Multi-Temperature Gas Sensor Layout for Single-Chip Multi-Gas Detection
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Solution Overview
Problem
Existing gas sensors for complex atmosphere detection require multiple micro-heating chips with separate heating structures, leading to low integration, large volume, and high power consumption, and are unable to detect multiple gases simultaneously with a single chip.
Innovation Solution
A multi-dimensional multi-parameter gas sensor with a micro-heating structure that integrates heating electrodes of different sizes and layouts to form heating regions of varying temperatures, using a silicon-based substrate and heating layers to accommodate multiple gas-sensitive materials on a single chip.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple micro-heating chips are used for complex atmosphere detection, then detection capability is improved, but device volume and power consumption increase
Solution Approach 1:
The patent combines multiple heating electrodes of different sizes and layouts onto a single micro-heating chip, creating multiple heating regions with different temperature zones. This merging approach allows one chip to perform the function of multiple chips, reducing device volume while maintaining complex atmosphere detection capability through simultaneous multi-temperature sensing.
Solution Approach 2:
The patent introduces spatial dimensionality by designing heating electrodes with different sizes, shapes, and layouts on the same chip substrate. This creates a multi-dimensional temperature distribution pattern, allowing different gas-sensitive materials to be heated to their optimal temperatures simultaneously on a single chip, thereby achieving complex gas detection without increasing device volume.
2Adaptability or versatility
If multiple micro-heating chips are used for complex atmosphere detection, then detection capability is improved, but power consumption increases
Solution Approach 1:
The patent merges multiple heating functions into a single micro-heating chip with integrated heating electrodes. Although multiple heating regions operate simultaneously at different temperatures, they share common control and support structures, reducing overall power management overhead and enabling more efficient energy utilization compared to multiple independent chips.
Solution Approach 2:
The single micro-heating chip is designed with universal functionality to support multiple gas-sensitive materials requiring different operating temperatures. By integrating multiple heating zones with different temperature characteristics into one chip, the system achieves multi-functionality without the cumulative power consumption of multiple separate chips.
3Adaptability or versatility
If multiple micro-heating chips are used for complex atmosphere detection, then detection capability is improved, but device integration is reduced
Solution Approach 1:
The patent merges multiple heating electrodes, multiple heating regions, and multiple gas-sensitive material layers onto a single micro-heating chip substrate. This high-level integration consolidates what would traditionally require multiple separate chips into one unified device, improving device integration while maintaining the capability to detect complex atmospheric compositions through multi-temperature sensing.
4Device complexity
If a single chip is used for complex atmosphere detection, then device integration is improved, but temperature control capability deteriorates
Solution Approach 1:
The patent applies local quality by designing heating electrodes with different sizes, shapes, and layouts in different regions of the chip. Each heating region is optimized to provide a specific temperature zone suitable for particular gas-sensitive materials. This local differentiation of heating characteristics enables precise temperature control for multiple materials simultaneously on a single integrated chip.
Solution Approach 2:
The chip is segmented into multiple heating regions, each with its own heating electrode configuration optimized for specific temperature requirements. This segmentation allows independent temperature control of different zones on the same chip, enabling simultaneous operation of gas-sensitive materials with different optimal temperatures while maintaining high device integration.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The sensor achieves complex atmosphere detection with reduced volume and power consumption, enabling simultaneous detection of multiple gases by integrating heating regions with different temperatures, improving integration and detection capabilities.
Implementation Method 1
a heating layer disposed on the silicon-based substrate. The heating layer integrates heating electrodes of different sizes or different layouts to form a plurality of heating regions of different temperatures
Implementation Method 2
When a MOS material is exposed to a gas to be measured, the resistivity of the MOS material changes obviously due to adsorption of the gas on the surface of the MOS material
Implementation Method 3
Chemical adsorption means that ionic adsorption is established between the gas and the surface of the MOS material, and electron exchange and chemical bond are present
Data Source
AI summary
A gas sensor has a sensing structure that is used for generating, for a variety of gases, multiple corresponding electric signals. It has a plurality of measuring electrodes and a gas-sensitive film coating the measuring electrodes; and a micro-heating structure that is used for providing different heating temperatures for the sensing structure, and a silicon-based substrate and a heating layer disposed on the silicon-based substrate. The heating layer integrates heating electrodes of different sizes or different layouts to form a plurality of heating regions of different temperatures, and the plurality of measuring electrodes are respectively disposed in the corresponding heating regions. By integrating heating electrodes of different sizes or different layouts on a single micro-heating structure to form heating regions of different temperatures, a complex atmosphere detection function of a variety of sensing materials at different temperatures is achieved.