Measuring and testing – Vibration – By mechanical waves
Patent
1994-07-27
1997-04-29
Williams, Hezron E.
Measuring and testing
Vibration
By mechanical waves
310358, 310334, 310364, 310366, 12866203, 367162, G01N 2900, H01L 4108, A61B 814, H04R 1700
Patent
active
056251491
ABSTRACT:
A multilayer composite transducer is disclosed. The multilayer composite transducer comprises a plurality of layers wherein a piezoelectric material is dispersed periodically within a polymer matrix. The piezoelectric material is typically formed into columns or slabs, and these columns and slabs need to be aligned from one layer to the next. As this alignment can be difficult to perform, the present invention teaches a first method for fabricating the multilayer composite transducer which allows the alignment to be easily accomplished and a second and third method which reduce or eliminate the need for the alignment.
REFERENCES:
patent: 4963782 (1990-10-01), Bui et al.
patent: 5115809 (1992-05-01), Saitoh et al.
patent: 5239736 (1993-08-01), Sliwa, Jr. et al.
patent: 5359760 (1994-11-01), Busse et al.
patent: 5392259 (1995-02-01), Bolorforosh
M.I. Haller, et al. "Tapered Acoustic Matching Layers" Nov. 1993.
M.I. Haller, et al. "Micromachined Acoustic Matching Layers" Jul. 1992.
J.D. Larson III, "An Acoustic Transducer Array For Medical Imaging" Oct. 1983.
M.I. Haller, et al. "Micromachined Ultrasonic Materials" 1991.
Aero-Tech Reports "One-Quarter Wavelength Theory and Application" 1978.
Aero-Tech Reports "Multiple Matching Layer Theory and Application" 1980.
P.C. Pedersen, et al. "Impedance Matching Properties of an Inhomogeneous Matching Layer with Continuously Changing Acoustic Impedance" Apr. 1982.
T.R. Gururaja, "Piezoelectric Transducers for Medical Ultrasonic Imaging" Sep. 1992.
SPIE, "New Developments in Ultrasonic Transducers and Transducer Systems" Jul. 1992.
W.A. Smith, "Composite Piezoelectric Materials for Medical Ultrasonic Imaging Transducers" 1986.
Gururaja Turukevere R.
Ladd Larry A.
Hewlett--Packard Company
Moller Richard A.
Penn Jonathan B.
Williams Hezron E.
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