Patent ID: 9617144
Date: 2017-04-11
CPC Classifications: B81B,B81C,H01L,H04R

Claim:
1. A device comprising: a package; a MEMS acoustic sensing element comprising a diaphragm disposed in the package; an integrated circuit (IC) disposed in the package and comprising an IC substrate having an environmental sensing material of an environmental sensor disposed in the IC substrate, wherein the environmental sensor comprises the environmental sensing material in a configuration sensitive to a change in an environmental characteristic independent of pressure experienced by the environmental sensor, wherein the environmental sensor is comprised of a plurality of segments of the environmental sensing material interspersed between and in direct contact with a plurality of metal electrodes, wherein the plurality of metal electrodes are subjected to a variable electrical environment in response to the change in the environmental characteristic, and wherein at least one of the plurality of metal electrodes comprises a heating element of the environmental sensor, and wherein the IC is 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 comprising the environmental sensor.