Multilayer Ceramic Capacitor Noise Reduction via Insulated Metal Frames
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Solution Overview
Problem
Multilayer ceramic capacitors generate acoustic noise due to piezoelectric vibrations, which can cause user discomfort and deteriorate device quality, and existing noise reduction methods, such as metal frames, compromise mounting efficiency during assembly.
Innovation Solution
A multilayer ceramic electronic component design featuring first and second metal frames connected to external electrodes of the capacitor, spaced apart from the mounting surface, and an insulating layer on the capacitor's opposing surface, forming a flat surface to absorb vibrations and improve mounting accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a metal frame is coupled to a multilayer ceramic capacitor to decrease acoustic noise, then acoustic noise is reduced, but mounting efficiency is deteriorated due to suction errors during assembly
Solution Approach 1:
An insulating layer is introduced as an intermediary between the metal frame and the multilayer ceramic capacitor. This insulating layer prevents direct contact while allowing the metal frame to maintain its noise reduction function, thereby eliminating suction errors during mounting without compromising acoustic noise reduction
Solution Approach 2:
The structure is segmented into distinct functional layers: the metal frame for noise reduction, the insulating layer for mounting accuracy, and the multilayer ceramic capacitor for electrical function. This segmentation allows each component to optimize its specific function without interfering with others
2Object-affected harmful factors
If the metal frame is directly coupled to the multilayer ceramic capacitor, then acoustic noise is reduced, but mounting precision is compromised due to air discharge to nozzle vent
Solution Approach 1:
The insulating layer serves as a mediator that prevents air from being discharged to the nozzle vent during mounting, thereby maintaining suction precision without compromising the noise reduction function of the metal frame
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 acoustic noise and maintains mounting efficiency by absorbing vibrations and mechanical stress, while preventing suction errors during assembly.
Implementation Method 1
since the dielectric layer has piezoelectricity, when a direct current (DC) or alternating current (AC) voltage is applied to the multilayer ceramic capacitor, a piezoelectric phenomenon may occur between the internal electrodes, thereby generating periodic vibrations while expanding and contracting a volume of a ceramic body
Implementation Method 2
first and second metal frames connected to different external electrodes of a multilayer ceramic capacitor, respectively, and disposed to be spaced apart from a mounting surface of the multilayer ceramic capacitor
Data Source
AI summary
A multilayer ceramic electronic component may include first and second metal frames connected to different external electrodes of a multilayer ceramic capacitor, respectively, and disposed to be spaced apart from a mounting surface of the multilayer ceramic capacitor; and an insulating layer disposed on a surface of the multilayer ceramic capacitor opposing the mounting surface thereof.