Micro Channel Electrode Orientation for Concentration Detection
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Solution Overview
Problem
Conventional micro channel structure bodies fail to accurately detect the concentration of liquids and target substances due to electrode placement only at the bonded surface, leading to non-uniform concentration detection across the channel cross-section.
Innovation Solution
A micro channel structure body with a laminate configuration where substrates and electrodes are sequentially laminated, forming a micro channel with an inner surface at an acute angle to the lamination direction, allowing multiple electrodes to be exposed in the lamination and channel directions, enhancing detection sensitivity and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the electrode part is formed only at the bonded surface between substrates, then the structure is simple and manufacturing is easy, but the concentration detection accuracy deteriorates because the electrode cannot detect non-uniform concentration distribution across the channel cross-section
Solution Approach 1:
The patent transitions from a two-dimensional electrode arrangement (single plane at bonded surface) to a three-dimensional arrangement by forming the electrode part to extend along the channel length direction. This dimensional change allows the electrode to interact with liquid at multiple positions along the channel, enabling accurate detection of concentration distribution while maintaining manufacturing simplicity through a single continuous electrode structure.
2Measurement precision
If multiple electrodes are arranged along the channel direction, then concentration distribution can be detected accurately, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The electrode part is segmented into multiple detection regions along the channel length direction, with each segment capable of detecting concentration at its position. This segmentation is achieved by forming the electrode material in a patterned arrangement that creates multiple active detection zones, enabling concentration distribution measurement while maintaining a unified manufacturing process.
Solution Approach 2:
Multiple electrode functions are merged into a single integrated electrode part structure. Instead of fabricating and assembling separate electrodes at different positions, the invention combines all detection functions into one continuous electrode component formed in a single manufacturing step, reducing fabrication complexity while achieving multi-point concentration detection.
3Measurement precision
If the inner surface of the micro channel is formed at an acute angle to the lamination direction, then the electrode exposure area is enlarged and detection sensitivity is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent optimizes the inner surface angle parameter of the micro channel, specifying that it should be an acute angle relative to the lamination direction. This parameter change enlarges the exposure area of the electrode part along the channel length, thereby increasing detection sensitivity. The acute angle configuration is achieved through controlled formation processing that accounts for the acute angle between the inner surface and lamination direction.
Data Source
AI summary
A micro channel structure body 10 in which a micro channel 3 having a predetermined cross-sectional shape is formed in a laminate where substrates 1a, 1b, and 1c having formed thereon electrodes 2a, 2b, and 2c made of a thin film are laminated sequentially. The above-mentioned micro channel 3 is formed in a perpendicular direction β perpendicular to a lamination direction α of the above-mentioned laminate. Inner surfaces 3a and 3b of the above-mentioned micro channel 3 have an acute angle θ with respect to the lamination direction α of the above-mentioned laminate. The above-mentioned plurality of electrodes 2a, 2b, and 2c are formed and exposed in the lamination direction α of the inner surfaces 3a and 3b of the above-mentioned micro channel 3.