Azole Silane Compound for Copper-Resin Adhesion
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Solution Overview
Problem
There is a challenge in enhancing the bonding property between materials of different qualities, such as metal, inorganic materials, and resin materials, particularly in multilayer printed wiring boards, where the adhesion between copper circuits and insulating resin layers is critical for electronic devices.
Innovation Solution
A novel azole silane compound is synthesized by reacting an azole compound with a halogenated alkylsilane or isocyanatoalkylsilane, incorporating a thioether bond or disulfide bond, which is used as a component in a silane coupling agent to form a surface treatment solution for improving the bonding between these materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional silane coupling agents are used to improve bonding between copper and insulating resin, then adhesion property is enhanced, but corrosion resistance is insufficient
Solution Approach 1:
The invention uses a composite coupling agent system combining silane coupling agents with azole compounds. The silane component (e.g., γ-methacryloxypropyltrimethoxysilane) provides adhesion to the insulating resin, while the azole component (e.g., benzimidazole, triazole, or tetrazole) provides corrosion resistance to the copper surface. This composite approach allows both functions to be achieved simultaneously without compromising either adhesion or corrosion protection.
2Strength
If surface roughening treatment is performed to improve adhesion, then bonding property is enhanced, but manufacturing complexity increases
Solution Approach 1:
The invention introduces a chemical intermediary (silane coupling agent with azole compound) that mediates the bonding between copper and insulating resin. Instead of physically roughening the copper surface, the chemical agent forms a bridging layer that enhances adhesion through chemical bonding, thereby achieving improved bonding property without adding manufacturing complexity or requiring additional surface treatment steps.
3Reliability
If multiple surface treatment steps are used to achieve both adhesion and corrosion resistance, then reliability is improved, but productivity decreases
Solution Approach 1:
The invention merges the adhesion-promoting function and corrosion-resistant function into a single integrated surface treatment step. The coupling agent composition containing both silane and azole components is applied in one process, eliminating the need for separate treatments. This combination approach maintains high reliability (both adhesion and corrosion resistance) while improving productivity by reducing the number of manufacturing steps.
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 azole silane compound enhances the bonding property between metal and inorganic materials or resin materials, preventing corrosion and improving the adhesion of epoxy or urethane resins, thereby stabilizing the electronic devices.
Implementation Method 1
a silane coupling agent having an azole ring... enhances a bonding property between two materials different in a quality of material such as a metal, an inorganic material and a resin material
Implementation Method 2
silane coupling agents having an alkoxy group, such as silanol and trisilanol is preferred as a component of the surface treatment agent in view of an excellent adhesion property
Implementation Method 3
the azole silane compound enhances the bonding property between metal and inorganic materials or resin materials, preventing corrosion
Data Source
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AI summary
Objects are to provide a novel azole silane compound, a synthesis method thereof, and a silane coupling agent containing the azole silane compound as a component, and to provide a surface treatment solution using the azole silane compound, a surface treatment method, and a bonding method of two materials different in the quality of material. The azole silane compound of the present invention is a compound represented by the specific chemical formula (I-1) or (II-1).