Patent ID: 8704360

Claim:
A solder reflow surface mount microelectromechanical system (MEMS) microphone device comprising: a substrate having a planar upper surface and a planar lower surface, the upper surface having an interior region and a peripheral region that completely surrounds the interior region, each substrate further comprising: a first plurality of metal pads formed on the upper surface of the substrate; a second plurality of metal pads formed on the lower surface of the substrate and arranged within a perimeter of the lower surface of the substrate, wherein the second plurality of metal pads are configured to mechanically attach and electrically couple the surface mount MEMS microphone device to pads on a surface of an external printed circuit board; and one or more electrical pathways formed completely within the substrate, wherein the pathways electrically couple one or more of the first plurality of metal pads on the upper surface of the substrate to one or more of the second plurality of metal pads on the lower surface of the substrate; a MEMS microphone die mounted to the upper surface of the substrate and electrically coupled to at least one of the first plurality of metal pads on the upper surface of the substrate; and a single-piece cover that has a top region with an acoustic port that passes completely through the cover, and a sidewall region, the sidewall region adjoining the top region at a substantially perpendicular angle and having a predetermined height, an exterior surface, an interior surface, and a bottom surface, wherein the bottom surface of the sidewall region is aligned with and attached to the peripheral region of the upper surface of the substrate, thereby forming a protective enclosure for the MEMS microphone die that reduces electromagnetic interference, and wherein the predetermined height and interior surface of the sidewall region and interior surface of the top region, in cooperation with the interior region of the upper surface of the substrate, defines an acoustic chamber for the MEMS microphone die.