Laminated Capacitor ESL Reduction via Integrated Electrode Merging
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Solution Overview
Problem
Existing laminated capacitors face challenges in reducing equivalent series inductance (ESL) and increasing capacity while maintaining a thin profile, due to complex structures and separate assembly processes that complicate manufacturing and increase ceramic layer thickness.
Innovation Solution
A laminated capacitor design featuring a dielectric body with alternating internal electrodes connected via outer and inner through-hole conductors, allowing high-frequency currents to cancel out magnetic fields and enabling a simpler, continuous manufacturing process that reduces ceramic layer thickness and increases capacitance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the first and second capacitors are prepared separately and assembled later, then the ESL can be reduced, but the manufacturing complexity increases and the ceramic layer thickness doubles at the joint
Solution Approach 1:
The patent merges the first and second capacitors into a single integrated structure where both capacitors share common terminal electrodes and are formed in one continuous manufacturing process. This eliminates the need for separate preparation and assembly of the capacitors, reducing manufacturing complexity while maintaining the ESL reduction benefit through the integrated design.
Solution Approach 2:
The patent segments the internal electrodes into first and second internal electrodes that are alternately arranged and connected to different terminal electrodes, allowing the capacitor to function as two separate capacitors (first and second capacitors) within a single integrated structure. This segmentation enables ESL reduction while avoiding the complexity of separate assembly.
2Reliability
If the first and second capacitors are prepared separately and assembled later, then the ESL can be reduced, but the ceramic layer thickness doubles at the joint
Solution Approach 1:
The patent merges the ceramic layers of the first and second capacitors into a single continuous ceramic body formed in one manufacturing process. This eliminates the joint between separately assembled capacitors, preventing the doubling of ceramic layer thickness and enabling a thinner overall profile while maintaining ESL reduction through the integrated electrode structure.
3Reliability
If many through conductors are used to connect opposite electrodes, then the ESL is reduced, but the structure becomes complicated and manufacturing becomes difficult
Solution Approach 1:
The patent uses terminal electrodes that serve multiple functions: they act as both external connection terminals and as common electrodes for both the first and second capacitors. This multi-functionality reduces the need for numerous separate through conductors, simplifying the structure and manufacturing while maintaining effective ESL reduction through the integrated electrode connections.
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
The design effectively reduces ESL, increases capacitance, and simplifies manufacturing, reducing the risk of insulation failure and short-circuits while maintaining a compact form factor.
Implementation Method 1
the first and second internal electrodes connected via outer and inner through-hole conductors, allowing high-frequency currents to cancel out magnetic fields
Data Source
AI summary
A laminated capacitor includes: a dielectric body; first terminal electrodes arranged at intervals on one surface of the dielectric body; second terminal electrodes arranged at intervals on the surface of the dielectric body; first internal electrodes arranged in layers within the dielectric body; second internal electrodes arranged in layers within the dielectric body to alternate with the first internal electrodes; first outer through-hole conductors each connecting each first terminal electrode to one first internal electrode which is located closest to the surface of the dielectric body among the first internal electrodes; second outer through-hole conductors each connecting each second terminal electrode to one second internal electrode which is located closest to the surface of the dielectric body among the second internal electrodes; a first inner through-hole conductor connecting the first internal electrodes to one another; and a second inner through-hole conductor connecting the second internal electrodes to one another.