Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1994-12-19
1995-12-26
Jordan, Charles T.
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
367174, 367140, 310324, 29 2535, H04R 1700
Patent
active
054793777
ABSTRACT:
A transducer device and method include affixing a preamplifier or other suitable circuit to a thin piezoelectric membrane. The membrane fully supports the circuit at an inactive region of the membrane. The membrane has at least one piezoelectrically active region that is connected to the circuit by a signal line. Preferably, the signal line is fabricated onto the membrane using integrated circuit fabrication techniques. In the preferred embodiment, the piezoelectrically active region has a diameter of less than one hundred microns and the membrane has a thickness of less than ten microns. A potting compound provides structural support of the membrane and insulates the on-membrane circuit.
REFERENCES:
patent: Re33618 (1995-06-01), Harnden, Jr. et al.
patent: 4354132 (1982-10-01), Borburgh et al.
patent: 4433400 (1984-02-01), DeReggi et al.
patent: 4517665 (1985-05-01), Dereggi et al.
patent: 4545553 (1985-10-01), Finke et al.
patent: 4571579 (1986-02-01), Woolley
patent: 4597099 (1986-06-01), Sawafuji
patent: 4638468 (1987-01-01), Francis
patent: 4653036 (1987-03-01), Harris et al.
patent: 4654554 (1987-03-01), Kishi
patent: 4734611 (1988-03-01), Granz
patent: 4782469 (1988-11-01), Granz et al.
patent: 5035247 (1991-07-01), Heimann
patent: 5055838 (1991-10-01), Wise et al.
patent: 5339290 (1994-08-01), Greenstein
patent: 5381386 (1995-01-01), Lum et al.
Author Unknown, "Phonocardiograph Microphone is Rugged and Moisture Proof", Notes from Manned Spacecraft Center, Houston, Tex.
Bacon, David R., "Characteristics of a pvdf Membrane Hydrophone for Use in the Range 1-100 MHz," IEEE Transactions on Sonics and Ultrasonics, vol. SU-29, No. 1, Jan. 1982, pp. 18-25.
DeReggi, A. S. et al., "Piezoelectric polymer probe for ultrasonic applications," J. Acoust. Soc. Am., vol. 69 No. 3, Mar. 1981, pp. 853-859.
Lewin, Peter A. et al., "Integrated Preamplifiers for Ultrasound Transducers," 1985 Ultrasonics Symposium, 0090-9607/85/0000-0503, 1985, pp. 503-506.
Preston, R. C. et al., "PVDF membrane hydrophone performance properties and their relevance to the measurement of the acoustic output of medical ultrasonic equipment," J. Phys. E: Sci. Instrum., vol. 16, 1983, pp. 786-796.
Greenstein Michael
Kendle Belinda
Lum Paul
Jordan Charles T.
Montgomery Christopher K.
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