Silver-Coated Silicone Rubber Conductive Paste
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Solution Overview
Problem
Conventional electrically conductive pastes struggle to maintain high reliability, stretchability, and electrical conductivity over long-term use due to oxidation and deterioration of polymers with unsaturated bonds, and require complex preparation processes.
Innovation Solution
An electrically conductive paste comprising a solvent, a binder resin without unsaturated bonds, and silver-coated resin particles with a silicone rubber core and silver coating, where the silver-coated particles are dispersed at 30-75 vol.% to ensure stretchability and electrical conductivity without polymer degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an aqueous dispersion of conjugated double bond polymer with polymeric polyanion dopant is used to achieve high electrical conductivity, then the electrical conductivity is improved, but the preparation process becomes complex and time-consuming
Solution Approach 1:
The patent extracts and eliminates the complex polymeric polyanion dopant system from the conventional formulation. Instead, it uses silver-coated resin particles where the silver itself provides the electrical conductivity function, simplifying the preparation process and reducing formulation complexity while maintaining high conductivity.
Solution Approach 2:
The patent changes the electrical conductivity mechanism from relying on polymeric polyanion dopants in conjugated polymers to relying on silver-coated resin particles. This parameter change in the conductivity mechanism simplifies the preparation process and reduces the number of formulation steps required.
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 solution provides an electrically conductive film that maintains high stretchability and electrical conductivity while resisting oxidation and deterioration, ensuring reliability and simplifying the formation process.
Implementation Method 1
silver-coated resin particles as an electrically conductive filler dispersed in the binder resin, wherein the silver-coated resin particle contains a resin core particle comprising a silicone rubber particle, and a silver coating layer covering the surface of the resin core particles
Implementation Method 2
resin core particle comprising a silicone rubber particle
Data Source
AI summary
This electrically conductive paste contains a solvent, a binder resin that does not contain unsaturated bonds within the molecules, and silver-coated resin particles as an electrically conductive filler dispersed in the binder resin. The silver-coated resin particles include resin core particles comprising silicone rubber particles, and a silver coating layer covering the surface of the resin core particles. Furthermore, the average grain diameter of the silver-coated resin particles is 0.5-20 μm, and the silver-coated resin particles are contained at 30-75 vol. % with respect to 100 vol. % of the solids content of the electrically conductive paste.