Patent ID: 8697470
Filing Date: 2014-04-15
Classification: B81B,H01L,H04R,H05K,Y10T

Abstract:
1. A method for fabricating a MEMS microphone package, comprising: providing a substrate; forming a cavity enclosed by a top cover part, wherein a housing wall part surrounds and supports the top cover part, and the substrate supports the housing wall part and the cover part; forming a MEMS sensing element and an IC chip inside the cavity; forming an opening comprising an acoustic passage connecting the cavity to an ambient space; forming a conductive casing enclosing the top cover part and the housing wall, wherein the conductive casing is soldered to a PCB board and is electrically connected to a common analog ground lead on the PCB board; and forming an acoustic absorption layer sandwiched between the conductive casing and the cavity.