PFA Material Polysiloxane Filler ESD Resistance
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Solution Overview
Problem
Current polymer film on array (PFA) materials experience a significant reduction in effective breakdown field strength due to structural unevenness and electric field non-uniformity, which affects the quality of thin film transistor liquid crystal displays (TFT-LCDs) by increasing the risk of electrostatic discharge (ESD).
Innovation Solution
A PFA material comprising a polysiloxane resin dispersion liquid, a boron nitride nanoparticle dispersion liquid, and a solvent, where the polysiloxane acts as a main filler, ensuring dispersibility and electric field uniformity, and boron nitride nanoparticles enhance thermal conductivity to reduce heat generation during surface discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If high-dielectric ceramic particles or conductive particles are filled in the polymer to improve breakdown characteristics, then the dielectric strength is improved, but the electric field uniformity deteriorates due to dielectric constant difference causing non-uniform mixing and structural non-uniformity
Solution Approach 1:
The patent changes the dielectric constant parameter of the filler material from high-dielectric ceramic (large difference with polymer matrix) to silicon oxide with dielectric constant of 3.9 (close to polymer matrix). This parameter change resolves the contradiction by maintaining breakdown strength improvement while achieving electric field uniformity.
Solution Approach 2:
The patent uses silicon oxide particles that closely match the dielectric constant of the polymer matrix, creating a homogeneous composite structure. This homogeneity prevents electric field distortion and non-uniform mixing, resolving the contradiction between strength improvement and composition stability.
2Strength
If conventional PFA material with inorganic filler is used, then breakdown characteristics are improved, but manufacturing precision deteriorates due to non-uniform mixing and structural non-uniformity
Solution Approach 1:
The patent changes the filler material parameters to silicon oxide with specific properties (dielectric constant 3.9, particle size 0.1-10 μm). These parameter changes enable uniform mixing and consistent structural properties, improving manufacturing precision while maintaining breakdown characteristics.
Solution Approach 2:
By selecting silicon oxide particles with properties matching the polymer matrix, the patent achieves homogeneous distribution and consistent structural uniformity throughout the composite material, resolving the manufacturing precision issue.
3Productivity
If the substrate is continuously moved and processed through rubbing, adsorption, heating, pressurization, and cooling, then production efficiency is improved, but electrostatic discharge risk increases due to continuous static electricity generation
Solution Approach 1:
The patent creates a composite material combining polymer matrix with silicon oxide particles and conductive filler. This composite structure provides both the mechanical properties needed for continuous processing and enhanced ESD resistance, resolving the contradiction between productivity and reliability.
Solution Approach 2:
The patent introduces an intermediary layer with specific electrical properties that mediates between the processing requirements (continuous movement, heating, pressurization) and ESD protection needs. This intermediary composite structure allows continuous processing while dissipating static electricity safely.
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 improves the dispersibility and electric field uniformity of the PFA material, enhancing its thermal conductivity and ESD breakdown resistance by forming a silicon oxycarbon polymer structure with a dielectric constant close to the PFA resin, thereby reducing the impact of electrostatic discharge.
Implementation Method 1
the final product formed by condensation of the polysiloxane after high-temperature baking is a silicon oxycarbon polymer
Implementation Method 2
boron nitride nanoparticles enhance thermal conductivity to reduce heat generation during surface discharge
Data Source
AI summary
The present invention provides a polymer film on array (PFA) material and a preparation method thereof. The PFA material includes a polymer film on array (PFA) resin, a polysiloxane resin dispersion liquid, and a solvent, wherein the PFA resin ranges from 1 to 25% by weight relative to a total weight of the PFA material, and the polysiloxane resin dispersion liquid ranges from 1 to 30% by weight relative to a total weight of the PFA material.