Abstract: There is provided an ultrasonic transducer having a sample-contacting portion and a back portion, the back portion being opposed to the sample contacting portion. The transducer includes a piezoelectric material configured to be in acoustic communication with a sample and a backing structure in acoustic communication with the piezoelectric material. The backing structure is configured to reflect acoustic energy towards the sample-contacting portion and away from the back portion of the ultrasonic transducer. The backing structure includes a low acoustic impedance layer and a high acoustic impedance layer. The transducer may also include a second dual layer de-matching backing. The second dual layer de-matching backing includes a second low acoustic impedance layer and a second high acoustic impedance layer.
Type:
Application
Filed:
November 17, 2020
Publication date:
January 18, 2024
Applicant:
RESONANT ACOUSTICS INTERNATIONAL INC.
Inventors:
Nicholas Chris CHAGGARES, Varak KALIAN, Eric RIEDER
Abstract: There are provided an ultrasonic transducer and methods for designing and manufacturing the same. The ultrasonic transducer includes a piezoelectric composite layer configured to be in acoustic communication with a sample and having at least partially decoupled acoustic impedance and electrical impedance properties. The piezoelectric composite layer includes an array of spaced-apart piezoelectric regions, each being made from a piezoelectric material, a filler material positioned between adjacent spaced-apart piezoelectric regions, the filler material comprising a polymer matrix and a non-piezoelectric material in contact with the polymer matrix.
Type:
Application
Filed:
June 2, 2023
Publication date:
September 28, 2023
Applicant:
RESONANT ACOUSTICS INTERNATIONAL INC.
Inventors:
Nicholas Chris Chaggares, Eric M. Rieder, Khachic Karshafian
Abstract: There are provided an ultrasonic transducer and methods for designing and manufacturing the same. The ultrasonic transducer includes a piezoelectric composite layer configured to be in acoustic communication with a sample and having at least partially decoupled acoustic impedance and electrical impedance properties. The piezoelectric composite layer includes an array of spaced-apart piezoelectric regions, each being made from a piezoelectric material, a filler material positioned between adjacent spaced-apart piezoelectric regions, the filler material comprising a polymer matrix and a non-piezoelectric material in contact with the polymer matrix.
Type:
Grant
Filed:
July 31, 2019
Date of Patent:
July 18, 2023
Assignee:
RESONANT ACOUSTICS INTERNATIONAL INC.
Inventors:
Nicholas Chris Chaggares, Eric M. Rieder, Khachic Karshafian
Abstract: There are provided an ultrasonic transducer and methods for designing and manufacturing the same. The ultrasonic transducer includes a piezoelectric composite layer configured to be in acoustic communication with a sample and having at least partially decoupled acoustic impedance and electrical impedance properties. The piezoelectric composite layer includes an array of spaced-apart piezoelectric regions, each being made from a piezoelectric material, a filler material positioned between adjacent spaced-apart piezoelectric regions, the filler material comprising a polymer matrix and a non-piezoelectric material in contact with the polymer matrix.
Type:
Application
Filed:
July 31, 2019
Publication date:
February 6, 2020
Applicant:
Resonant Acoustics International Inc.
Inventors:
Nicholas Chris Chaggares, Eric M. Rieder, Khachic Karshafian