Elastic Wiring Board Ion Migration Resistance
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Solution Overview
Problem
Existing elastic wiring boards with lower moisture permeability interlayers still experience ion migration due to moisture absorption by the elastic substrate, leading to reduced insulation resistance and ion diffusion.
Innovation Solution
Incorporating an ion-migration resistant layer, either an insulating layer with low moisture absorption or a moisture repellent layer, between the electrode wirings and the elastic substrate to block metal ion diffusion, thereby suppressing ion migration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an interlayer elastic substrate with lower moisture permeability is arranged between main surfaces, then the occurrence of ion migration is reduced, but the elastic substrate that has absorbed moisture still causes ion migration
Solution Approach 1:
An ion-migration resistant layer is introduced as an intermediary component between the electrode wiring and the elastic substrate. This layer acts as a mediator that blocks the diffusion path of metal ions while allowing the elastic substrate to maintain its moisture absorption characteristics for flexibility and biocompatibility.
Solution Approach 2:
The patent employs composite material structure by combining the elastic substrate with an ion-migration resistant layer having different material properties. The composite structure leverages the elasticity and flexibility of the substrate while the resistant layer provides barrier properties against ion diffusion, creating a multi-functional integrated system.
2Reliability
If the moisture permeability of the interlayer elastic substrate is lowered, then ion migration is suppressed, but the elastic substrate still absorbs moisture from the environment
Solution Approach 1:
The ion-migration resistant layer serves as a protective intermediary that decouples the relationship between moisture content and ion migration. It allows the elastic substrate to absorb moisture for maintaining flexibility while preventing that moisture from facilitating ion diffusion between electrode wirings.
Solution Approach 2:
The patent applies local quality modification by adding the ion-migration resistant layer specifically at critical interfaces where ion migration occurs (between electrode wirings and substrate), while leaving the bulk elastic substrate properties unchanged to maintain overall flexibility and moisture absorption capacity.
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 ion-migration resistant layer effectively prevents metal ion diffusion, even when the elastic substrate is moist, enhancing the ion migration resistance of the elastic wiring board.
Implementation Method 1
an ion-migration resistant layer between at least a first electrode wiring of the plurality of electrode wirings and the elastic substrate
Implementation Method 2
the insulating layer having low moisture absorption hardly diffuses metal ions, regardless of whether the elastic substrate has absorbed moisture
Implementation Method 3
the moisture repellent layer has a property of blocking the movement of water with the moisture repellent layer interposed therebetween
Data Source
AI summary
An elastic wiring board that includes an elastic substrate; a plurality of electrode wirings having elasticity; and an ion-migration resistant layer between at least a first electrode wiring of the plurality of electrode wirings and the elastic substrate.