Resin Composition for Capacitor Dielectric Layers
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Solution Overview
Problem
Printed circuit boards in electronic communication devices face challenges in maintaining stable capacitance and adhesion of capacitors under high temperature and high humidity conditions, leading to potential noise issues and reduced functionality.
Innovation Solution
A resin composition comprising epoxy resin, active ester resin, aromatic polyamide resin, and a dielectric filler is used as a dielectric layer, ensuring high adhesion and maintaining capacitance stability by preventing migration of metal constituents and maintaining interlayer insulation properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional resin compositions are used for capacitor dielectric layers, then manufacturing is simpler, but capacitance and dielectric constant decrease under high temperature and high humidity
Solution Approach 1:
The patent uses a composite resin system combining epoxy resin, active ester resin, and aromatic polyamide resin. This multi-component composite provides superior resistance to capacitance and dielectric constant degradation under high temperature and humidity compared to conventional single-resin systems, directly resolving the reliability-stability contradiction.
Solution Approach 2:
The patent specifies precise compositional parameters for the resin system (epoxy resin 20-80 parts, active ester resin 20-80 parts, aromatic polyamide resin 1-50 parts based on 100 parts resin component) and dielectric filler content (65-85 wt%). These controlled parameter ranges optimize the dielectric layer's stability under severe environmental conditions while maintaining manufacturing feasibility.
2Reliability
If the resin layer adhesion is improved, then capacitor reliability increases, but manufacturing complexity increases
Solution Approach 1:
The aromatic polyamide resin component specifically enhances adhesion between the dielectric layer and copper foils while the epoxy and active ester resins provide structural integrity. This composite approach achieves superior adhesion without requiring complex surface treatments or additional adhesion layers, balancing reliability improvement with manufacturing simplicity.
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 resin composition effectively reduces capacitance and dielectric constant degradation under high temperature and humidity, ensuring high adhesion and prolonged insulation reliability, thus enhancing the functionality of capacitors in printed circuit boards.
Implementation Method 1
maintaining capacitance stability by preventing migration of metal constituents and maintaining interlayer insulation properties
Implementation Method 2
reduces capacitance and dielectric constant degradation under high temperature and humidity
Data Source
AI summary
A resin composition for use in a dielectric layer of a capacitor device or a capacitor-embedded printed circuit board is provided in which the resin composition can improve stability in capacitance and insulation properties of the capacitor device under high temperature and high humidity and ensures high adhesion of the dielectric layer to the device. The resin composition comprises a resin component and a dielectric filler. The resin component comprises an epoxy resin, an active ester resin, and an aromatic polyamide resin.