Patent ID: 8629552
Filing Date: 2014-01-14
Classification: B81B,B81C,H01L,H04R,Y10T

Abstract:
1. A solder reflow surface mount microelectromechanical system (MEMS) microphone device, the 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, the substrate further comprising: a MEMS microphone die mounted on 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; a lid having an upper surface and a planar lower surface, the lower surface of the lid having an interior region and a peripheral region that completely surrounds the interior region of the lid, the lid further comprising an acoustic port formed in the interior region of the lid and passing through the lid; a sidewall spacer having a top surface, a bottom surface, and a window having walls that extend between the top surface and the bottom surface of the sidewall spacer, wherein the sidewall spacer has a predefined thickness, wherein the substrate, the sidewall spacer and the lid are attached to each other, wherein the bottom surface of the sidewall spacer is aligned to the peripheral region of the upper surface of the substrate, and the peripheral region of the lower surface of the lid is aligned to the top surface of the sidewall spacer; wherein the interior region of the upper surface of the substrate, the walls of the window of the sidewall spacer, and the interior region of the lower surface of the lid, when attached, define an acoustic chamber that surrounds the MEMS microphone die; and wherein the lid, the sidewall spacer, and the substrate of the MEMS microphone device form a housing that has surfaces substantially perpendicular to the lower surface of the substrate.