Resin Composition for Printed Circuit Boards
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Solution Overview
Problem
Current resin compositions for multilayer printed circuit boards face challenges in achieving desired surface roughness and adhesion to copper foil, particularly when using cyanate ester-based resins, which affect chemical resistance and wiring quality.
Innovation Solution
A resin composition comprising an epoxy-based resin, a curing agent with a specific weight ratio of cyanate ester-based resin to phenolic resin, silica particles, and a curing accelerator that includes both an imidazole-based compound and a metal-based compound, enhancing curing properties and surface roughness through desmear treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cyanate ester-based resin is used as a curing agent, then chemical resistance is improved, but surface roughness and adhesion to copper foil deteriorate
Solution Approach 1:
The patent uses a composite curing agent system combining cyanate ester-based resin (40-70 wt%) for chemical resistance with phenolic resin (30-60 wt%) for surface quality and adhesion. This composite approach allows the insulation film to simultaneously achieve excellent chemical resistance and appropriate surface roughness for copper foil adhesion.
Solution Approach 2:
The patent optimizes the weight ratio parameters of the curing agents to achieve the desired balance. By adjusting the cyanate ester-based resin content to 40-70 wt% and phenolic resin to 30-60 wt%, the formulation achieves both chemical resistance and surface roughness requirements. Additionally, the curing accelerator content is controlled at 0.1-5 wt% to optimize the curing properties.
2Reliability
If a cyanate ester-based resin is used as a curing agent, then chemical resistance is improved, but adhesion to copper foil deteriorates
Solution Approach 1:
The patent employs a composite curing agent system where cyanate ester-based resin (40-70 wt%) provides chemical resistance while phenolic resin (30-60 wt%) contributes to adhesion properties. This combination ensures the insulation film maintains both chemical resistance and strong adhesion to copper foil.
Solution Approach 2:
The patent controls the weight ratio of cyanate ester-based resin to phenolic resin within specific ranges (cyanate ester 40-70 wt%, phenolic 30-60 wt%) to optimize both chemical resistance and adhesion. The curing accelerator content is also optimized at 0.1-5 wt% to enhance curing properties and adhesion strength.
3Manufacturing precision
If the resin composition is optimized for surface roughness, then adhesion to copper foil is improved, but curing properties may deteriorate
Solution Approach 1:
The patent optimizes multiple parameters simultaneously: cyanate ester-based resin content (40-70 wt%) for chemical resistance, phenolic resin content (30-60 wt%) for surface quality, and curing accelerator content (0.1-5 wt%) for curing properties. This multi-parameter optimization ensures balanced performance across all requirements.
Solution Approach 2:
The patent introduces a curing accelerator (imidazole-based compound and/or metal-based compound) at 0.1-5 wt% as an intermediary substance that enhances the curing reaction. This accelerator ensures that even with the optimized resin composition for surface roughness, the curing properties remain excellent.
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 excellent adhesion to copper foil, chemical resistance, and improved wiring quality in multilayer printed circuit boards, with specific surface roughness and curing properties that were previously difficult to attain.
Implementation Method 1
a curing agent comprising a cyanate ester-based resin and a phenolic resin
Implementation Method 2
excellent curing properties by applying a cyanate ester-based resin and a phenolic resin, which have a specific weight ratio, as a curing agent
Implementation Method 3
the curing accelerator comprises both an imidazole-based compound and a metal-based compound
Implementation Method 4
an insulation film prepared using the resin composition according to an exemplary embodiment of the present application can have an appropriate surface roughness through desmear treatment
Implementation Method 5
through desmear treatment, and thus has excellent adhesion to copper foil
Implementation Method 6
inorganic particles comprising silica particles
Implementation Method 7
has excellent adhesion to copper foil
Data Source
AI summary
The resin composition according to an exemplary embodiment of the present application comprises: an epoxy-based resin; a curing agent comprising a cyanate ester-based resin and a phenolic resin; inorganic particles comprising silica particles; and a curing accelerator, the weight ratio of the cyanate ester-based resin:the phenolic resin is 95:5 to 40:60, and the curing accelerator comprises both an imidazole-based compound and a metal-based compound.