Biopotential Electrode with Embedded Circuit Substrate
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Solution Overview
Problem
Existing biopotential measurement electrodes with flexible resin electrodes and signal processing circuits experience unstable electrical coupling due to mechanical coupling with metal clasps, leading to reliability issues and limited usability.
Innovation Solution
A biopotential measurement electrode design where a substrate with an electrical circuit is embedded in a conductive and elastic second electrode unit, increasing the contact area and ensuring stable electrical coupling, and a biological information measurement device incorporating this electrode for improved reliability and user-friendliness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal clasp is used to mechanically couple the flexible electrode and substrate, then the structure is simple and easy to manufacture, but the electrical coupling becomes unstable due to body motion
Solution Approach 1:
The patent merges the mechanical coupling function and electrical coupling function into a single integrated substrate structure. The substrate simultaneously provides mechanical support and electrical connection, eliminating the need for separate metal clasps. This integration resolves the contradiction by achieving stable electrical coupling through the unified substrate while maintaining manufacturing simplicity.
Solution Approach 2:
The patent introduces a conductive adhesive layer as an intermediary between the flexible electrode and substrate. This adhesive layer provides both mechanical bonding and electrical conduction, mediating the connection between the two components. The conductive adhesive resolves the instability issue by creating a more reliable interface that accommodates body motion while maintaining electrical coupling.
2Reliability
If the contact area between substrate and second electrode is increased, then electrical coupling reliability improves, but the device size increases
Solution Approach 1:
The patent applies local quality by concentrating the conductive adhesive material specifically at the interface regions where electrical coupling is needed, rather than uniformly increasing the substrate area. The conductive adhesive is localized to the contact zones between the substrate and flexible electrode, providing enhanced electrical coupling reliability only where required, thus avoiding unnecessary increase in overall device size.
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 embedded substrate design enhances the electrical and mechanical reliability of the biopotential measurement electrode, reducing noise and impedance, and allows for a more compact and user-friendly biological information measurement device.
Implementation Method 1
a second electrode unit having conductivity and elasticity and in which at least a part of the first electrode unit is embedded
Implementation Method 2
a second electrode unit having conductivity and elasticity and in which at least a part of the first electrode unit is embedded, the second electrode unit being to be brought into contact with a living body
Data Source
AI summary
An electrode of an embodiment of the present disclosure includes: a substrate on which an electrical circuit is mounted; a first electrode unit disposed on the substrate and electrically coupled to the electrical circuit; and a second electrode unit having conductivity and elasticity and in which at least a part of the first electrode unit is embedded, the second electrode unit being to be brought into contact with a living body.