Wiring Board Resin Composition for Metal Foil Adhesion Stability

The patent uses a composite resin system combining polyphenylene ether (PPE) with a reactive compound containing unsaturated double bonds (such as vinyl groups). This composite approach allows the PPE to provide low dielectric properties while the reactive compound forms crosslinked structures that enhance adhesive strength to metal foils, resolving the contradiction between dielectric performance and adhesion.

The patent modifies the chemical structure of polyphenylene ether by introducing reactive functional groups (unsaturated double bonds) into the resin system. This parameter change transforms the otherwise inert PPE into a reactive system that can form strong chemical bonds with metal foils through crosslinking, while maintaining the low dielectric properties of the base PPE structure.

The patent introduces a crosslinking mechanism by incorporating reactive compounds with unsaturated double bonds into the polyphenylene ether system. This changes the chemical parameter of the resin from non-reactive to reactive, enabling the formation of a three-dimensional crosslinked network that resists degradation from heat and moisture, thereby maintaining interlayer adhesive properties under environmental stress.

The patent converts the potential harm of heat and moisture that would normally degrade adhesive properties into a benefit by using these environmental conditions to trigger and complete the crosslinking reaction. The crosslinked structure formed through this process creates a thermosetting network that becomes increasingly resistant to heat and moisture, turning the degrading factors into curing agents that enhance performance.