MEMS microphone with a stacked PCB package and method of producing the same
First Claim
1. A MEMS package comprising:
- at least one MEMS acoustic sensor device;
a PCB stack on which said at least one MEMS acoustic sensor device and one or more electronic components are mounted;
a metal cap structure surrounding said at least one MEMS acoustic sensor device and said one or more electronic components wherein an edge surface of said metal cap structure is attached and electrically connected to said PCB stack wherein an opening in said metal cap structure is not aligned with said at least one MEMS acoustic sensor device and wherein said opening allows external fluid, acoustic energy or pressure to enter said at least one MEMS acoustic sensor device; and
a back chamber formed underlying said at least one MEMS acoustic sensor device and within said PCB stack wherein an opening underlying said at least one MEMS acoustic sensor device accesses said back chamber.
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Accused Products
Abstract
A MEMS microphone with a stacked PCB package is described. The MEMS package has at least one MEMS acoustic sensor device located on a PCB stack. A metal cap structure surrounds the at least one MEMS acoustic sensor device wherein an edge surface of the metal cap structure is attached and electrically connected to the PCB stack. In a first embodiment, a back chamber is formed underlying the at least one MEMS acoustic sensor device and within the PCB stack wherein an opening underlying the at least one MEMS acoustic sensor device accesses the back chamber. An opening in the metal cap structure not aligned with the at least one MEMS acoustic sensor device allows external fluid, acoustic energy or pressure to enter the at least one MEMS acoustic sensor device. In a second embodiment, a back chamber is formed in the space under the metal cap and over the first PCB. A hollow chamber is formed between the first PCB and the second PCB wherein an opening under the at least one MEMS acoustic sensor device accesses the hollow chamber. An opening in a bottom surface of the PCB stack not aligned with the at least one MEMS acoustic sensor device also accesses the hollow chamber and allows external fluid, acoustic energy or pressure to enter the at least one MEMS acoustic sensor device.
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Citations
25 Claims
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1. A MEMS package comprising:
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at least one MEMS acoustic sensor device; a PCB stack on which said at least one MEMS acoustic sensor device and one or more electronic components are mounted; a metal cap structure surrounding said at least one MEMS acoustic sensor device and said one or more electronic components wherein an edge surface of said metal cap structure is attached and electrically connected to said PCB stack wherein an opening in said metal cap structure is not aligned with said at least one MEMS acoustic sensor device and wherein said opening allows external fluid, acoustic energy or pressure to enter said at least one MEMS acoustic sensor device; and a back chamber formed underlying said at least one MEMS acoustic sensor device and within said PCB stack wherein an opening underlying said at least one MEMS acoustic sensor device accesses said back chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A MEMS package comprising:
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at least one MEMS acoustic sensor device and one or more electronic components; a PCB stack on a top surface of which said at least one MEMS acoustic sensor device and said one or more electronic components are mounted; a metal cap structure surrounding said at least one MEMS acoustic sensor device and said one or more electronic components wherein an edge surface of said metal cap structure is attached and electrically connected to said PCB stack; and a back chamber formed within said metal cap above said at least one MEMS acoustic sensor device and said top surface of said PCB stack wherein an opening underlying said at least one MEMS acoustic sensor device accesses a hollow chamber within said PCB stack and wherein an opening in a bottom surface of said PCB stack is not aligned with said at least one MEMS acoustic sensor device and wherein said opening and said hollow chamber allow external fluid, acoustic energy or pressure to enter said at least one MEMS acoustic sensor device. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method for fabricating a MEMS acoustic sensor device in a stacked PCB package comprising:
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providing a first PCB; mounting said MEMS acoustic sensor device and one or more electronic components on a top surface of said first PCB; mounting a metal cap structure on said top surface of said first PCB and encapsulating said MEMS acoustic sensor device; and mounting a second PCB on a bottom surface of said first PCB wherein a hollow chamber is formed between said first PCB and said second PCB and wherein an opening underlying said MEMS acoustic sensor device accesses said hollow chamber to complete said fabricating said MEMS acoustic sensor device in said stacked PCB package. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification