Ceramic Electronic Component Electrode Configuration for Acoustic Noise Reduction
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Solution Overview
Problem
Ceramic electronic components in electronic devices generate acoustic noise due to electric-field-induced distortion, causing discomfort and necessitating further noise reduction techniques.
Innovation Solution
A ceramic electronic component design featuring a ceramic body with specific electrode configurations and orientations, including inner and outer electrodes, which reduces the transmission of distortion-induced vibrations to the substrate, thereby minimizing acoustic noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a ceramic electronic component uses a conventional electrode configuration, then the component structure is simple, but acoustic noise is generated due to vibration transmission to the substrate
Solution Approach 1:
The outer electrode is divided into multiple electrode portions (first electrode portion and second electrode portion) arranged at different positions on the side surface. This segmentation allows different regions of the electrode to serve different functions: some regions suppress vibration at nodal points while others provide electrical connection, thereby reducing acoustic noise without excessive complexity
Solution Approach 2:
The electrode portions are strategically positioned at specific locations on the side surface, particularly near nodal points of vibration modes. This local optimization ensures that electrode material is placed where it most effectively suppresses vibration transmission to the substrate, rather than uniformly distributing the electrode across the entire component
2Object-affected harmful factors
If electrode portions are positioned to maximize vibration suppression, then acoustic noise is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The electrode portions are designed to extend to the side surface of the ceramic body, creating natural mechanical contact points that serve as vibration suppression locations. This preliminary positioning during the manufacturing process itself, rather than requiring post-manufacturing adjustment, reduces the need for high-precision positioning while achieving effective vibration suppression
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 reduces or prevents acoustic noise by optimizing the placement and dimensions of electrodes, reducing the transmission of vibrations and stress to the substrate, resulting in a significant decrease in noise levels.
Implementation Method 1
the ceramic electronic component deforms when a voltage is applied due to distortion caused by a piezoelectric effect or an electrostrictive effect of the ceramic layer, namely, electric-field-induced distortion
Implementation Method 2
the ceramic electronic component deforms when a voltage is applied due to distortion caused by a piezoelectric effect or an electrostrictive effect of the ceramic layer
Implementation Method 3
a substrate on which this ceramic electronic component is mounted vibrates and generates sound due to the deformation of the ceramic electronic component
Data Source
AI summary
In an electronic component, a first outer electrode is provided on a first side surface and a second outer electrode is provided on a second side surface. Each of the first and second outer electrodes includes first and second electrode portions that are arranged at positions other than end portions and a center of the first or second side surface in a first direction.