Integrated package containing MEMS acoustic sensor and environmental sensor and methodology for fabricating same
First Claim
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1. A microelectromechanical systems (MEMS) device package comprising:
- a package comprising a package substrate and a lid;
an environmental sensor comprising a gas sensor with a heating element configured to sense a composition parameter of a gas, wherein the composition parameter of the gas is associated with at least one of a chemical parameter, a biological parameter, a nanoparticle parameter, a spore parameter, or a pathogen parameter of the gas, and wherein the environmental sensor is disposed on the package substrate;
a MEMS acoustic sensing element comprising a diaphragm and disposed in the package;
an integrated circuit (IC) disposed in the package and configured to process data generated by the MEMS acoustic sensing element and the environmental sensor; and
a port disposed in the package configured to receive acoustic waves for the MEMS acoustic sensing element and air for the environmental sensor, wherein the package includes an acoustically sealed back cavity that encompasses the MEMS acoustic sensing element and the IC.
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Abstract
An integrated package of at least one environmental sensor and at least one MEMS acoustic sensor is disclosed. The package contains a shared port that exposes both sensors to the environment, wherein the environmental sensor measures characteristics of the environment and the acoustic sensor measures sound waves. The port exposes the environmental sensor to an air flow and the acoustic sensor to sound waves. An example of the acoustic sensor is a microphone and an example of the environmental sensor is a humidity sensor.
33 Citations
17 Claims
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1. A microelectromechanical systems (MEMS) device package comprising:
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a package comprising a package substrate and a lid; an environmental sensor comprising a gas sensor with a heating element configured to sense a composition parameter of a gas, wherein the composition parameter of the gas is associated with at least one of a chemical parameter, a biological parameter, a nanoparticle parameter, a spore parameter, or a pathogen parameter of the gas, and wherein the environmental sensor is disposed on the package substrate; a MEMS acoustic sensing element comprising a diaphragm and disposed in the package; an integrated circuit (IC) disposed in the package and configured to process data generated by the MEMS acoustic sensing element and the environmental sensor; and a port disposed in the package configured to receive acoustic waves for the MEMS acoustic sensing element and air for the environmental sensor, wherein the package includes an acoustically sealed back cavity that encompasses the MEMS acoustic sensing element and the IC. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for fabricating a microelectromechanical systems (MEMS) device package comprising:
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forming a package substrate; forming a MEMS acoustic sensor element comprising a diaphragm in the MEMS device package; forming, in the MEMS device package, a gas sensor comprising a heating element and an environmental sensing material in a configuration sensitive to a change in an environmental characteristic associated with a gas composition parameter of a gas at the environmental sensing material, wherein the composition parameter of the gas is associated with at least one of a chemical parameter, a biological parameter, a nanoparticle parameter, a spore parameter, or a pathogen parameter of the gas, and wherein the forming the gas sensor includes depositing a plurality of segments of the environmental sensing material interspersed between a plurality of metal electrodes in direct contact with the environmental sensing material; forming electrical connections between an application specific integrated circuit (ASIC) disposed in the MEMS device package and the MEMS acoustic sensor element and between the ASIC and the gas sensor; forming a cover attached to the package substrate to encompass the MEMS acoustic sensor element, the ASIC, and the gas sensor; and forming an opening in the MEMS device package, wherein the opening is configured to receive sound waves and the gas. - View Dependent Claims (10, 11, 12, 13)
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14. A microelectromechanical systems (MEMS) device package, comprising:
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a package comprising a package substrate and a lid; a gas sensor comprising a heating element, wherein the gas sensor is disposed on the package substrate and configured to sense a composition parameter of a gas comprising at least one of a chemical parameter, a biological parameter, a nanoparticle parameter, a spore parameter, or a pathogen parameter of the gas; a MEMS acoustic sensing element comprising a diaphragm and disposed in the package; and an integrated circuit (IC) disposed in the package and configured to process data generated by the MEMS acoustic sensing element and the gas sensor; a port disposed in the package configured to receive acoustic waves for the MEMS acoustic sensing element and air for the gas sensor, wherein the package includes an acoustically sealed back cavity that encompasses the MEMS acoustic sensing element and the IC. - View Dependent Claims (15, 16, 17)
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Specification