Miniature MEMS condenser microphone packages and fabrication method thereof
First Claim
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.
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Accused Products
Abstract
MEMS microphone packages and fabrication methods thereof are disclosed. One method for fabricating a MEMS microphone package, includes 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, and 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.
19 Citations
12 Claims
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1. A method for fabricating a MEMS microphone package, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification