Electroacoustic diaphragm and method for making same

Details Electroacoustic diaphragm and method for making same Electroacoustic diaphragm and method for making same

1989-04-07

1991-11-12

Brown, Brian W.

Acoustics

Diaphragm

Critically defined material or coating

G10K 1300, H04R 700

Patent

active

050640194

ABSTRACT:
An electroacoustic diaphragm is provided, which diaphragm comprising a pyrolytic graphite film obtained from a polymer selected from polyoxadiazole, an aromatic polyimide obtained by polycondensation or pyromellitic acid and an aromatic diamine, polybenzthiazole, polybenzbisthiazole, polybenzoxazole, polybenzbisoxazole, poly(pyromellitimide), poly(m-phenyleneisophthalamide). poly(m-phenylenebenzoimidazole), poly(m-phenylenebenzobisimidazole), polythiazole and poly-p-phenylenevinylene. The graphite film has a discontinuous layer of a polymeric material formed on and in the film whereby not only good electroacoustic characteristics, but also good mechanical strength and good adhesion of an adhesive applied thereof are obtained. A method for fabricating such diaphragm is also described.

REFERENCES:
patent: 4221773 (1980-09-01), Tsukagoshi et al.

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