Multilayer Capacitor Electrode Recess Structure for Higher Capacitance
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Solution Overview
Problem
Current multilayer capacitors face challenges in achieving efficient performance improvements, such as increased capacitance and miniaturization, while maintaining high reliability and strength characteristics.
Innovation Solution
The design incorporates a stack structure with recess portions on the internal electrodes, which creates a deviation in the distance between electrodes, optimizing the thickness and recession depth of the dielectric layer to enhance capacitance through a curved electric field effect, and includes external electrodes connected to internal electrodes to improve spatial efficiency and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the distance between internal electrodes is reduced to increase capacitance, then capacitance is improved, but the strength and reliability of the capacitor deteriorate
Solution Approach 1:
The recess portion is formed only in specific regions of the internal electrode rather than uniformly across the entire electrode. This localized modification allows the distance between electrodes to be reduced in specific areas (increasing capacitance) while maintaining the original electrode thickness and strength in other areas, thus resolving the contradiction between capacitance improvement and strength maintenance
Solution Approach 2:
Instead of uniformly reducing the electrode distance in one dimension, the recess portion creates a three-dimensional structure with varying distances at different locations. This dimensional variation allows capacitance enhancement through increased electric field intensity in the recessed areas while preserving overall structural integrity through the non-uniform geometry
2Quantity of substance
If the electrode distance is deviated to enhance capacitance performance, then capacitance is improved, but the manufacturing precision requirements worsen
Solution Approach 1:
The recess portion is formed as a pre-designed structural feature during the manufacturing process, establishing the desired electrode distance variation before final assembly. This preliminary structuring allows the capacitance enhancement to be achieved through intentional design rather than requiring high-precision control of uniform electrode spacing, thereby reducing manufacturing precision requirements
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 increases capacitance and reduces the overall size of the multilayer capacitor while maintaining high reliability and strength, by optimizing the dielectric layer thickness and electrode recess patterns, thereby improving performance and miniaturization.
Implementation Method 1
providing a deviation in a distance between the first and second internal electrodes... optimizing the thickness and recession depth of the dielectric layer to enhance capacitance through a curved electric field effect
Data Source
AI summary
A multilayer capacitor includes: a body including a stack structure in which a first internal electrode and a second internal electrode are stacked on each other interposing a dielectric layer therebetween; and first and second external electrodes disposed on the body to be respectively connected to the first internal electrode and the second internal electrode. One of the first internal electrode and the second internal electrode includes a recess portion disposed in one surface thereof, and providing a deviation in a distance between the first and second internal electrodes, TD indicates a thickness of a portion of the dielectric layer, based on a portion positioned on the one surface and not in the recess portion, TR indicates a recession depth of a portion positioned on the one surface and recessed by the recess portion, and (TR/TD) is greater than zero and less than (½).