Method of making a transducing composite of sintered piezoelectr

Details Method of making a transducing composite of sintered piezoelectr Method of making a transducing composite of sintered piezoelectr

1999-04-30

2000-07-04

Hall, Carl E.

Metal working

Piezoelectric device making

310337, H01L 4122

Patent

active

060819790

ABSTRACT:
A piezoelectric ceramic-polymer composite is made of a substantially two-dimensional polymer matrix and a monolayer of sintered piezoelectric ceramic granules dispersed throughout the matrix so that each granule has an upper portion protruding from one side of the matrix and a lower portion protruding from the opposite side of the matrix. The composite is formed by partially embedding a monolayer of sintered piezoelectric ceramic granules in a pliable material, then partially covering the granules with a polymer resin, curing the resin to form a matrix and removing the pliable material. A transducer is formed by flattening the upper and lower portions of the granules to form coplanar top and bottom surfaces parallel to, but not coplanar with the surface of the matrix, then electroding the granule surfaces, attaching top and bottom cover plates, and sealing the transducer around the edges.

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Harrison, W. B., "Flexible Piezoelectric Organic Composites" Proceedings of the Workshop on Sonar Transducer Materials, Naval Research Laboratories, Nov. 1975, p. 257.

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