Multilayer Ceramic Component Protruding Diffusion Parts
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Solution Overview
Problem
Multilayer ceramic electronic components face challenges in withstanding external stress and generating uncomfortable acoustic noise due to vibration when mounted on a board, which affects their reliability and user comfort.
Innovation Solution
The component features a ceramic body with internal electrodes and external electrodes connected via diffusion parts that protrude outside, forming hermetically sealed gaps to reduce external stress and vibration transfer, while maintaining electrical connectivity through sintered external electrodes and dielectric layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external electrodes are directly attached to the ceramic body, then electrical connectivity is achieved, but the ceramic body becomes vulnerable to external stress and vibration
Solution Approach 1:
A diffusion part made of conductive paste is introduced as an intermediary between the external electrode and the ceramic body. This diffusion part protrudes from the ceramic body surface and is hermetically sealed, creating a gap that isolates the ceramic body from external stress while maintaining electrical connectivity through the conductive material.
Solution Approach 2:
The electrode connection structure is segmented into three distinct parts: the external electrode, the diffusion part (which protrudes and creates a gap), and the ceramic body. This segmentation allows the diffusion part to absorb external stress independently while the ceramic body remains protected, resolving the contradiction between connectivity and stress resistance.
2Object-affected harmful factors
If the ceramic body is rigidly mounted, then structural stability is achieved, but vibration noise is generated and transferred to the board
Solution Approach 1:
The hermetically sealed gap created by the protruding diffusion part serves as a pre-established cushioning layer between the ceramic body and the mounting board. This gap absorbs vibration energy before it can be transmitted to the board, reducing acoustic noise while maintaining structural stability through the rigid ceramic body and electrode connections.
3Reliability
If diffusion parts protrude outside the ceramic body, then hermetically sealed gaps are formed to protect against stress, but manufacturing precision requirements increase
Solution Approach 1:
The diffusion part is formed by applying conductive paste that self-diffuses and self-seals during the sintering process. The paste naturally protrudes from the ceramic body and creates the hermetic seal through its own material properties and sintering behavior, reducing the need for precise external control of gap dimensions while ensuring reliable stress protection.
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 design enhances the component's resistance to external stress and reduces acoustic noise by creating gaps between the ceramic body and external electrodes, thereby improving reliability and user comfort by minimizing vibration-induced noise.
Implementation Method 1
forming external electrodes by sintering the external electrode paste while forming hermetically sealed gaps between the external electrodes and the ceramic body
Data Source
AI summary
There is provided a multilayer ceramic electronic component including: a ceramic body in which internal electrodes containing a first electrode material and dielectric layers are alternately disposed; external electrodes provided on outer surfaces of the ceramic body and containing a second electrode material; and diffusion parts each disposed to be connected to one end of the internal electrode and the external electrode and containing the first electrode material and the second electrode material mixed with each other, wherein the diffusion part includes an internal diffusion portion disposed within the ceramic body and an external diffusion portion protruding outside of the ceramic body.