Multilayer Ceramic Capacitor Electrode Layout for Higher Capacitance
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Solution Overview
Problem
Conventional multilayer ceramic capacitors face challenges in achieving both reduced size and increased capacitance simultaneously.
Innovation Solution
The design incorporates a multilayer body with internal electrode layers exposed at opposing end surfaces, featuring extension and counter portions with varying coverage regions, connected by external electrodes, to enhance capacitance without increasing size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the size of the multilayer ceramic capacitor is reduced, then the compactness is improved, but the capacitance decreases
Solution Approach 1:
The internal electrode layers are designed with non-uniform coverage in different regions. The first and second high coverage regions have greater coverage than the extension portions, creating local variations in electrode area that increase capacitance without increasing overall capacitor size. This local quality differentiation allows optimized capacitance distribution within the constrained volume.
Solution Approach 2:
The electrode structure utilizes multiple dimensions by creating extension portions that protrude from the main body in the lamination direction. This dimensional approach allows the electrodes to occupy additional space without increasing the footprint area, effectively increasing capacitance within the same volume by utilizing the third dimension (height/lamination direction).
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
Provided is a multilayer ceramic capacitor for which it is possible to increase capacity without increasing the size thereof. In a multilayer ceramic capacitor 1: a first opposing part EA of a first internal electrode layer 31 includes a first high coverage region EA0 that is disposed biased to the outside of a laminate 10 in a lamination direction T with respect to a first extraction part D1, and that is a region having a higher coverage than the coverage of the first extraction part D1; and a second opposing part EB includes a second high coverage region EB0 that is disposed biased to the outside of the laminate 10 in the lamination direction T with respect to a second extraction part D2, and that is a region having a higher coverage than the coverage of the second extraction part D2.