Skin-Adhered Biosensor Electrode Lattice to Prevent Peeling
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Solution Overview
Problem
Conventional biocompatible polymer substrates used in biosensors are prone to peeling off from the skin due to folding or motion, leading to unstable electrical conductivity.
Innovation Solution
A biosensor design incorporating a pressure-sensitive adhesive layer with a conductive electrode and circuit part, featuring a lattice-patterned electrode with controlled hole configurations to enhance adhesion and maintain electrical conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a polymer layer is affixed to the skin to enable electrode contact, then the electrode can detect biological signals, but the polymer layer is prone to folding and peeling off due to skin motion, leading to unstable electrical conductivity
Solution Approach 1:
The electrode is divided into multiple segments with through-holes, allowing the adhesive layer to contact the skin through these holes while maintaining electrical conductivity paths. This segmentation prevents peeling by distributing adhesion points while preserving conductive continuity.
Solution Approach 2:
The electrode incorporates a lattice pattern of through-holes creating a porous structure that allows the adhesive layer to penetrate and bond with the skin through these openings. This porous design enables stable adhesion while maintaining electrical conductivity through the remaining solid portions of the electrode.
2Stability of the object's composition
If the electrode is made with a continuous structure to maintain electrical conductivity, then signal detection is stable, but the adhesive layer is more susceptible to peeling off from the biological surface
Solution Approach 1:
The electrode uses a porous lattice structure with controlled through-holes that allows adhesive penetration while maintaining conductive pathways. The porosity enables the adhesive to bond through the holes to the skin, preventing peeling, while the remaining continuous material maintains electrical conductivity.
Solution Approach 2:
The electrode combines conductive material with an adhesive layer in a composite structure where the adhesive penetrates through-holes to bond with the skin. This composite design integrates both adhesion and conductivity functions, with the adhesive providing mechanical bonding and the conductive material providing electrical signal transmission.
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 design effectively suppresses peeling of the adhesive layer from the biological surface while maintaining stable electrical conductivity, ensuring reliable signal detection.
Implementation Method 1
a pressure-sensitive adhesive layer to be affixed to a biological surface
Data Source
AI summary
A biosensor according to the present invention includes a pressure-sensitive adhesive layer to be affixed to a biological surface; an electrode arranged to be capable of contacting the biological surface on a side of the pressure-sensitive adhesive layer to be affixed to the biological surface; an electronic device configured to process a biological signal obtained via the electrode; and a circuit part connecting the electrode and the electronic device, wherein the electrode has a connecting surface connected to the circuit part on a side affixed to the biological surface.