Patent ID: 8842858

Claim:
An electret condenser microphone comprising: a carrier comprising first and second electrical traces, and an upper surface holding a microphone preamplifier with an audio input electrically connected to the first electrical trace; an exterior sidewall structure attached to the carrier to surround the microphone preamplifier and comprising a non-conductive base material carrying a first electrical wiring pattern and a second electrical wiring pattern, the first and second electrical wiring patterns being electrically connected to the first and second electrical traces, respectively, of the carrier; a diaphragm holder, carrying a conductive microphone diaphragm, attached to the sidewall structure to establish electrical connection between the conductive microphone diaphragm and one of the first and second electrical wiring patterns; and a conductive perforated backplate comprising a permanently charged electret layer, wherein the conductive perforated backplate comprises a peripheral portion supported by the sidewall structure to electrically connect the conductive perforated backplate to another one of the first and second wiring patterns of the sidewall structure and place the conductive perforated backplate in spaced relationship to the conductive microphone diaphragm.