Multilayer Capacitor Segmented Electrodes Low ESR ESL
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Multilayer capacitors face challenges in achieving low equivalent series resistance (ESR) and low equivalent series inductance (ESL) while maintaining high capacitance, which is essential for efficient power supply decoupling in thin and lightweight electronic devices.
Innovation Solution
The design involves a multilayer capacitor structure with alternately laminated dielectric layers and internal electrodes, where the electrodes are spaced apart and overlap each other to increase the effective capacitance area, thereby reducing ESR and ESL by creating multiple current paths with opposite current directions, which offset magnetic fields and minimize inductance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of internal electrodes is increased to increase capacitance, then the capacitance increases, but the equivalent series resistance and equivalent series inductance also increase
Solution Approach 1:
The internal electrodes are divided into multiple groups (first internal electrodes and second internal electrodes) with different orientations. The first internal electrodes extend in a first direction while the second internal electrodes extend in a second direction perpendicular to the first direction. This segmentation creates multiple current paths that offset each other, reducing the overall equivalent series inductance and equivalent series resistance while maintaining high capacitance.
2Weight of moving object
If the capacitor size is reduced to achieve thinning and lightness, then the device becomes thinner and lighter, but the capacitance and ability to reduce ESR and ESL are compromised
Solution Approach 1:
The patent utilizes three-dimensional space efficiently by arranging internal electrodes in multiple directions (first direction and second direction perpendicular thereto). This multi-dimensional electrode arrangement increases the effective capacitance area within a compact volume, allowing high capacitance to be achieved in a thinner and lighter capacitor structure.
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 significantly decreases ESL and ESR, increasing capacitance by about 68% and effectively applying to devices like smartphones and laptops, while maintaining a compact form factor.
Implementation Method 1
a capacitor body including first and second dielectric layers having first and second surfaces opposing each other, third and fourth surfaces connected to the first and second surfaces and opposing each other, and fifth and sixth surfaces connected to the first and second surfaces as well as to the third and fourth surfaces and opposing each other, the first and second dielectric layers being alternately laminated in a first direction, a plurality of internal electrodes exposed through the third surface, and a plurality of second internal electrodes through the fourth surface
Implementation Method 2
first and second dielectric layers having first and second surfaces opposing each other
Implementation Method 3
The first and second internal electrodes are disposed in one of the second dielectric layers to be spaced apart from each other. The first and second dielectric layers are alternately laminated in the first direction, such that the first internal electrode of the first dielectric layer and the second internal electrode of the second dielectric layer overlap each other in the first direction and the second internal electrode of the first dielectric layer and the first internal electrode of the second dielectric layer overlap each other in the first direction.
Data Source
AI summary
A multilayer capacitor includes a capacitor body including first and second dielectric layers, a plurality of internal electrodes, and a plurality of second internal electrodes, and first and second external electrodes. First and second internal electrodes are disposed in one of the first dielectric layers to be spaced apart from each other. The first and second internal electrodes are disposed in one of the second dielectric layers to be spaced apart from each other. The first and second dielectric layers are alternately laminated in the first direction, such that the first internal electrode of the first dielectric layer and the second internal electrode of the second dielectric layer overlap each other in the first direction and the second internal electrode of the first dielectric layer and the first internal electrode of the second dielectric layer overlap each other in the first direction.