Patent ID: 8969980
Filing Date: 2015-03-03
Classification: B81B,H01L,H04R

Abstract:
1. A micro-electromechanical system (MEMS) device, comprising: a housing; a base with a port opening extending therethrough, wherein the port opening communicates with the external environment; a MEMS die disposed on the base and over the opening, the MEMS die securing a diaphragm and a back plate, wherein the MEMS die, the base, and the housing form a back volume; wherein a longitudinal axis extends longitudinally through a center of the MEMS die, the diaphragm, the back plate, and the port opening; at least one vent extending through the MEMS die and not through the diaphragm or the back plate, the at least one vent being a passageway with a first end and a second end, the passageway being surrounded on at least three sides by the MEMS die and opening at the first end and the second end, the at least one vent extending in a generally outward and radial direction from the longitudinal axis, the at least one vent communicating with the back volume and the port opening, the at least one vent being configured to allow venting between the back volume and the external environment, the venting being effective to equalize pressure between the back volume and the outside environment wherein the first end opens to the back volume and the second end opens to the outside environment.