Semi-Automated Packaging of Transducer Arrays for 3D Ultrasound Computer Tomography

A semi-automated packaging process for transducer array manufacturing is presented. As an major innovation, a transducer disc is integrated in a sandwich structure between a printed circuit board (PCB) and an acoustic matching layer. Each of the transducer discs contains 18 lead-zirconium-titanate (...

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Bibliographic Details
Main Authors: Angerer, Martin, Zapf, Michael, Leyrer, Benjamin, Ruiter, Nicole V.
Format: Conference Proceeding
Language:English
Subjects:
electro-mechanical impedance
Electromagnetic interference
Manufacturing
Packaging
PZT fibre composites
Three-dimensional displays
Tomography
transducer packaging
Transducers
Ultrasonic imaging
ultrasound computer tomography (USCT)
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Summary:A semi-automated packaging process for transducer array manufacturing is presented. As an major innovation, a transducer disc is integrated in a sandwich structure between a printed circuit board (PCB) and an acoustic matching layer. Each of the transducer discs contains 18 lead-zirconium-titanate (PZT) fibres embedded in epoxy. To interconnect the transducer array components, adhesive bonding and automatic pick-and-place processes were used. A pre-series was evaluated by measuring the electro-mechanical impedance (EMI) before and after the assembly. Statistical analysis showed consistent behaviour of the series resonance f s and the electro-mechanical coupling k eff before and after the packaging. This encouraged the manufacturing of 256 arrays. These arrays will now be integrated in an ultrasound computer tomography (USCT) system with 3D scanning aperture for breast cancer imaging. With this system, we intend to bridge the gap towards clinical use of full 3D USCT.
ISSN:2168-9229
DOI:10.1109/SENSORS47125.2020.9278720