Surgery – Truss – Pad
Patent
1994-09-09
1996-02-06
Jaworski, Francis
Surgery
Truss
Pad
310334, 12866206, A61B 800, H01L 4108
Patent
active
054889545
ABSTRACT:
An improved ultrasonic transducer fabricated on a silicon base has a piezoelectric layer of polyvinylidene fluoride-trfluroethylene copolymer. The piezoelectric layer is sandwiched between two conductive electrodes, all of which are supported on a dielectric layer on top of the silicon base. At least one of the electrodes forms a Fresnel zone plate to focus the ultrasonic signals from the transducers. To improve the performance of the transducer, the silicon base behind the active area is removed, leaving the dielectric layer as a membrane to support the electrodes and the piezoelectric layer. The resulting void in the silicon base is filled with an acoustically matched backing, such as an epoxy, to enhance the wideband performance of the transducer. The transducer is especially suited for characterizing anatomical structures or features requiring very high resolution.
REFERENCES:
patent: 5041849 (1991-08-01), Quate et al.
patent: 5070882 (1991-12-01), Bui et al.
patent: 5075652 (1991-12-01), Sugai
patent: 5115814 (1992-05-01), Griffith et al.
patent: 5160870 (1992-11-01), Carson et al.
patent: 5207103 (1993-05-01), Wise et al.
patent: 5207672 (1993-05-01), Roth et al.
patent: 5278028 (1994-01-01), Hadimioglu et al.
patent: 5287331 (1994-02-01), Schindel et al.
patent: 5291090 (1994-03-01), Dias
patent: 5368037 (1994-11-01), Eberle et al.
patent: 5381386 (1995-01-01), Lum et al.
patent: 5406163 (1995-04-01), Carson et al.
Integrated Silicon-PVF.sub.2 Acoustic Transducer Arrays; IEEE Transactions on Electron Devices, vol. ED-26, No. 12, Dec. 1979, pp. 1921-1931; Authors: Schwartz, et al.
AP (VDF-TrFE)-based Integrated Ultrasonic Transducer; Sensors and Actuators, A21-A23 (1990) 719-725 Authors: Fiorillo, et al.
Micromachining for Improvement of Integrated Ultrasonic Transducer Sensitivity; IEEE Transactions on Electron Devices, vol. 37, No. 1, Jan. 1990, pp. 134-140 Authors: Jian-Hua Mo, et al.
Planar-Structure Focusing Lens for Operation at 200 Mhz and Its Application to the Reflection-Mode Acoustic Microscope; 1986 IEEE (1986 Ultrasonics Symposium, 745-748); Authors: Yamada, et al.
Acoustic Frasnel zone plate transducers; Applied Physics Letters, vol. 25, No. 12, Dec. 15, 1974, pp. 681-682 Authors: Farnow, et al.
Design and Construction of a PVDF Fresnel Lens; 1990 Ultrasonics Symposium, pp. 821-826 (IEEE 1990) Authors: Sleva, M. Z. and W. D. Hunt.
Ultrasound Backscatter Microscopy; Sherar, et al.; 1988 Ultrasonics Symposium, pp. 959-965 (1990 IEEE).
Integrated Piezoeletric Polymers for Microsensing and Microactuation Applications; Rashidian, et al.; DSC-vol. 32, Micromechanical Sensors, Actuators, and Systems; ASME 1991; pp. 171-179.
A High Frequency Intravascular Ultrasound Imaging System for Investigation of Vessell Wall Properties; Ryan, et al.; 1992 Ultrasonics Symposium (1992 IEEE); pp. 1101-1105.
Briggs Ronald D.
Connuck David M.
Hunt William D.
Sleva Michael Z.
Georgia Tech Research Corp.
Jaworski Francis
Medical College of Georgia Research Institute
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