Electronic Component Insulating Layer Prevents Electrode Migration
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Solution Overview
Problem
In electronic components with an intermediate portion, diffusion of components can lead to a coarse structure, causing migration issues between electrode portions, which can result in performance deterioration due to moisture infiltration and potential differences.
Innovation Solution
An insulating layer is formed on the side surface to contact exposed regions between electrode portions, preventing migration and moisture infiltration, even when the intermediate portion has lower insulation resistance or potential differences between electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If an intermediate portion is used between function portions with different materials, then internal stress is reduced, but component diffusion occurs leading to coarse structure and migration
Solution Approach 1:
An insulating layer is introduced as an intermediary substance between the electrode portions and the intermediate portion. This insulating layer prevents direct contact and diffusion between the electrode materials and the intermediate portion, thereby stopping migration while allowing the intermediate portion to continue reducing internal stress.
Solution Approach 2:
A thin insulating film or coating is applied to the surfaces of electrode portions that contact the intermediate portion. This thin film acts as a barrier to diffusion and migration, maintaining the stress-relief function of the intermediate portion while preventing structural degradation.
2Ease of manufacture
If the intermediate portion structure becomes coarse due to diffusion, then manufacturing is simplified, but migration occurs between electrode portions
Solution Approach 1:
The insulating layer serves as a mediator that allows the firing process to proceed without causing harmful diffusion. The layer withstands the firing conditions while preventing material exchange, thus maintaining manufacturing simplicity while ensuring reliability.
Solution Approach 2:
The electronic component becomes a composite structure with distinct functional layers: the intermediate portion for stress management and the insulating layer for migration prevention. This composite approach allows each layer to optimize its specific function without compromising the other.
3Ease of operation
If electrode portions are formed across the intermediate portion surface, then electrical connection is achieved, but exposed regions allow moisture infiltration
Solution Approach 1:
The insulating layer forms a protective film over exposed regions of the intermediate portion and electrode portions. This film seals gaps and prevents moisture ingress while maintaining electrical connectivity through the electrode structures.
Solution Approach 2:
The insulating layer converts the potentially harmful effect of exposed surfaces (moisture infiltration paths) into a beneficial sealed structure. The same regions that needed to be exposed for electrical connection are now protected by the insulating coating against environmental damage.
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 insulating layer effectively controls migration and moisture ingress, ensuring reliable performance of the electronic component by covering exposed conductor ends and maintaining insulation across the component's surface.
Implementation Method 1
the first component included in the intermediate portion is diffused to the first function portion and the second component included in the intermediate portion is diffused to the second function portion in the firing process
Implementation Method 2
the end of the internal conductor is covered with the insulating layer. Therefore, the insulating layer controls infiltration of moisture into the element body
Data Source
AI summary
An element body includes a first function portion including a first material, a second function portion including a second material different from the first material, and an intermediate portion placed between the first function portion and the second function portion. The intermediate portion includes a first component included in the first material, and a second component included in the second material. A side surface of the element body includes surfaces of the first function portion, the second function portion, and the intermediate portion. Each of terminal electrodes includes electrode portion formed on the side surface across the surfaces of the first function portion, the second function portion, and the intermediate portion. An insulating layer is formed on the side surface in such a manner as to be in contact with at least a region exposed from the electrode portions between the electrode portions in the surface of the intermediate portion.