Acoustic transducer

Details Acoustic transducer Acoustic transducer

1995-10-02

1997-06-24

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367173, 310344, 310337, H04R 1700, H01L 4108

Patent

active

056423322

ABSTRACT:
An acoustic transducer assembly includes a piezoelectric ceramic crystal. The assembly also includes a pair of solid circular metal plates positioned to sandwich the piezoelectric ceramic crystal between them, wherein each of the metal plates comprises: (i) an outer rim circling a concave portion formed in a first surface of the metal plate, the first surface oriented toward the piezoelectric ceramic crystal; and (ii) an epoxy wicking barrier formed in the first surface, adjacent to the outer rim. The assembly also includes an epoxy adhesive interposed between the metal plates and the piezoelectric ceramic crystal, wherein the outer rim of each plate is bonded to the piezoelectric ceramic crystal by the epoxy adhesive, the pair of plates thus forming a cavity between them. The assembly also includes a flexing stop attached to each first surface.

REFERENCES:
patent: 3187300 (1965-06-01), Brate
patent: 3832762 (1974-09-01), Johnston et al.
patent: 3970878 (1976-07-01), Berglund
patent: 4004266 (1977-01-01), Cook et al.
patent: 4431937 (1984-02-01), White
patent: 4999819 (1991-03-01), Newnham et al.
patent: 5276657 (1994-01-01), Newnham et al.

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