Multilayer Capacitor Floating-Capacitance Electrode Layout
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Solution Overview
Problem
Existing multilayer ceramic capacitors face challenges in achieving low electric capacitance while maintaining a compact size and minimizing the number of internal electrode stacks, which can lead to increased ESR and decreased Q value.
Innovation Solution
A multilayer capacitor design featuring internal electrodes spaced apart on the same dielectric layer with strategically arranged gaps to create floating capacitance, allowing for adjustable electric capacitance without excessive reduction in the number of electrode stacks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of internal electrode stacks is reduced to achieve low capacitance, then electric capacitance is lowered, but ESR increases and Q value decreases
Solution Approach 1:
The internal electrodes are divided into multiple groups (first internal electrodes and second internal electrodes) with gaps introduced between adjacent electrodes on the same dielectric layer. This segmentation creates floating capacitance regions that allow capacitance reduction while maintaining electrode stack integrity and electrical performance.
Solution Approach 2:
Gaps are introduced not only in the stacking direction but also in the planar direction between adjacent internal electrodes on the same dielectric layer. This multi-dimensional gap arrangement creates floating capacitance that reduces overall capacitance while maintaining stable ESR and Q values without reducing the number of electrode stacks.
2Quantity of substance
If internal electrodes are spaced apart with gaps to reduce capacitance, then electric capacitance is lowered, but device complexity increases
Solution Approach 1:
Gaps are selectively introduced only between adjacent first and second internal electrodes on the same dielectric layer, while maintaining continuous electrode structures in other regions. This localized gap arrangement reduces capacitance through floating capacitance effects without requiring complex overall electrode redesign.
Solution Approach 2:
The capacitor employs asymmetric electrode grouping with distinct first internal electrodes and second internal electrodes, where gaps are strategically positioned between adjacent electrodes of opposite polarity on the same dielectric layer. This asymmetric arrangement creates floating capacitance regions that reduce overall capacitance while maintaining manufacturing feasibility.
3Adaptability or versatility
If gaps are introduced between internal electrodes on the same dielectric layer, then capacitance adjustment is enabled, but manufacturing precision requirements increase
Solution Approach 1:
The capacitance value is adjusted by controlling the parameters of gaps (width, position, and distribution) between adjacent internal electrodes on the same dielectric layer. By varying gap dimensions and patterns, different capacitance values can be achieved while maintaining a fixed number of electrode stacks, enabling precise capacitance customization.
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 effectively lowers electric capacitance while maintaining a stable ESR and Q value, allowing for precise capacitance adjustment and minimizing the need to reduce the number of internal electrode stacks.
Implementation Method 1
a body (110) including a plurality of dielectric layers (111) disposed in a first direction, a plurality of first internal electrodes (121) disposed in the first direction, and a plurality of second internal electrodes (122) disposed in the first direction
Implementation Method 2
A capacitor is a device capable of storing electricity. In a capacitor, when two electrodes oppose each other and a voltage is applied thereto, electricity is accumulated in each electrode
Data Source
AI summary
A multilayer capacitor includes a body including a plurality of dielectric layers disposed in a first direction, a plurality of first internal electrodes disposed in the first direction, and a plurality of second internal electrodes disposed in the first direction. At least a portion of the plurality of first internal electrodes and the plurality of second internal electrodes are spaced apart from each other on a same dielectric layer among the plurality of dielectric layers to have a gap, and among at least three gaps adjacent in the first direction, a gap having a greater distance in the first direction from a reference of the body in the first direction has a greater distance in one direction from a reference of the body in the one direction.