Resin Composition for High-Density PCB Thermal Stability
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Solution Overview
Problem
Conventional low dielectric resin materials face challenges in achieving high thermal resistance, thermal delamination resistance after moisture absorption, and dimensional stability, while maintaining low dielectric constant and adhesion strength, which are crucial for high-density electronic devices with increased heat generation and interconnectivity demands.
Innovation Solution
A resin composition comprising a vinyl-containing polyphenylene ether resin and a multifunctional vinylsilane, optionally combined with other resins and additives, is developed to enhance properties such as glass transition temperature, thermal expansion ratio, peel strength, and dielectric properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional low dielectric resin materials are used, then dielectric constant is low, but thermal resistance and thermal delamination resistance are insufficient
Solution Approach 1:
The patent uses a composite resin system combining polyphenylene ether (PPE) base resin with cycloaliphatic epoxy resin and aromatic ether resin. This composite approach allows the material to achieve both low dielectric constant and high thermal resistance, while the epoxy component provides excellent adhesion to prevent thermal delamination. The synergistic combination of different resin types resolves the contradiction between maintaining low dielectric properties and achieving high thermal performance.
Solution Approach 2:
The patent modifies the chemical composition parameters of the resin system by specifying precise weight ratio ranges: PPE base resin (60-90 wt%), cycloaliphatic epoxy resin (5-30 wt%), and aromatic ether resin (1-20 wt%). By adjusting these compositional parameters within optimized ranges, the material achieves simultaneous improvement in thermal resistance, thermal delamination resistance, and maintenance of low dielectric constant.
2Productivity
If interconnection density is increased, then integration density improves, but heat generation increases requiring higher thermal resistance
Solution Approach 1:
The composite resin system with PPE base resin combined with cycloaliphatic epoxy and aromatic ether components provides enhanced thermal management capabilities. The specific composition ratios enable the material to dissipate heat more effectively, allowing higher interconnection density without excessive heat accumulation that would compromise device reliability.
3Stability of the object's composition
If dimensional stability is improved by lowering thermal expansion ratio, then alignment precision improves, but adhesion strength may be compromised
Solution Approach 1:
The patent employs a composite resin formulation where cycloaliphatic epoxy resin (5-30 wt%) provides exceptional adhesion strength to metal traces and substrates, while the PPE base resin (60-90 wt%) contributes to low thermal expansion and high dimensional stability. The aromatic ether resin (1-20 wt%) further enhances both adhesion and dimensional stability. This tri-component composite system successfully achieves both low thermal expansion ratio and high adhesion strength simultaneously.
Solution Approach 2:
The patent optimizes the weight ratio parameters of the resin components to achieve the desired balance between dimensional stability and adhesion strength. By controlling the content of each resin type within specific ranges, the material formulation achieves low thermal expansion coefficient for dimensional stability while maintaining high bond strength through the epoxy and aromatic ether components.
4Temperature
If glass transition temperature is increased for higher thermal resistance, then thermal stability improves, but processing difficulty increases
Solution Approach 1:
The patent achieves high glass transition temperature (Tg) by optimizing the chemical composition parameters: PPE base resin (60-90 wt%), cycloaliphatic epoxy resin (5-30 wt%), and aromatic ether resin (1-20 wt%). The specific compositional ratios enable the cured resin to attain high Tg for thermal stability while the presence of cycloaliphatic epoxy and aromatic ether components maintains appropriate viscosity and processability during manufacturing, resolving the contradiction between high Tg and ease of processing.
Data Source
AI summary
A resin composition includes a vinyl-containing polyphenylene ether resin and a multifunctional vinylsilane. The resin composition may be used to make various articles, such as a prepreg, a resin film, a laminate or a printed circuit board and achieve improvement in at least one of the properties including prepreg or laminate surface appearance, glass transition temperature, ratio of thermal expansion, peel strength, thermal resistance after moisture absorption, thermal resistance, dielectric constant, dissipation factor and inner resin flow.