Folded Electrode Device for Electrochemical Sensor Chip
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Solution Overview
Problem
Existing electrochemical sensor chip electrode devices face issues with reduced sensitivity due to long conduction paths and electromagnetic noise, and are not suitable for multi-point measurements or as disposable products, especially when dealing with liquid samples that can cause short-circuiting.
Innovation Solution
An electrode device with an insulation sheet and conductive electrode members that pierce through the sheet, forming recesses to trap analytes and connect to a transducer, reducing conduction paths and preventing sample infiltration, while being designed for compactness and disposability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a planar electrode device with long conduction path is used, then the electrode device can be formed by printing method to reduce manufacturing costs, but the detection sensitivity is reduced due to electromagnetic noise
Solution Approach 1:
The patent transitions from a planar two-dimensional electrode structure to a three-dimensional folded electrode structure. The electrode member is folded multiple times to increase the effective electrode area and reduce the conduction path length within the insulation substrate, thereby reducing electromagnetic noise interference while maintaining manufacturing feasibility through printing methods
2Ease of manufacture
If a planar electrode device is used, then the manufacturing process is simple, but the size of the electrode device is increased and multi-point measuring requires large size
Solution Approach 1:
The patent utilizes the thickness dimension of the insulation substrate to fold the electrode member multiple times, transforming a two-dimensional planar layout into a three-dimensional compact structure. This allows multiple measurement points to be integrated within a small footprint, enabling multi-point measurement without increasing the overall device area
3Measurement precision
If an integrated circuit chip with electrode is used, then additional circuit for amplifying current can be integrated to achieve high-sensitive measurement, but the sample can infiltrate through fine cracks causing short-circuiting and reducing reliability
Solution Approach 1:
The patent introduces an insulation substrate as an intermediary barrier between the electrode and the liquid sample. The insulation substrate with its insulating properties prevents sample infiltration through cracks and eliminates short-circuiting risks, while the folded electrode structure maintains electrical connectivity for sensitive measurements
Solution Approach 2:
The patent employs a thin film insulation substrate that provides effective isolation between the electrode and the liquid sample. This thin film structure prevents sample penetration while maintaining the electrical functionality needed for sensitive detection, thereby improving reliability without sacrificing measurement capability
4Measurement precision
If an integrated circuit chip with electrode is used, then high-sensitive measurement can be achieved, but the electrode cannot be removed for disposal making it unsuitable as a disposable product
Solution Approach 1:
The patent divides the electrode device into separable components: a disposable electrode member attached to an insulation substrate, which can be easily detached from the integrated circuit chip. This segmentation allows the electrode assembly to be disposed of after use while the circuit chip remains reusable, enabling disposable product functionality without sacrificing measurement sensitivity
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
Enhances measurement sensitivity and reliability by reducing electromagnetic noise interference and preventing short-circuits, allowing for compact, multi-point measurements and use as a disposable product.
Implementation Method 1
electrode members having a conductivity and held by the insulation sheet in portions piercing the insulation sheet
Implementation Method 2
recesses for trapping the analyte being formed in the top surface of the insulation sheet
Data Source
AI summary
An electrode device for an electrochemical sensor chip includes an insulation sheet having an insulating property and including a top surface and a bottom surface opposite to each other in a thickness direction, and electrode members having a conductivity and held by the insulation sheet in portions piercing the insulation sheet in a thickness direction, one ends of the electrode members located on the top surface side of the insulation sheet being connected to the analyte, other ends located on the bottom surface side of the insulation sheet being connected to the electrodes of the transducer, recesses for trapping the analyte being formed in the top surface of the insulation sheet so as to correspond to the electrode members, the one ends of the electrode members being exposed at a bottom of the recesses.