Results 151 to 160 of about 1,251 (192)

Biasing of Capacitive Micromachined Ultrasonic Transducers

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2017
Capacitive micromachined ultrasonic transducers (CMUTs) represent an effective alternative to piezoelectric transducers for medical ultrasound imaging applications. They are microelectromechanical devices fabricated using silicon micromachining techniques, developed in the last two decades in many laboratories.
Caliano, Giosuè, MATRONE, GIULIA, Savoia, Alessandro Stuart   +2 more
openaire   +3 more sources

Capacitive micromachined ultrasonic transducer (CMUT) array with single‐layer graphene membrane

Micro and Nano Letters, 2014
A capacitive micromachined ultrasonic transducer (CMUT) with a graphene membrane is reported. The CMUT membranes were commonly made from very thin silicon nitride or metal material. To date, no graphene CMUT has been successfully used.
Ching-Hsiang Cheng
exaly   +2 more sources

An accurate model for capacitive micromachined ultrasonic transducers

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2002
Modeling of capacitive micromachined ultrasonic transducers (cMUTs) is based on a two-port network with an electrical and a mechanical side. To obtain a distributed model, a solution of the differential equation of motion of the diaphragm for each element of the transducer has to be found.
CARONTI A, CALIANO G, PAPPALARDO M., IULA, Antonio   +3 more
openaire   +5 more sources

Micromachined ultrasonic capacitance transducers for immersion applications

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 1998
Investigations into the characteristics of water-coupled ultrasonic capacitance transducers have been undertaken for a range of transducer configurations. The radiated fields have been scanned in water using a miniature hydrophone detector, and the results compared to theory based on a plane piston approach. Micromachined backplates in conjunction with
A G, Bashford, D W, Schindel, D A, Hutchins   +2 more
openaire   +2 more sources

The characterization of capacitive micromachined ultrasonic transducers in air

Ultrasonics, 2002
Surface micromachined, capacitive ultrasonic transducers have been fabricated using a low thermal budget, CMOS-compatible process. They exhibit interesting properties for transduction in air at frequencies in excess of 1 MHz, when driven from a standard ultrasonic voltage source.
J S, McIntosh, D A, Hutchins, D R, Billson, T J, Robertson, R A, Noble, A D R, Jones   +5 more
openaire   +2 more sources

Dynamic analysis of capacitive micromachined ultrasonic transducers

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2005
Electrostatic transducers are usually operated under a DC bias below their collapse voltage. The same scheme has been adopted for capacitive micromachined ultrasonic transducers (cMUTs). DC bias deflects the cMUT membranes toward the substrate, so that their centers are free to move during both receive and transmit operations. In this paper, we present
Baris, Bayram, Goksen G, Yaralioglu, Mario, Kupnik, A Sanli, Ergun, Omer, Oralkan, Amin, Nikoozadeh, Butrus T, Khuri-Yakub   +6 more
openaire   +2 more sources

Capacitive micromachined ultrasonic transducers: fabrication technology

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2005
Capacitive micromachined ultrasonic transducer (cMUT) technology is a prime candidate for next generation imaging systems. Medical and underwater imaging and the nondestructive evaluation (NDE) societies have expressed growing interest in cMUTs over the years. Capacitive micromachined ultrasonic transducer technology is expected to make a strong impact
Arif Sanli, Ergun, Yongli, Huang, Xuefeng, Zhuang, Omer, Oralkan, Goksen G, Yaralioglu, Butrus T, Khuri-Yakub   +5 more
openaire   +2 more sources

Pragmatics of capacitive micromachined ultrasonic transducer

2017 International Conference on Emerging Trends in Computing and Communication Technologies (ICETCCT), 2017
With the development in silicon micromachining technology over two decades the Capacitive Micromachined Ultrasonic Transducers (CMUTs) have been found to be a good substitute for piezoelectric transducers. CMUTs have the advantage of being fully compatible when integrated with the on chip electronics resulting in the production of acutely low cost and ...
Rashmi Sharma, Rekha Agarwal, Ashwani Kumar Dubey, Anil Arora   +3 more
openaire   +1 more source

Rotational capacitive micromachined ultrasonic transducers

2014 IEEE International Ultrasonics Symposium, 2014
A rotational capacitive micromachined ultrasonic transducer (RCMUT) for airborne ultrasound applications is presented. The device is comprised of two conventional parallel-plate CMUTs mechanically coupled via a pivoting-beam structure. The cavity beneath each CMUT piston is vacuum-sealed to reduce thermal-mechanical noise and unwanted air-film dynamics.
Donghwan Kim, Michael L. Kuntzman, Neal A. Hall   +2 more
openaire   +1 more source

Applications of Capacitive Micromachined Ultrasonic Transducers: A Comprehensive Review

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2022
Capacitive micromachined ultrasonic transducer (CMUT) was introduced as an alternative to the piezoelectric thick-film-based transducers in medical imaging applications. Gradually, CMUTs have been investigated in almost all the applications in acoustics due to their superior transduction properties.
Jose Joseph, Bo Ma, B. T. Khuri-Yakub
openaire   +2 more sources