Patent ID: 9695040
Date: 2017-07-04
CPC Classifications: B81B,B81C,H01L,H04R

Claim:
1. A microphone system comprising: a package including a base and a lid collectively forming an interior chamber; a MEMS microphone die secured within the interior chamber, the lid forming an aperture to allow acoustic access to the interior chamber and the MEMS microphone die, wherein the package comprises a substrate supporting the MEMS microphone die, and the lid is configured to mitigate electromagnetic interference; a primary circuit die located within the interior chamber and electrically connected to the MEMS microphone die and comprising at least one active circuit element; a secondary lid configured to secure the lid, sandwiching the base, wherein the lid and the secondary lid form the interior chamber, further wherein the MEMS microphone die is configured to receive acoustic signals through the aperture and from a channel that directs the acoustic signals to the MEMS microphone die, wherein the channel begins at a side aperture located between a side of the lid and a side of the second lid, the side aperture leading to the base aperture through the base; and an integrated device die, with only passive circuit elements, electrically connected to the primary circuit die, wherein the integrated device die is configured to perform at least one of radio frequency (RF) filtering and power supply decoupling.