Electret transducer and a method for manufacturing an assembly o

Electrical transmission or interconnection systems – Electrets

Patent

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Details

179111E, 29592E, G11C 1302

Patent

active

045673829

ABSTRACT:
An electret transducer and a method for making same. A multiple support between a diaphragm plate and a backplate is provided by a plurality of relatively small spacing disks made of an electrically insulating material and which as separate posts are fixedly attached on the upper surface of the backplate. Such spacing disks are conveniently and accurately punched from a foil of dielectric material which is held opposite and above the backplate, whereafter the spacing disks thus formed are attached on the backplate.

REFERENCES:
patent: 3772133 (1973-11-01), Schmitt
patent: 4070741 (1978-01-01), Djuric
patent: 4160881 (1979-07-01), Smulders
patent: 4250415 (1981-02-01), Lewiner et al.
patent: 4356049 (1982-10-01), Tamura et al.

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