form an array of pillars. The resulting array of pillars is configured to suppress the lateral modes of the transducer at higher operating frequencies, such as, at or above 15 MHz, at or above 20 MHz, or at or above 30 MHz.
5 Citations
20 Claims
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1. A transducer, comprising:
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a substrate having a longitudinal axis; a plurality of pillars extending outwardly therefrom the substrate, wherein the plurality of pillars forms an array of pillars positioned in adjacent rows, each row of the array of pillars extending substantially parallel to the longitudinal axis of the substrate; a means for suppressing the lateral modes of the transducer at operating frequencies at or above 15 MHz, wherein the means for suppressing the lateral modes comprises each pillar having a triangular cross-sectional shape that has an apex, an opposed base having opposed edges, and a pair of side walls that extend from the apex to the respective edges of the base, wherein the array of pillars comprises a plurality of paired pillars, wherein each of the paired pillars comprises a first pillar positioned adjacent to a second pillar such that the base of the first pillar is spaced from and substantially opposes the base of the second pillar, and wherein each row of the array of pillars comprises a plurality of paired pillars that are positioned adjacent each other such that one side wall of the first pillar is spaced from and substantially opposes one side wall of the second pillar. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of producing an ultrasonic wave emission pattern at operating frequencies at or above 15 MHz, comprising:
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applying an electric signal to a piezoelectric substrate of a transducer having a plurality of pillars extending outwardly therefrom the substrate, wherein the plurality of pillars forms an array of pillars positioned in adjacent rows, each row of the array of pillars extending substantially parallel to a longitudinal axis of the substrate; and suppressing the lateral modes of the transducer by providing each pillar with a triangular cross-sectional shape that has an apex, an opposed base having opposed edges, and a pair of side walls that extend from the apex to the respective edges of the base, wherein the array of pillars comprises a plurality of paired pillars, wherein each of the paired pillars comprises a first pillar positioned adjacent to a second pillar such that the base of the first pillar is spaced from and substantially opposes the base of the second pillar, and wherein each row of the array of pillars comprises a plurality of paired pillars that are positioned adjacent each other such that one side wall of the first pillar is spaced from and substantially opposes one side wall of the second pillar. - View Dependent Claims (14, 15, 16, 17)
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18. A transducer for emitting energy at operating frequencies at or above 15 MHz in response to an input signal, the transducer comprising:
a plurality of pillars for emitting energy in response to the input signal applied thereto, wherein the plurality of pillars are positioned in adjacent, substantially parallel rows, wherein each pillar has a triangular cross-sectional shape for suppressing the lateral modes at the operating frequencies, each pillar having an apex, an opposed base having opposed edges, and a pair of side walls that extend from the apex to the respective edges of the base, wherein the plurality of pillars comprises a plurality of paired pillars, wherein each of the paired pillars comprises a first pillar positioned adjacent to a second pillar such that the base of the first pillar is spaced from and substantially opposes the base of the second pillar, and wherein each row of the array of pillars comprises a plurality of paired pillars that are positioned adjacent each other such that one side wall of the first pillar is spaced from and substantially opposes one side wall of the second pillar. - View Dependent Claims (19, 20)
Specification