Halogen-Free Resin Composition for High-Frequency PCBs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional halogen-free electronic materials fail to simultaneously exhibit satisfactory high-frequency dielectric properties, heat resistance, and dimensional stability, making it difficult for metal-clad laminates and printed circuit boards to meet high-temperature aging test requirements.
Innovation Solution
A halogen-free low dielectric resin composition comprising a polyphenylene ether resin with an unsaturated functional group, a cross-linking agent with an unsaturated functional group, and a phosphorus-containing compound represented by a specific formula, which improves high-temperature resistance and dielectric properties without degrading physical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional halogen-free flame retardants are used in resin composition, then flame retardancy is improved, but dielectric properties (Dk and Df values) worsen
Solution Approach 1:
The invention changes the chemical structure parameters of the phosphorus-containing compound by introducing specific aromatic hydrocarbon groups and controlling the ratio of phosphorus atoms to aromatic rings. This structural optimization allows the flame retardant to maintain lower polarity and better molecular packing, thereby improving dielectric properties while preserving flame retardancy
Solution Approach 2:
The invention creates a composite resin system combining polyphenylene ether base resin with specifically designed phosphorus-containing compounds. This composite approach allows synergistic effects where the phosphorus compound provides flame retardancy through char formation while the aromatic hydrocarbon structure maintains low dielectric constant and dissipation factor
2Reliability
If resin composition is adjusted to maintain good dielectric properties, then Dk and Df values are improved, but physical properties (peeling strength, dimensional stability, heat resistance) worsen
Solution Approach 1:
The invention optimizes the molecular weight, aromatic ring content, and phosphorus atom ratio in the phosphorus-containing compound to achieve a balance where dielectric properties are maintained while physical strength is preserved through appropriate molecular weight and crosslinking density
Solution Approach 2:
The invention introduces local aromatic hydrocarbon groups in the phosphorus-containing compound structure that provide both low dielectric constant (through reduced polarity) and enhanced physical properties (through rigid structural support and improved intermolecular interactions)
3Object-affected harmful factors
If conventional halogen-free electronic materials are used, then flame retardancy is achieved, but high-temperature resistance and dimensional stability worsen
Solution Approach 1:
The invention changes the thermal stability parameters by incorporating aromatic hydrocarbon groups with high thermal resistance into the phosphorus-containing compound structure. The specific ratio of phosphorus atoms to aromatic rings (0.05-0.50) ensures sufficient crosslinking density for high-temperature stability while maintaining flame retardancy
Solution Approach 2:
The invention creates a composite system where the phosphorus-containing compound with aromatic hydrocarbon groups forms a thermally stable network structure that resists dimensional changes at high temperatures while providing flame retardancy through phosphorus-based char formation mechanisms
Data Source
AI summary
A halogen-free low dielectric resin composition is provided. The halogen-free low dielectric resin composition includes:(A) a polyphenylene ether which has an unsaturated functional group;(B) a cross-linking agent which has an unsaturated functional group; and(C) a phosphorus-containing compound represented by the following formula (I),