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Naji, M. |
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Motta, Antonella |
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Aletan, Dirar |
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Mohamed, Tarek |
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Ertürk, Emre |
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Taccardi, Nicola |
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Kononenko, Denys |
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Petrov, R. H. | Madrid |
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Alshaaer, Mazen | Brussels |
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Bih, L. |
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Casati, R. |
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Muller, Hermance |
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Kočí, Jan | Prague |
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Šuljagić, Marija |
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Kalteremidou, Kalliopi-Artemi | Brussels |
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Azam, Siraj |
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Ospanova, Alyiya |
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Blanpain, Bart |
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Ali, M. A. |
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Popa, V. |
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Rančić, M. |
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Ollier, Nadège |
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Azevedo, Nuno Monteiro |
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Landes, Michael |
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Rignanese, Gian-Marco |
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Carlson, James
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patent
Micromachined ultrasonic transducer with air-backed cavity and electrical connection
Abstract
A method and associated apparatus directed to a piezoelectric micromachined ultrasonic transducer (pMUT) defining an air-backed cavity are provided. A first via defined by a device substrate and associated dielectric layer, and extending to the first electrode, is substantially filled with a first conductive material. A support member engaged with the device substrate defines a second via extending to the first conductive material. The second via has a second conductive material disposed thereon, forms an electrically-conductive engagement with the first conductive material, and extends outwardly of the second via to be accessible externally to the support member. A connective element extends through a third via defined by a connection support substrate and is in electrically-conductive engagement with the second conductive material, wherein one of the connective element and connection support substrate is bonded to one of the support member and second conductive material by a bonding material engaged therebetween.