Resin Composition for Printed Wiring Boards
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Solution Overview
Problem
Resin compositions comprising cyanate compounds and epoxy resins fail to adequately improve glass transition temperature, which is essential for advanced printed wiring boards requiring high integration and miniaturization.
Innovation Solution
A resin composition combining a cyanate compound and an epoxy resin with specific structural units, along with optional fillers and other components, to enhance glass transition temperature and thermal properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional cyanate compound and epoxy resin compositions are used, then basic adhesion and electrical properties are achieved, but glass transition temperature remains insufficient for high integration applications
Solution Approach 1:
The patent modifies the chemical structure parameters of the epoxy resin by introducing specific structural units (formulae 1 and 2) with rigid aromatic groups and controlled flexibility. This structural parameter change directly increases the glass transition temperature while maintaining the resin's adhesion and electrical insulation properties, resolving the contradiction between temperature resistance and reliability.
Solution Approach 2:
The patent creates a composite resin system by combining cyanate compound (A) with epoxy resin (B) containing specific structural units. This composite material approach leverages the high adhesion of cyanate compounds with the enhanced thermal properties of the specially structured epoxy resin, achieving both high glass transition temperature and insulation reliability simultaneously.
2Volume of moving object
If laminate thickness is reduced for multilayer printed wiring boards, then miniaturization is achieved, but warpage increases due to insufficient resin heat resistance
Solution Approach 1:
The patent changes the thermal parameters of the resin composition by incorporating epoxy resin with rigid aromatic structural units that have high glass transition temperature. This parameter change enables thin laminates to maintain sufficient heat resistance and dimensional stability, preventing warpage in multilayer printed wiring boards while achieving miniaturization.
3Temperature
If higher glass transition temperature is required for thin laminates, then heat resistance improves, but material selection and formulation complexity increase
Solution Approach 1:
The patent establishes specific parameter ranges for the epoxy resin structural units (formulae 1 and 2) and their ratios, providing a clear formulation guideline. This parameter-based approach simplifies material selection and formulation while ensuring high glass transition temperature, reducing the complexity of developing suitable materials for thin laminates.
Data Source
AI summary
A resin composition comprising a cyanate compound (A); and an epoxy resin (B) having a structural unit represented by the following formula (1) and a structural unit represented by the following formula (2).