Multi-layer ceramic acoustic transducer

Details Multi-layer ceramic acoustic transducer Multi-layer ceramic acoustic transducer

2006-12-12

2006-12-12

Dougherty, Thomas M. (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S366000

Reexamination Certificate

active

07148608

ABSTRACT:
A method for manufacturing a multi-layer acoustic transducer with reduced total electrical impedance. The method is based on the bonding of two piezoelectric ceramic layers with confronting metallized surfaces to a thin electrical conductor, then electrically connecting the top and bottom surfaces to form a wrap-around electrode while a center conductor forms a second electrode. The total electrical impedance of a two-layer ceramic stack comprised of piezoelectric layers connected in this manner is one-fourth that of a solid ceramic element of the same size. This provides for better matching of the acoustic stack impedance to that of the electrical cable, increased penetration depth for imaging within the body, and improved acoustic element sensitivity.

REFERENCES:
patent: 4217684 (1980-08-01), Brisken et al.
patent: 4460841 (1984-07-01), Smith et al.
patent: 5329496 (1994-07-01), Smith
patent: 5381385 (1995-01-01), Greenstein
patent: 6817073 (2004-11-01), Uchiyama et al.
patent: 7006334 (2006-02-01), Uchiyama
patent: 7017245 (2006-03-01), Baumgartner et al.
patent: 2005/0134142 (2005-06-01), Yetter et al.
Goldbert et al., “Multi-Layer PZT Transducer Arrays for Improved Sesitivity”, 1992 IEEE Ultrasonics Symposium, pp. 551-554.
Saitoh et al., “A Low-Impedance Ultrasonic Probe Using a Multilayer Piezoelectric Ceramic”, Jap. Jour. Appl. Phys., vol. 28, Supp. 28-1, pp. 54-56 (1989).
Desilets et al., “Effect of Wraparound Electrodes on ultrasonic Array Performance”, 1998 IEEE Ultrasonics Symposium (preprint).
Martin et al., “Back-Face Only Electrical Connections of Thickness Mode Piezoelectric Transducers”, IEEE Trans. UFFC, vol. 33, No. 6, 778-781 (1986).

Affiliated with

Also associated with

Rating

Multi-layer ceramic acoustic transducer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multi-layer ceramic acoustic transducer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-layer ceramic acoustic transducer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3711179