Composite Film Electret for High-Temperature Charge Stability
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Solution Overview
Problem
Existing electret materials face challenges in thermal stability and performance deterioration in high-temperature environments, with organic polymer-based electrets offering shape freedom but poor thermal stability, and inorganic bulk sintered bodies being difficult to apply on device substrates with limited film thickness control.
Innovation Solution
An electret layer formed by subjecting a composite film with inorganic dielectric particles, having a bandgap energy of 4 eV or more, dispersed in a base film to a polarization treatment, allowing for improved thermal stability, controllable film thickness, and high surface potential.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If organic polymer-based electrets are used, then shape freedom and ease of film formation are improved, but thermal stability deteriorates
Solution Approach 1:
The invention uses a composite structure consisting of inorganic dielectric particles dispersed in an organic polymer matrix. The inorganic particles provide thermal stability and electret properties, while the organic polymer provides shape freedom and ease of film formation. This composite approach resolves the contradiction by combining materials with complementary properties.
2Stability of the object's composition
If inorganic bulk sintered bodies are used, then thermal stability is improved, but ease of application on device substrates and film thickness control deteriorates
Solution Approach 1:
The invention forms the electret layer as a thin film with thickness of 1 μm to 100 μm that can be applied on device substrates. The organic polymer matrix allows the inorganic dielectric particles to be dispersed and formed into flexible thin films, enabling easy application on device substrates while maintaining the thermal stability of inorganic materials.
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 electrets that are thermally stable, easily controllable in film thickness, and suitable for high-temperature environments, with enhanced durability and performance stability over time.
Implementation Method 1
The inorganic dielectric particles are mainly composed of an inorganic dielectric material having a bandgap energy of 4 eV or more
Implementation Method 2
The electret layer is formed by subjecting a composite film in which inorganic dielectric particles are dispersed and held in a base film to a polarization treatment
Data Source
AI summary
An electret includes an electret layer. The electret layer is formed by subjecting a composite film in which inorganic dielectric particles are dispersed and held in a base film to a polarization treatment. The inorganic dielectric particles are mainly composed of an inorganic dielectric material having a bandgap energy of 4 eV or more.