Polymeric capacitive transducers and arrays for gas coupled operation

Richard O'Leary, Gerald Harvey

Research output: Contribution to conferencePaper

Abstract

This paper describes a facile approach for the manufacture of capacitive transducers based on micropatterning of polymer substrates. The process affords independent control of cavity depth, lateral dimensions and spatial distribution. The manufacture of air-coupled devices is guided by PZFlex modeling based on the range cavity dimension available from the method. Single element devices, operating at 500kHz, exhibit transducer bandwidths in excess of 100% and two-way insertion loss of 62dB being typical. Laser vibrometery confirms uniform surface dilation of the excited. PZFlex, configured with MPI parallelization scheme, has been used to assess linear array performance inter-element cross talk is minimal and observed to be 21dB.

Conference

ConferenceIEEE 2014 International Ultrasonics Symposium
CountryUnited Kingdom
CityChicago
Period3/09/146/09/14

Fingerprint

Transducers
transducers
cavities
linear arrays
Insertion losses
Gases
gases
insertion loss
Spatial distribution
spatial distribution
bandwidth
Bandwidth
Lasers
air
polymers
Polymers
Substrates
Air
lasers

Keywords

  • capacitive transducers
  • modelling
  • finite element
  • air-coupled ultrasound

Cite this

O'Leary, R., & Harvey, G. (Accepted/In press). Polymeric capacitive transducers and arrays for gas coupled operation. Paper presented at IEEE 2014 International Ultrasonics Symposium, Chicago, United Kingdom.
O'Leary, Richard ; Harvey, Gerald. / Polymeric capacitive transducers and arrays for gas coupled operation. Paper presented at IEEE 2014 International Ultrasonics Symposium, Chicago, United Kingdom.
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O'Leary, R & Harvey, G 2014, 'Polymeric capacitive transducers and arrays for gas coupled operation' Paper presented at IEEE 2014 International Ultrasonics Symposium, Chicago, United Kingdom, 3/09/14 - 6/09/14, .

Polymeric capacitive transducers and arrays for gas coupled operation. / O'Leary, Richard; Harvey, Gerald.

2014. Paper presented at IEEE 2014 International Ultrasonics Symposium, Chicago, United Kingdom.

Research output: Contribution to conferencePaper

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AU - O'Leary, Richard

AU - Harvey, Gerald

N1 - (c) 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.

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AB - This paper describes a facile approach for the manufacture of capacitive transducers based on micropatterning of polymer substrates. The process affords independent control of cavity depth, lateral dimensions and spatial distribution. The manufacture of air-coupled devices is guided by PZFlex modeling based on the range cavity dimension available from the method. Single element devices, operating at 500kHz, exhibit transducer bandwidths in excess of 100% and two-way insertion loss of 62dB being typical. Laser vibrometery confirms uniform surface dilation of the excited. PZFlex, configured with MPI parallelization scheme, has been used to assess linear array performance inter-element cross talk is minimal and observed to be 21dB.

KW - capacitive transducers

KW - modelling

KW - finite element

KW - air-coupled ultrasound

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O'Leary R, Harvey G. Polymeric capacitive transducers and arrays for gas coupled operation. 2014. Paper presented at IEEE 2014 International Ultrasonics Symposium, Chicago, United Kingdom.