Unsaturated Polyphenylene Ether Resin for Low Dielectric Loss
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Solution Overview
Problem
Current materials for high-frequency electronic components face challenges with high dielectric loss, heat resistance, and processing difficulties due to high viscosity and insufficient dielectric characteristics, particularly with poly(phenylene ether) resins, which hinder the development of materials with low permittivity and low dielectric loss for high-frequency applications.
Innovation Solution
A thermosetting resin composition is developed using poly(phenylene ether) with unsaturated bond substituent groups and three or more specific cross-linking curing agents, combined with a flame retardant and inorganic fillers treated with silane coupling agents, to enhance heat resistance, low dielectric characteristics, and processability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If poly(phenylene ether) resin is used to achieve low dielectric loss characteristics, then dielectric properties are improved, but melt viscosity increases and handleability deteriorates
Solution Approach 1:
The patent modifies the molecular structure of poly(phenylene ether) by introducing unsaturated bond substituent groups (vinyl or allyl groups) at both ends of the molecular chain. This structural parameter change enables the resin to achieve both low dielectric loss characteristics and reduced melt viscosity, improving handleability while maintaining excellent dielectric properties for high-frequency applications.
2Reliability
If poly(phenylene ether) resin is used to achieve low dielectric loss characteristics, then dielectric properties are improved, but molding processability of prepreg deteriorates
Solution Approach 1:
The patent introduces unsaturated bond substituent groups at the molecular chain ends of poly(phenylene ether), which fundamentally changes the resin's flow and curing characteristics. This enables the prepreg to exhibit both excellent low dielectric loss characteristics and superior molding processability, allowing for effective cross-linking and high-quality laminate formation.
3Temperature
If cross-linking is enhanced to improve heat resistance, then glass transition temperature increases, but dielectric loss may increase
Solution Approach 1:
The patent uses specific cross-linking curing agents that react with the unsaturated bond substituent groups introduced into the poly(phenylene ether) structure. This controlled cross-linking approach achieves effective heat resistance improvement with increased glass transition temperature while maintaining low dielectric loss characteristics, avoiding the trade-off between heat resistance and dielectric performance.
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 composition achieves improved glass transition temperature, low thermal expansion, high heat resistance, and excellent dielectric properties, making it suitable for high-frequency applications in electronic devices such as mobile communication devices and base stations.
Implementation Method 1
an inorganic filler surface-treated with a vinyl group-containing silane coupling agent
Implementation Method 2
a poly(phenylene ether) having two or more unsaturated substituent groups selected from the group consisting of a vinyl group and an allyl group at both ends of the molecular chain
Data Source
AI summary
The present invention related to a thermosetting resin composition for high frequency, the composition containing (a) a polyphenylene ether having two or more unsaturated substituent groups selected from the group consisting of the vinyl group and the allyl group at both ends of the molecular chain thereof, or an oligomer of said polyphenylene ether; (b) three or more different types of cross-linking curing agents; and (c) a flame retardant. The present invention may provide a printed circuit board for high frequency which simultaneously exhibits low dielectric loss characteristic and good moisture-absorption heat resistance, low thermal expansion characteristics, excellent thermal stability, excellent processability, and the like.