Stretchable Composite Substrate With Shape-Changing Dielectric Clusters
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Solution Overview
Problem
Existing stretchable dielectric materials exhibit irregular changes in dielectric constant when stretched, making them unsuitable for maintaining frequency stability in high-frequency devices of stretchable systems.
Innovation Solution
A composite substrate comprising a stretchable polymer matrix and dielectric clusters formed from dielectric powder, where the shape of the clusters changes upon stretching to linearly decrease the dielectric constant, with a variable range of 0.1% to 30% and a gradient of 0.03 to 0.08, and includes materials like ecoflex and metal oxides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a polymer elastomer is used as a stretchable dielectric material, then elasticity is improved, but dielectric constant changes irregularly when stretched
Solution Approach 1:
The patent combines polymer elastomer with metal oxide particles to create a composite dielectric material. The polymer matrix provides elasticity and stretchability, while the metal oxide particles contribute to stable dielectric properties. This composite structure allows the material to maintain both mechanical flexibility and electrical stability during stretching operations.
Solution Approach 2:
The patent controls the dielectric constant by adjusting parameters such as metal oxide particle concentration, particle size distribution, and polymer matrix composition. By optimizing these parameters, the material achieves a dielectric constant that remains stable across different strain levels, resolving the irregular variation problem.
2Reliability
If metal oxide particles are added to polymer elastomer, then dielectric properties are improved, but manufacturing complexity increases
Solution Approach 1:
The patent performs preliminary surface treatment on metal oxide particles before incorporation into the polymer matrix. This pre-treatment optimizes particle-polymer interfacial adhesion and ensures uniform distribution, simplifying subsequent processing steps and reducing manufacturing complexity while maintaining excellent dielectric properties.
Solution Approach 2:
The patent creates regions with different metal oxide concentrations or particle sizes within the polymer matrix to optimize local dielectric properties. This localized optimization allows the material to achieve superior overall dielectric performance without requiring complex uniform structures throughout the entire material.
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 composite substrate maintains frequency stability and thermal conductivity in high-frequency devices of stretchable systems, ensuring consistent performance even under stretching conditions.
Implementation Method 1
a stretchable polymer matrix formed of a stretchable polymer having elasticity; and a dielectric cluster having a predetermined shape, included in the polymer matrix, and formed of dielectric powder having dielectric properties, in which when the composite substrate is stretched, the predetermined shape of the dielectric cluster may change so that a dielectric constant of the composite substrate may be varied
Data Source
AI summary
Provided is a composite substrate having a variable dielectric constant, the composite substrate comprising: a stretchable polymer matrix formed of a stretchable polymer having elasticity; and a dielectric cluster having a predetermined shape, the dielectric cluster being contained in the polymer matrix and formed from a dielectric powder having dielectric properties, wherein when the composite substrate is stretched, the predetermined shape of the dielectric cluster changes and thus the dielectric constant changes.