Patent ID: 8357958

Claim:
An integrated gas sensor device comprising: a semiconductor integrated circuit formed on a single substrate, the semiconductor integrated circuit comprising: MOS circuits formed in the substrate; a plurality of interconnect levels comprised of interconnect conductors and insulating materials above the MOS circuits, the interconnect levels provided as routing interconnect levels for the semiconductor integrated circuit; a resistive sensor layer and a capacitive sensor layer, both the resistive sensor layer and the capacitive sensor layer being formed above the plurality of interconnect levels and being exposed to an ambient atmosphere within which a gas to be sensed may be present; a microcontroller coupled to the resistive sensor layer and capacitive sensor layer, the microcontroller utilizing together resistance measurements from the resistive sensor layer and capacitance measurements from the capacitive sensor layer to provide a measurement indicative of gas concentration levels; and a humidity sensor, the microcontroller utilizing humidity readings from the humidity sensor to adjust the measurement indicative of gas concentration levels.