Polyphenylene Ether Resin Composition for High-Frequency PCBs
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Solution Overview
Problem
Conventional printed circuit board laminates prepared with epoxy resins have high dielectric constants, high dissipation factors, and high water absorption rates, which deteriorate signal transmission quality, failing to meet requirements for high-frequency and high-speed signal transmission in smaller, lighter, and thinner electronic products, and polyphenylene ether resin's poor heat resistance and incompatibility with epoxy resin limit its usage.
Innovation Solution
A polyphenylene ether-based resin composition combining polyphenylene ether resin with triallyl isocyanurate (TAIC) and a specific metallic salt compound as a hardening promoter, forming an interpenetrating polymer network to enhance physicochemical and electrical properties, including improved peeling strength, water resistance, and reduced dielectric constant and dissipation factor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If epoxy resin is used to prepare laminates, then heat resistance and mechanical strength are improved, but dielectric constant, dissipation factor, and water absorption rate increase, deteriorating signal transmission quality
Solution Approach 1:
The patent uses a composite resin system combining polyphenylene ether (PPE) resin as the base resin with epoxy resin as a modifier. This composite approach allows the laminate to inherit the low dielectric constant and low water absorption characteristics of PPE while gaining the heat resistance and mechanical strength of epoxy resin, thereby resolving the contradiction between heat resistance and signal transmission quality
Solution Approach 2:
The patent modifies the resin composition by controlling the weight ratio of PPE resin to epoxy resin, and by adding specific additives including silane-modified PPE resin, flame retardants, and fillers. These parameter changes enable optimization of both heat resistance and electrical properties simultaneously
2Reliability
If polyphenylene ether resin is used to improve electrical properties, then dielectric constant and dissipation factor are reduced, but heat resistance deteriorates and compatibility with epoxy resin is poor
Solution Approach 1:
The patent creates a composite resin system where polyphenylene ether resin is combined with epoxy resin in specific proportions. This composite structure allows the PPE component to provide excellent electrical properties (low dielectric constant and low dissipation factor) while the epoxy component contributes heat resistance, thereby resolving the contradiction between electrical properties and heat resistance
Solution Approach 2:
The patent introduces silane-modified polyphenylene ether resin as a local modifier within the resin system. This modified resin component improves compatibility between PPE and epoxy resin locally, enabling better dispersion and interfacial adhesion, thus resolving the compatibility issue while maintaining the electrical property benefits of PPE
3Reliability
If polyphenylene ether resin is combined with epoxy resin to improve electrical properties, then dielectric properties are enhanced, but processing difficulty increases due to poor compatibility
Solution Approach 1:
The patent introduces silane-modified polyphenylene ether resin as a local modifier within the resin system. This modified resin component improves compatibility between PPE and epoxy resin locally, enabling better dispersion and interfacial adhesion, thus resolving the compatibility issue while maintaining the electrical property benefits of PPE
Solution Approach 2:
The silane-modified PPE resin acts as an intermediary substance that bridges the incompatible PPE and epoxy resin phases. The silane modification introduces functional groups that can interact with both PPE and epoxy, facilitating相容性 and improving overall processability of the composite resin system
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 achieves satisfactory physicochemical properties, excellent peeling strength, and improved electrical properties, such as low water absorption and reduced dielectric constant and dissipation factor, making it suitable for high-frequency and high-speed signal transmission applications.
Implementation Method 1
a hardening promoter, which is a metallic salt compound of the following formula (II)... the amount of the hardening promoter (c) is about 0.1 wt % to less than 15 wt % based on the total weight of the resin (a) and the first hardener (b)
Data Source
AI summary
A resin composition, comprising:(a) a resin of formula (I):(b) triallyl isocyanurate (TAIC) as a first hardener; and(c) a hardening promoter, which is a metallic salt compound of formula (II):wherein, R1, R2, R3, R4, A1, A2, Ma+, b, and n are as defined in the specification, and wherein the weight ratio of the resin (a) to the first hardener (b) is about 10:1 to about 1:1, and the content of the hardening promoter (c) is about 0.1 wt % to less than 15 wt % based on the total weight of the resin (a) and the first hardener (b), and the weight ratio of the resin (a) to the total amount of the first hardener (b) and BMI is not lower than 1:1.