Gas Sensor Conductive Layer Segmentation for Thickness Uniformity
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Solution Overview
Problem
Existing gas detection sensors face accuracy issues due to uneven thickness of the conductive resistor, leading to unreliable substance detection.
Innovation Solution
A substance detection sensor is designed with an insulating layer, two electrodes, and a conductive layer formed in multiple layers to ensure uniform thickness, connected by wires to maintain accurate electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the solution is applied onto the first and the second conductive leads to collectively form the resistor at a time, then the manufacturing process is simple, but the resistor is formed in uneven thickness
Solution Approach 1:
The conductive layer is divided into multiple separate conductive layers (first conductive layer and second conductive layer) that are formed independently on different conductive leads. This segmentation allows each layer to be formed with controlled thickness on its respective lead, preventing the uneven thickness that occurs when a single solution is applied to multiple leads simultaneously.
2Area of stationary object
If the resistor is formed to have a large area, then the detection coverage is increased, but the thickness becomes considerably uneven
Solution Approach 1:
The large-area resistor is segmented into multiple conductive layers distributed across different conductive leads. Each individual layer maintains a manageable area with uniform thickness, while the collective arrangement of these layers provides the desired large detection coverage. This segmentation strategy resolves the conflict between area size and thickness uniformity.
Solution Approach 2:
Each conductive layer is formed with specific local characteristics optimized for its position and function. The thickness and material properties can be locally adjusted for each layer to ensure uniformity within that layer, while the overall system achieves large area coverage through the distributed arrangement of these locally-optimized layers.
3Measurement precision
If the conductive layer is formed in uniform thickness by dividing into plural layers, then the substance detection accuracy is improved, but the device complexity increases
Solution Approach 1:
The conductive layer is segmented into multiple independent layers formed on separate conductive leads. This segmentation enables uniform thickness control for each layer, which directly improves substance detection accuracy. While the structure becomes more complex, the modular nature of segmented layers simplifies the manufacturing process compared to forming a single large uniform layer.
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
This configuration allows for precise detection of substances by ensuring uniform thickness and reliable electrical connections, enhancing the accuracy of gas detection.
Implementation Method 1
a conductive layer formed between the two electrodes so as to electrically connect the two electrodes, and of which a swelling ratio varies depending on the type and/or amount of a specific gas
Data Source
Figure 1~2
Figure 3(a)~3(d)
Figure 4
AI summary
A substance detection sensor includes an insulating layer(2); two electrodes spaced (5A,5B) in opposed relation to each other on the insulating layer; and conductive layers (4A,4B) formed between the two electrodes on the insulating layer so as to electrically connect the two electrodes, and of which a swelling ratio varies depending on the type and/or amount of a specific gas. The conductive layers are formed by dividing into plural layers between the two electrodes.