Method of manufacturing an electret device

Details Method of manufacturing an electret device Method of manufacturing an electret device

H - Electricity

04

R

356/200

H04R 19/01 (2006.01) H01G 7/02 (2006.01)

Patent

CA 1122722

- 19 - Abstract of the Disclosure A method of manufacturing an electret device which comprises the step of causing a pressure deformation jig whose surface is provided with numerous minute convex and concave regions to abut against the surface of a raw dielectric material for an electret and later be removed therefrom, thereby forming minute stretched and contracted region on the surface of said dielectric material.

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