Multilayer Capacitor Stacked Electrodes Miniaturization
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Solution Overview
Problem
The challenge lies in mounting micro-sized multilayer ceramic capacitors effectively due to a lack of suitable technologies for miniaturization, which hinders their application in miniaturized electronic products requiring high capacitance and small size.
Innovation Solution
The design incorporates multiple internal and external electrode layers with dielectric layers alternately stacked, along with connection electrodes, allowing for flexible mounting configurations and varying capacitance by controlling electrode positions and overlaps, mimicking the effect of connecting multiple capacitors in series or parallel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the capacitor size is reduced for miniaturization, then the mounting area is reduced, but the capacitance value decreases and mounting becomes difficult
Solution Approach 1:
The capacitor is divided into multiple internal electrode layers (first, second, third internal electrode layers) with alternating polarities. Each layer contributes to the total capacitance, allowing the capacitor to maintain high capacitance in a reduced volume by stacking multiple capacitive elements within the same footprint.
Solution Approach 2:
The patent transitions from planar electrode arrangement to three-dimensional stacking of internal electrode layers. By stacking electrodes in the thickness direction with dielectric layers between them, the capacitor achieves higher capacitance density without increasing the planar mounting area, effectively utilizing the third dimension to overcome the capacitance-volume tradeoff.
2Quantity of substance
If multiple internal electrode layers are stacked to increase capacitance, then the capacitance value increases, but the device complexity increases
Solution Approach 1:
The external electrodes are designed to serve multiple functions: they provide electrical connection to multiple internal electrodes simultaneously and allow flexible mounting configurations. The first external electrode connects to both first and third internal electrodes, while the second external electrode connects to the second internal electrode, enabling the same electrode structure to support various capacitance configurations (series, parallel, or combinations) without requiring additional components.
3Volume of moving object
If the capacitor is miniaturized for electronic product integration, then the mounting area is reduced, but the degree of freedom in mounting is reduced
Solution Approach 1:
The patent provides dynamic adaptability in mounting configurations by allowing the capacitor to be mounted in different orientations and connection modes. The external electrodes can be connected to internal electrodes in various configurations (series, parallel, or mixed), and the capacitor can be mounted with different external electrodes facing up or down, providing mounting flexibility despite the reduced size.
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 approach enables secure, high-capacitance, miniaturized multilayer capacitors with enhanced mounting flexibility and reduced mounting area, allowing for diverse capacitance implementations and improved design freedom.
Implementation Method 1
a multilayer capacitor includes: a first internal electrode layer including first and second internal electrodes spaced apart from each other with an insulating portion interposed therebetween; a second internal electrode layer including a third internal electrode; a body including the first and second internal electrode layers alternately disposed with respective dielectric layers interposed therebetween
Data Source
AI summary
A multilayer capacitor includes: a first internal electrode layer including first and second internal electrodes spaced apart from each other with an insulating portion interposed therebetween; a second internal electrode layer including a third internal electrode; a body including the first and second internal electrode layers alternately disposed with respective dielectric layers interposed therebetween; first and second external electrodes disposed on the body to be electrically connected to the first and second internal electrodes, respectively; a connection electrode penetrating through the body to thereby be electrically connected to the third internal electrode; and a third external electrode disposed on the body to be electrically connected to the connection electrode.