Siloxane Resin Binder for Electronic Component Electrode Bonding
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Solution Overview
Problem
The use of magnetic metal powder-containing resin with epoxy resin in electronic components results in insufficient bond strength between high-oxygen-affinity metal outer electrodes and mounting substrates.
Innovation Solution
The combination of a cyclic siloxane resin or branched siloxane resin with an outer electrode containing an early transition metal like Cr, Ti, or V enhances the bond strength between the outer electrode and the mounting substrate by using a binder with specific reactive groups and a suitable ratio of binders, along with a second binder for compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If epoxy resin is used as a binder in magnetic metal powder-containing resin, then the resin provides good magnetic characteristics and structural stability, but the bond strength between the outer electrode containing high-oxygen-affinity metal and the mounting substrate is insufficient
Solution Approach 1:
The patent changes the chemical composition parameters of the binder by replacing epoxy resin with cyclic siloxane resin or branched siloxane resin. This parameter change fundamentally alters the chemical properties of the binder, enabling it to form strong chemical bonds with high-oxygen-affinity metals like Cr, Ti, and V through oxygen-containing functional groups, thereby resolving the bond strength issue while maintaining structural stability
Solution Approach 2:
The patent creates a composite binder system by combining cyclic siloxane resin or branched siloxane resin with magnetic metal powder. This composite material integrates the bonding capabilities of siloxane resin with the magnetic properties of metal powder, achieving both strong adhesion to high-oxygen-affinity metals and good magnetic characteristics simultaneously
2Strength
If a binder with high reactivity to high-oxygen-affinity metal is used, then the bond strength increases, but the compatibility and processability of the resin system may be compromised
Solution Approach 1:
The patent adjusts the chemical structure parameters of the siloxane resin by introducing specific reactive groups (hydroxyl, carboxyl, epoxy groups) at controlled concentrations. This allows optimization of reactivity toward high-oxygen-affinity metals while maintaining adequate processability and compatibility with other components in the resin system
Solution Approach 2:
The patent applies the principle of local quality by concentrating reactive groups at specific locations within the binder molecule - the oxygen-containing functional groups are positioned to specifically interact with high-oxygen-affinity metal surfaces, while the rest of the siloxane backbone maintains general processability and structural integrity
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
This configuration significantly increases the bond strength between the outer electrode and the mounting substrate, improving the reliability and insulation resistance of coil components while maintaining good magnetic characteristics.
Implementation Method 1
a binder containing a cyclic siloxane resin or a branched siloxane resin enables the bond strength between an outer electrode and a mounting substrate to be increased
Implementation Method 2
the outer electrode being arranged on at least part of a surface of the formed article and containing an early transition metal and/or an alloy of the early transition metal
Data Source
AI summary
An electronic component according to an embodiment of the present disclosure includes a formed article containing a cyclic siloxane resin or a branched siloxane resin serving as a first binder, and an outer electrode on at least part of a surface of the formed article, the outer electrode containing an early transition metal and/or an alloy thereof.