Condenser microphone and production method thereof

摘要

A condenser microphone has a conductive diaphragm 3 having an earth electrode layer 31 formed of a conductive light metal; a conductor fixed electrode 5 arranged opposite to the conductive diaphragm 3 through an air layer; an organic dielectric layer 32 formed of the organic compound provided on the boundary surface 32C side between the air layer and the conductive diaphragm 3; and a permanent electric charge layer 32A composed of ions or electrons formed in the inner portion side receding from the air layer 8 side, from a middle position in the thickness direction of the organic dielectric layer 32 in the inside of the organic dielectric layer 32.