Multilayer Capacitor Terminal Joint Surface Flexing
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Solution Overview
Problem
Multilayer capacitors experience chattering noises due to electrostrictive vibrations when an AC voltage is applied, as existing structures fail to effectively absorb these vibrations, leading to noise propagation to the substrate.
Innovation Solution
A multilayer capacitor design featuring metal terminals with a substrate connecting surface, a terminal connecting surface, and a joint surface, where the joint surface flexes to mitigate electrostrictive vibrations, with at least one of the terminal or joint surfaces having a rising part not exceeding the capacitor element body height, allowing for efficient vibration absorption and easy mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the joint surface is made longer to improve vibration absorption, then the noise reduction efficiency is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent introduces a rising part that extends in the vertical dimension (height direction) rather than only extending the joint surface horizontally. This dimensional change allows the joint surface to be sufficiently long for vibration absorption while keeping the overall structure compact and manageable, resolving the contradiction between vibration absorption efficiency and structural complexity
Solution Approach 2:
The metal terminal is divided into distinct functional segments: the substrate connecting surface, the terminal connecting surface, and the joint surface with rising part. This segmentation allows each part to be optimized independently - the joint surface can be made sufficiently long for vibration absorption while the rising part provides structural support, reducing overall manufacturing complexity
2Ease of manufacture
If the metal terminal structure is simplified for easier manufacture, then the ease of manufacture is improved, but the ability to absorb electrostrictive vibrations is reduced
Solution Approach 1:
The joint surface with rising part is designed to be flexible, allowing it to bend and flex during operation. This flexibility enables the joint surface to absorb electrostrictive vibrations effectively. The rising part provides structural support while the joint surface maintains flexibility for vibration absorption, achieving both ease of manufacture and vibration mitigation
Solution Approach 2:
The metal terminal structure incorporates dynamic characteristics through the flexible joint surface that can bend and flex in response to electrostrictive vibrations. This dynamic design allows the structure to adapt to operational conditions, absorbing vibrations effectively while maintaining a relatively simple overall structure that is easy to manufacture
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 design effectively prevents chattering noises by securing sufficient length for the joint surface to absorb vibrations, improving noise reduction efficiency while simplifying the manufacturing process and ensuring easy mounting.
Implementation Method 1
When a voltage is applied to the multilayer capacitor, a mechanical strain having a magnitude corresponding to the applied voltage is generated in the capacitor element body because of the electrostrictive effect. When an AC voltage is applied, the mechanical strain causes vibrations (electrostrictive vibrations) in the multilayer capacitor in particular.
Implementation Method 2
the joint surface joining the substrate connecting surface and terminal connecting surface in the metal terminal can flex, so as to mitigate the electrostrictive vibration, thereby preventing chattering noises from occurring
Data Source
AI summary
A multilayer capacitor is provided which can efficiently prevent chattering noises from occurring in a simple structure.In the multilayer capacitor, a metal terminal is disposed about a capacitor element body. Even when an electrostrictive vibration is generated in the multilayer capacitor upon voltage application, a joint surface joining a substrate connecting surface and a terminal connecting surface together in the metal terminal can flex, so as to mitigate the electrostrictive vibration, thereby preventing chattering noises from occurring. In the multilayer capacitor, the terminal connecting surface and joint surface form a rising part having a height which is about half that of the capacitor element body. Therefore, the joint surface joins together the terminal connecting surface and substrate connecting surface that are positioned on different side faces of the capacitor element body, whereby a sufficient length can be secured in the joint surface, thus improving the efficiency of mitigating electrostrictive vibrations. Further, a simple procedure of just mounting the bottom face of the capacitor element body onto the front side of the capacitor element body supporting surface can easily attach the metal terminal to the capacitor element body.