Electroacoustic transducer

Details Electroacoustic transducer Electroacoustic transducer

H - Electricity

04

R

349/69

H04R 19/01 (2006.01) H04R 17/00 (2006.01)

Patent

CA 1199396

- 18 - ELECTROACOUSTIC TRANSDUCER Abstract A transducer embodying the present invention is assembled on a discrete electrically conductive frame that has been formed to provide both leads and a backplate. An integrated circuit chip is bonded to one of the leads, and a dielectric inner housing member is molded about the backplate and the portion of the leads adjacent to it. The inner housing member encapsulates the chip, embraces the perimeter of the backplate, and provides a cylindrical opening that extends on each side of the backplate. conductive outer housing member is subsequently molded about the perimeter of the inner housing member, and a spacer, electret diaphragm assembly, and conductive gasket are sequentially positioned in the opening on one side of the backplate. Conductive front and back covers are thereafter bonded to the outer housing to close the opening and to complete a conductive enclosure that provides electrostatic shielding for the transducer. In addition, electrical continuity is provided between a metalized surface on the electret diaphragm and the conductive enclosure by means of the gasket.

432592

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