Allylisocyanurate Silane for PPO/TAIC PCBs
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Solution Overview
Problem
The PCB industry faces challenges with conductive anodic filament (CAF) failure due to inadequate silane coupling agents that are not compatible with newer resin systems such as bismaleimide triazine (BT) and polyphenylene oxide/trially-isocyanurate (PPO/TAIC) networks, leading to potential fires and catastrophic failures.
Innovation Solution
A silane coupling agent with an allylisocyanurate ligand is developed, specifically designed to interact with PPO/TAIC resins, incorporating an allyl group that co-reacts with TAIC during curing to form a crosslinked resin tightly bound to glass fibers, enhancing the bond between the varnish and substrate, and synthesized using a transition metal catalyst in the presence of heat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional silane coupling agents (vinylbenzylaminoethylaminopropyltrimethoxysilane) are used with newer resin systems (PPO/TAIC, BT), then the bond between varnish and substrate deteriorates, but changing the silane coupling agent structure increases compatibility with new resins
Solution Approach 1:
The invention changes the chemical structure parameters of the silane coupling agent by replacing the vinylbenzylaminoethylaminopropyl group with an allylisocyanurate group. This structural parameter change enables the coupling agent to be compatible with newer resin systems (PPO/TAIC, BT) while maintaining strong bonding performance, resolving the contradiction between bond strength and resin system compatibility.
Solution Approach 2:
The invention creates a composite coupling system by combining the allylisocyanurate silane structure with newer resin systems. The unique molecular structure of the allylisocyanurate group allows it to interact effectively with both the glass fiber substrate and the newer resin matrices, forming a composite interface that achieves both strong bonding and compatibility.
2Object-affected harmful factors
If the silane coupling agent structure is optimized for new resin systems, then CAF resistance improves, but conventional coupling agents fail to provide adequate CAF protection
Solution Approach 1:
The invention modifies the chemical parameters of the silane coupling agent (introducing the allylisocyanurate group) to create a molecular structure that effectively prevents CAF formation. This parameter change enables the coupling agent to provide adequate CAF protection in newer resin systems where conventional agents fail.
3Strength
If vinylbenzylaminoethylaminopropyltrimethoxysilane is used as the coupling agent, then epoxy-based resin bonding is optimized, but it fails to perform adequately with PPO/TAIC and BT resin systems
Solution Approach 1:
The invention changes the functional group parameters of the silane coupling agent from vinylbenzylaminoethylaminopropyl to allylisocyanurate. This parameter change maintains the ability to bond to glass fiber substrates while adding compatibility with PPO/TAIC and BT resin systems, thereby achieving versatility across multiple resin types.
Solution Approach 2:
The allylisocyanurate silane coupling agent achieves multi-functionality by being able to bond effectively to both the glass fiber substrate and multiple types of resin systems (including PPO/TAIC and BT). This universal compatibility resolves the limitation of conventional agents that are optimized for only one resin type.
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 new silane coupling agent effectively reduces CAF resistance by forming a strong, crosslinked bond with glass fibers, improving the reliability and safety of printed circuit boards by preventing copper corrosion and enhancing thermal performance.
Implementation Method 1
The silane coupling agent typically consists of an organofunctional group to bind to the coating and a hydrolyzable group that binds to the surface of the substrate. In particular, the alkoxy groups on silicon hydrolyze to silanols, either through the addition of water or from residual water on the inorganic surface.
Implementation Method 2
Subsequently, the silanols react with hydroxyl groups on the inorganic surface to form an oxane bond (Si-O-Si) and eliminate water.
Implementation Method 3
In particular, the allyl group(s) of the silane coupling agent can co-react with the allyl group(s) of the TAIC as the varnish cures to form a crosslinked resin tightly bound to the glass fibers of the substrate.
Implementation Method 4
the allyl group(s) of the silane coupling agent can co-react with the allyl group(s) of the TAIC as the varnish cures to form a crosslinked resin
Implementation Method 5
synthesized using a transition metal catalyst in the presence of heat
Implementation Method 6
synthesized using a transition metal catalyst in the presence of heat
Data Source
AI summary
The present invention is directed to silane coupling agents for printed circuit boards, such as high-temperature printed circuit boards (PCBs), a process for synthesizing the silane coupling agent, and (PCBs) with such coupling agents. The silane coupling agent is defined by the following formula: Formula (I) wherein at least one R' is an allyl and the other one is hydrogen, an alkyl, a cycloalkyl, an aryl, a heteroaryl, a non-aromatic heterocyclic ring, or an allyl; and R1 is an alkyl, a cycloalkyl, an aryl, a heteroaryl, a non-aromatic heterocyclic ring, or an allyl.