Multilayer Ceramic Component Electrodes for Moisture-Resistant Bonding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
As multilayer ceramic electronic components become smaller and have higher capacity, their external electrodes become thinner, making them vulnerable to moisture penetration and external physical and chemical impacts, which degrades their mechanical strength and product quality.
Innovation Solution
The multilayer ceramic electronic component includes a ceramic body with dielectric layers and internal electrodes, and external electrodes with a base electrode layer, a conductive glass layer, and a resin electrode layer, which increases the bonding force between the external electrodes and the ceramic body, enhancing mechanical strength and moisture resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If external electrodes are made thinner to achieve miniaturization, then the component size is reduced, but moisture resistance deteriorates
Solution Approach 1:
The external electrode is segmented into multiple layers: a base electrode layer (first layer) in direct contact with the ceramic body, and a resin electrode layer (second layer) disposed on the base electrode layer. This segmentation allows each layer to perform its specific function - the base electrode layer ensures electrical connection and moisture barrier, while the resin electrode layer provides mechanical protection and bonding, thereby maintaining moisture resistance even when the overall electrode thickness is reduced.
Solution Approach 2:
The external electrode uses a composite structure combining different materials in the base electrode layer and resin electrode layer. The base electrode layer typically contains conductive materials and glass components for electrical conductivity and moisture barrier properties, while the resin electrode layer contains resin materials for mechanical strength and protection. This composite material approach enables the thin electrode structure to maintain both electrical functionality and moisture resistance.
2Volume of moving object
If external electrodes are made thinner to achieve miniaturization, then the component size is reduced, but mechanical strength deteriorates
Solution Approach 1:
The external electrode is divided into a base electrode layer and a resin electrode layer, where each layer contributes different mechanical properties. The base electrode layer provides structural foundation and electrical connectivity, while the resin electrode layer adds mechanical strength and protection. This segmentation enables the thin electrode to maintain adequate mechanical strength by distributing functional requirements across multiple layers.
Solution Approach 2:
The composite structure of base electrode layer and resin electrode layer combines materials with complementary mechanical properties. The base electrode layer provides rigidity and structural support, while the resin electrode layer provides toughness and protective coverage. This composite material design allows the thin external electrode to achieve sufficient mechanical strength despite reduced thickness.
3Strength
If a multilayer external electrode structure is applied, then bonding force and mechanical strength are improved, but device complexity increases
Solution Approach 1:
The external electrode is segmented into a base electrode layer and a resin electrode layer with clear functional differentiation. The base electrode layer handles electrical connection and initial bonding to the ceramic body, while the resin electrode layer provides additional bonding force and mechanical protection. This functional segmentation improves bonding strength without requiring complex multi-material integration, as each layer has a dedicated purpose.
Solution Approach 2:
The base electrode layer and resin electrode layer are merged into a single integrated external electrode structure that functions as a unified component. The layers are bonded together through firing or curing processes, creating a combined structure that leverages the advantages of both materials while maintaining a relatively simple overall architecture compared to multi-functional separate 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
This configuration improves the mechanical strength and moisture resistance of the multilayer ceramic electronic component by increasing the bonding force between the external electrodes, while maintaining low equivalent series resistance (ESR) and preventing defects such as peel-off or delamination.
Implementation Method 1
a first glass layer disposed on the first base electrode layer, and a first resin electrode layer disposed on the first glass layer
Implementation Method 2
each of the first and second glass layers includes conductive glass
Implementation Method 3
a first base electrode layer, having a metal, disposed in contact with the ceramic body
Data Source
AI summary
A multilayer ceramic electronic component includes a ceramic body including a dielectric layer and first and second internal electrodes disposed to be alternately stacked with the dielectric layer interposed therebetween, a first external electrode and a second external electrode connected to the first and the second internal electrode respectively. The first external electrode includes a first base electrode layer disposed in contact with the ceramic body, a first glass layer disposed on the first base electrode layer, and a first resin electrode layer disposed on the first glass layer. The second external electrode includes a second base electrode layer disposed in contact with the ceramic body, a second glass layer disposed on the second base electrode layer, and a second resin electrode layer disposed on the second glass layer.