Resin Composition for Low-Loss, Chemical-Resistant PCB Laminates
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Styrene-based elastomers in printed wiring boards have poor miscibility with resins, leading to peeling during chemical treatments and inadequate chemical resistance, which affects the quality and productivity of laminates.
Innovation Solution
A resin composition comprising a styrene-based elastomer, a styrene oligomer, a maleimide compound, and a cyanate ester compound, specifically selected block copolymers and oligomers, to enhance miscibility and improve chemical resistance and dielectric properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a styrene-based elastomer is used as an insulating layer to achieve low dielectric constant and low dielectric loss tangent, then electrical properties are improved, but miscibility with resins deteriorates causing peeling during chemical treatment
Solution Approach 1:
The patent uses a composite resin composition combining styrene-based elastomer with cyanate ester resin and maleimide compound. This composite structure allows the styrene-based elastomer to maintain its excellent electrical properties (low dielectric constant and low dielectric loss tangent) while the cyanate ester and maleimide components provide chemical resistance and stability during processing, preventing peeling and improving overall compatibility.
2Reliability
If styrene-based elastomer is used to improve transmission speed and reduce transmission loss, then electrical performance is improved, but chemical resistance deteriorates leading to dissolution during desmearing
Solution Approach 1:
The patent creates a composite system where styrene-based elastomer provides excellent transmission performance (low dielectric constant and low dielectric loss tangent), while the cyanate ester compound and maleimide compound components are specifically selected to provide superior chemical resistance. The maleimide compound, in particular, forms a chemically resistant crosslinked structure that protects against dissolution during desmearing and other chemical treatments.
Solution Approach 2:
The patent carefully controls the composition ratios and molecular weights of the components. By optimizing the proportion of styrene-based elastomer, cyanate ester resin, and maleimide compound, and by selecting specific molecular weight ranges, the patent achieves a balance between electrical properties and chemical resistance, preventing dissolution during chemical processing while maintaining low dielectric properties.
3Reliability
If styrene-based elastomer is applied to multilayer printed wiring boards to improve performance, then electrical properties are improved, but adhesion to resin deteriorates causing peeling
Solution Approach 1:
The patent employs a composite resin composition where styrene-based elastomer is combined with cyanate ester resin and maleimide compound. The cyanate ester component provides strong adhesion and chemical resistance, while the maleimide compound forms a chemically resistant crosslinked structure. This composite approach maintains the excellent electrical properties of styrene-based elastomer while ensuring strong adhesion and chemical stability during processing.
Data Source
AI summary
Provided are a resin composition that can form a printed wiring board with a low dielectric constant and dielectric loss tangent and excellent alkali resistance and desmear resistance; and a prepreg, a resin sheet, a metal foil-clad laminate, and a printed wiring board formed using this resin composition. The resin composition contains a styrene-based elastomer (A), a styrene oligomer (B), a maleimide compound (C), and a cyanate ester compound (D).