Stretchable Composite Substrate with Shape-Changing Dielectric Clusters
Find Innovative SolutionsGenerate Solutions
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 flexible systems.
Innovation Solution
A composite substrate comprising a stretchable polymer matrix with embedded dielectric clusters formed from dielectric powder, where the shape of the clusters changes upon stretching to linearly decrease the dielectric constant, maintaining frequency stability and thermal conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a polymer elastomer is used as a stretchable dielectric, 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 when stretched.
Solution Approach 2:
The patent controls the dielectric constant by adjusting the concentration, size distribution, and spatial arrangement of metal oxide particles within the polymer matrix. 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 material is used for dielectric, then dielectric properties are improved, but elasticity is lost
Solution Approach 1:
The patent creates a composite structure where metal oxide particles are dispersed within a polymer elastomer matrix. The polymer continuous phase provides the necessary elasticity and stretchability, while the dispersed metal oxide particles contribute high-k dielectric properties. This composite approach allows simultaneous achievement of both dielectric performance and mechanical flexibility.
Solution Approach 2:
The patent creates local regions of high dielectric constant around metal oxide particles while maintaining overall material elasticity through the polymer matrix. The metal oxide particles are distributed throughout the polymer, creating localized dielectric enhancement without compromising the bulk material's mechanical properties.
3Adaptability or versatility
If existing stretchable dielectric is used, then flexibility is improved, but frequency stability in high-frequency devices deteriorates
Solution Approach 1:
The patent develops a composite dielectric material combining polymer elastomer and metal oxide particles that maintains stable dielectric properties under strain. This stability ensures that high-frequency devices such as antennas and capacitors maintain their operating frequencies even when the flexible substrate is stretched, thereby preserving frequency stability while enabling flexibility.
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 achieves a linear and rapid decrease in dielectric constant with a gradient of 0.03 to 0.08 in a 0.1% to 30% stretch range, ensuring frequency stability and excellent thermal conductivity for high-frequency devices in flexible systems.
Implementation Method 1
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
Figure 1
Figure 2
Figure 3
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.