Conductive Paste for Multilayer Ceramic Capacitor External Electrodes
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Solution Overview
Problem
Multilayer ceramic capacitors face issues with increased equivalent series resistance (ESR) and unstable ripple and heat-generation characteristics when a resin composition containing a conductive material is applied between electrode layers and plating layers, which affects reliability and performance.
Innovation Solution
A conductive paste for external electrodes is developed, comprising first conductive particles with metal, second conductive particles coated with silver (Ag) on ceramic particles, and a thermosetting resin, which are applied to form conductive resin layers to improve ESR characteristics and enhance reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a resin composition containing a conductive material is applied between electrode layers and plating layers of external electrodes, then reliability is improved by absorbing external impacts and preventing plating solution infiltration, but equivalent series resistance (ESR) is increased and ripple and heat-generation characteristics become unstable
Solution Approach 1:
The invention changes the particle size parameters of conductive materials to resolve the contradiction. Specifically, it uses copper particles with a specific size range (0.5-5 μm) and silver particles with a different size range (0.03-0.5 μm), optimizing the distribution of particle sizes to achieve both low ESR and high reliability without the instability of conventional single-size particle compositions
Solution Approach 2:
The invention employs a composite material system consisting of multiple types of conductive particles (copper and silver) with different properties embedded in a resin composition. This composite approach allows the material to simultaneously provide impact absorption (reliability) and maintain low ESR through optimized conductive pathways, while the specific particle size distribution ensures stable ripple and heat-generation characteristics
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 conductive paste effectively reduces ESR by facilitating electron transfer and improving the reliability of multilayer ceramic capacitors, while maintaining stable ripple and heat-generation characteristics.
Implementation Method 1
The conductive paste effectively reduces ESR by facilitating electron transfer
Implementation Method 2
forming first and second conductive resin layers on the first and second electrode layers by applying the conductive paste for an external electrode and curing the applied conductive paste
Data Source
AI summary
A conductive paste for an external electrode, a multilayer ceramic electronic component using the same, and a manufacturing method of a multilayer ceramic electronic component are provided. The conductive paste for an external electrode includes first conductive particles containing a metal, second conductive particles formed of ceramic particles coated with silver (Ag), and a thermosetting resin.