Method of making stationary electrodes for electrostatic transdu

Details Method of making stationary electrodes for electrostatic transdu Method of making stationary electrodes for electrostatic transdu

1981-01-02

1983-05-10

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

29825, 179111R, H04R 3100

Patent

active

043823289

ABSTRACT:
In the method disclosed herein, a nonconductive plastic frame is utilized which provides a planar face portion, there being a plurality of recesses distributed over the face. Selective areas of the face are coated with a conductive layer, avoiding the recesses. An adhesive is then coated over essentially the entire face portion, including at least the margins of the recesses. A film of a high dielectric strength polymer is placed over the face portion and this film is locally distorted into each of the recesses so as to, in effect, wrap the film around the margin of each of the recesses and to then puncture the film centrally in each recess. Electrodes constructed in this fashion are utilized in electrostatic transducers by assembling a pair of such electrodes in face-to-face relationship, together with an intervening diaphragmatic movable electrode.

REFERENCES:
patent: 3892927 (1975-07-01), Lindenberg
patent: 3894333 (1975-07-01), Chang
patent: 3993939 (1976-11-01), Slavin et al.

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