Multilayer Capacitor Asymmetric Electrode Lamination for Acoustic Noise Reduction
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Solution Overview
Problem
Multilayer capacitors in vehicles generate acoustic noise and high-frequency vibrations, which can cause malfunctioning of sensors and are not effectively mitigated by existing technologies.
Innovation Solution
The electronic component comprises at least one first multilayer capacitor and one second multilayer capacitor alternately laminated in perpendicular directions, with conductive adhesive layers and metal frames to reduce acoustic noise and vibrations by altering the deformation patterns of the capacitors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multilayer capacitors are used in vehicles to meet high capacity and mounting density requirements, then mounting density and capacity are improved, but acoustic noise and high-frequency vibrations are generated that can cause sensor malfunction
Solution Approach 1:
The patent applies asymmetry by configuring internal electrodes in different orientations within the same capacitor body. Specifically, first internal electrodes are arranged in a first direction while second internal electrodes are arranged in a second direction perpendicular to the first direction, creating asymmetric electrode patterns that reduce synchronized piezoelectric vibrations and acoustic noise while maintaining high capacity and mounting density
Solution Approach 2:
The patent transitions from single-direction electrode arrangement to multi-directional electrode arrangement by introducing internal electrodes in perpendicular directions (first direction and second direction). This dimensional change in electrode configuration allows the capacitor to reduce vibrations in multiple directions simultaneously, effectively mitigating acoustic noise and high-frequency vibrations that affect sensor operation
2Quantity of substance
If dielectric material is used in multilayer capacitors to achieve high capacity, then capacity is improved, but piezoelectric vibrations occur that transmit to the board and cause acoustic noise
Solution Approach 1:
The patent uses asymmetric electrode configuration where first internal electrodes extend in a first direction and second internal electrodes extend in a second direction perpendicular to the first direction. This asymmetric arrangement ensures that piezoelectric deformations in different directions do not synchronize, thereby reducing acoustic noise while preserving the high capacity provided by the dielectric material
Solution Approach 2:
The patent changes the geometric parameters of internal electrode arrangement by introducing electrodes in multiple directions (first direction and second direction) rather than a single direction. This parameter change in electrode orientation disrupts the synchronized piezoelectric response that causes acoustic noise, while the dielectric material continues to provide high capacity
3Ease of manufacture
If internal electrodes are laminated in a single direction to simplify manufacturing, then manufacturing complexity is reduced, but vibrations are synchronized with applied voltage and transmitted to the board
Solution Approach 1:
The patent implements asymmetric electrode lamination where first internal electrodes are laminated in a first direction and second internal electrodes are laminated in a second direction perpendicular to the first direction. This asymmetric multi-directional lamination prevents synchronized piezoelectric vibrations while remaining manufacturable through standard layering processes
Solution Approach 2:
The patent extends the electrode lamination from a single direction to multiple directions by adding internal electrodes in a second direction perpendicular to the first direction. This multi-dimensional electrode arrangement maintains manufacturing feasibility while effectively reducing vibrations and acoustic noise through disrupted piezoelectric synchronization
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 configuration reduces acoustic noise in the audible frequency range and high-frequency vibrations, minimizing the impact on sensors and improving the reliability of electronic components in vehicles.
Implementation Method 1
since a dielectric material has piezoelectric properties, the material may be synchronized with an applied voltage and may be deformed accordingly
Implementation Method 2
a conductive adhesive layer disposed between the external electrode of the first multilayer capacitor and the external electrode of the second multilayer capacitor
Data Source
AI summary
An electronic component includes at least one first multilayer capacitor and at least one second multilayer capacitor alternatively laminated in a first direction perpendicular to one surface of the first multilayer capacitor, such that an external electrode of the first multilayer capacitor is connected to an external electrode of the second multilayer capacitor. In the first multilayer capacitor, a plurality of internal electrodes are laminated in a first direction, and in the second multilayer capacitor, a plurality of internal electrodes are laminated in a second direction perpendicular to the first direction.