Multilayer Ceramic Capacitor Electrode Segmentation for Low DC Resistance
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Solution Overview
Problem
High-frequency noise removal and low DC resistance are challenging in three-terminal penetration capacitors due to increased current consumption in high-integration LSI circuits, requiring improved capacitor designs to stabilize power supply circuits effectively.
Innovation Solution
A multilayer ceramic capacitor design with external electrodes on both ends and internal electrodes arranged in a specific pattern within the ceramic body, including a center region with increased electrode density and alternating side regions, to reduce DC resistance and enhance high-frequency noise removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the capacitor size is reduced for high integration, then the device compactness is improved, but the DC resistance increases and current handling capability deteriorates
Solution Approach 1:
The internal electrodes are divided into two types: first internal electrodes extending through the entire ceramic body for low DC resistance, and second internal electrodes with lead-out portions for high-frequency noise removal. This segmentation allows each electrode type to specialize in one function, resolving the contradiction between compact size and performance.
Solution Approach 2:
The patent applies different electrode configurations to different regions of the capacitor. The first internal electrodes provide uniform current distribution throughout the body for low DC resistance, while the second internal electrodes with lead-out portions specifically address high-frequency noise at terminal points, achieving both goals in a compact design.
2Reliability
If the DC resistance is reduced to increase current flow, then the power supply stability is improved, but the high-frequency noise removal capability may deteriorate
Solution Approach 1:
The internal electrodes are segmented into two functional types: first internal electrodes that extend through the entire ceramic body to provide low DC resistance and uniform current distribution, and second internal electrodes with lead-out portions that specifically target high-frequency noise removal. This segmentation allows simultaneous optimization of both DC and high-frequency performance.
Solution Approach 2:
The capacitor structure achieves multi-functionality by combining two electrode systems that together provide both low DC resistance for power supply stability and high-frequency noise removal capability, allowing a single component to fulfill multiple functions that would otherwise require separate devices.
3Productivity
If the current consumption is increased for high integration, then the functional capability is improved, but the heat generation increases and reliability deteriorates
Solution Approach 1:
The first internal electrodes are designed to extend through the entire ceramic body, creating uniform current distribution paths that prevent localized overheating. This uniform current distribution across the entire structure allows high current consumption for high integration while managing heat generation through even thermal distribution.
Data Source
AI summary
A multilayer ceramic capacitor and a board having the same are provided. The multilayer ceramic capacitor includes external electrodes disposed on both end surfaces of a ceramic body and a mounting surface to be spaced apart from each other in a width direction, respectively, first internal electrodes connected to the left and right external electrodes, second internal electrodes having lead-out portions to be connected to the external electrodes disposed on the mounting surface. The ceramic body includes a first region positioned in a center portion thereof in the width direction and second regions positioned in both side portions in the width direction, with the first region therebetween, the plurality of first internal electrodes are disposed in the first region, and the first and second internal electrodes are alternately disposed in the second regions.