Stretchable Conductive Pattern Using Segmented Closed Loops
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Solution Overview
Problem
Existing stretchable devices face challenges in maintaining conductivity and durability when subjected to stretching forces, as conventional conductive patterns tend to damage or lose functionality under tension.
Innovation Solution
A stretchable conductive pattern comprising interconnected first and second closed loop parts and line parts, formed integrally with each other, which are designed to distribute stress laterally, preventing damage and maintaining conductivity when stretched in multiple directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional conductive patterns are used in stretchable devices, then the device can be made stretchable, but the conductive pattern damages or loses functionality under stretching forces
Solution Approach 1:
The conductive pattern is divided into multiple closed loop parts connected by line parts, creating segmented sections that can independently deform during stretching. This segmentation allows each part to accommodate strain locally while maintaining overall conductivity, preventing the pattern from failing under tension.
Solution Approach 2:
The conductive pattern employs closed loop shapes with curved geometries instead of straight lines. These curved configurations allow the pattern to distribute and accommodate stretching forces more effectively, as the curvature enables gradual deformation and stress distribution throughout the loop structure, preventing concentrated damage.
2Reliability
If the conductive pattern is made continuous to ensure conductivity, then conductivity is maintained, but the pattern becomes vulnerable to damage when stretched
Solution Approach 1:
The continuous conductive path is segmented into closed loop parts connected by line parts. This segmentation maintains electrical continuity while allowing each segment to deform independently during stretching, distributing mechanical stress and preventing catastrophic failure of the entire pattern.
Solution Approach 2:
The closed loop structure provides built-in mechanical cushioning capacity before stretching occurs. The loop geometry allows for elastic deformation and stress redistribution, cushioning the conductive pattern against damage during subsequent stretching events.
3Device complexity
If the conductive pattern uses simple linear connections, then the structure is simple, but it cannot distribute stress effectively when stretched in multiple directions
Solution Approach 1:
The pattern is segmented into closed loop parts that can deform independently, allowing stress to be distributed across multiple sections rather than concentrated in single linear paths. This segmentation enables effective stress distribution in multiple directions while maintaining relative structural simplicity.
Solution Approach 2:
The conductive pattern transitions from one-dimensional linear connections to two-dimensional closed loop structures. This dimensional change enables the pattern to accommodate and distribute stress in multiple directions simultaneously, as the loops can deform in various orientations while maintaining connectivity.
Data Source
AI summary
A stretchable conductive pattern includes a plurality of first closed loop parts spaced apart from each other in a first direction, and at least one first line part extended in the first direction and connecting between adjacent first closed loop parts among the plurality of first closed loop parts.