Patent ID: 9215519
Filing Date: 2015-12-15
Classification: H01L,H04R

Abstract:
1. A microphone system comprising: a base; a chip system coupled to the base, the chip system comprising a microphone chip and a circuit chip in a stacked relationship, the circuit chip having a body, the circuit chip and microphone chip being configured to electrically communicate, the microphone chip having a diaphragm configured to move, relative to the backplate, upon receipt of an incident audio signal, the backplate having a plurality of backplate holes, the circuit chip having at least one through hole directly through the circuit chip body forming at least a part of the audio channel to permit audio signals to contact the diaphragm therefore audibly coupled with the diaphragm of the microphone; a filtering material covering the through hole; and a nonconductive epoxy film formed about the periphery of the at least one through hole of the circuit chip, securing the microphone chip to the circuit chip and having a plurality of holes that effectively form another filter for and inside the audio channel,