Graphene Platelet Conductive Resin for Low ESR Multilayer Ceramic Capacitors
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Solution Overview
Problem
Multilayer ceramic capacitors face challenges in achieving low equivalent series resistance due to the conductive resin layers used in external electrodes, which can increase resistivity and inhibit device performance.
Innovation Solution
Incorporating a conductive resin layer with a graphene platelet and a base resin in the external electrode paste, where the graphene platelet improves conductivity and reduces equivalent series resistance by 30% compared to prior art, while maintaining adhesive strength and shock absorption properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conductive resin layer is used in the external electrode, then adhesive strength and shock absorption are improved, but equivalent series resistance increases
Solution Approach 1:
The conductive resin layer is formulated as a composite material containing conductive metal particles (silver, copper, or aluminum), base resin, and graphene platelets. This composite structure combines the adhesive properties of the resin with the high conductivity of metal particles and graphene, achieving both strong adhesion and low equivalent series resistance simultaneously
Solution Approach 2:
The invention optimizes the composition parameters of the conductive resin layer by controlling the weight ratios of conductive metal particles (60-90 wt%), base resin (5-30 wt%), and graphene platelets (0.1-5 wt%). By adjusting these parameters, the paste achieves the desired balance between adhesive strength and electrical conductivity
2Ease of manufacture
If conventional conductive metal paste is used, then manufacturing simplicity is maintained, but equivalent series resistance is high
Solution Approach 1:
Graphene platelets serve as an intermediary substance that enhances electrical conductivity within the conductive resin layer. The graphene platelets create additional conductive pathways between metal particles, significantly reducing equivalent series resistance while maintaining the simplicity of paste application processes
Solution Approach 2:
The conductive paste is formulated as a composite containing conductive metal particles, base resin, and graphene platelets. This composite approach maintains the ease of manufacture associated with conventional paste application while dramatically improving electrical performance through the synergistic effects of the composite components
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 use of graphene platelets in the conductive resin layers significantly enhances conductivity and reduces equivalent series resistance, improving the performance of multilayer ceramic capacitors by maintaining low resistivity and reliability while avoiding plating defects and adhesive strength issues.
Implementation Method 1
a conductive resin layer disposed on the electrode layer and including a conductive metal, a graphene platelet, and a base resin
Implementation Method 2
When a Raman analysis of the conductive resin layer is performed, two peaks are detected
Data Source
AI summary
A multilayer ceramic electronic component includes a ceramic body including a dielectric and an internal electrode, an electrode layer electrically connected to the internal electrode, and a conductive resin layer disposed on the electrode layer and including a conductive metal, a graphene platelet, and a base resin.