Multilayer Ceramic Capacitor Step Absorbing Layer
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Solution Overview
Problem
Multilayer ceramic electronic components face defects such as non-uniformity in sheet thickness, electrode spreading, and cracks during the manufacturing process due to the deformation caused by internal electrode material movement during the lamination and compressing of ceramic green sheets.
Innovation Solution
A step absorbing layer is formed in the protective layer of the ceramic body, with a thickness of 0.5 μm to 3 μm and a ratio of 0.5 to 1 to the number of dielectric layers, to absorb steps between internal electrode formation regions, reducing defects like electrode spreading and delamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of stacked ceramic green sheets is increased to achieve higher capacitance, then the capacitance of the multilayer ceramic electronic component is improved, but the internal electrode material moves to empty spaces between printed internal electrodes during lamination and compressing, causing deformation, electrode spreading, and cracks
Solution Approach 1:
A protective layer is formed on the ceramic green sheets before stacking and compressing. This protective layer preliminarily covers the internal electrodes and prevents the internal electrode material from moving to empty spaces during the lamination and compressing processes, thereby preventing deformation, electrode spreading, and cracks while allowing high-capacitance designs with many stacked layers
Solution Approach 2:
The protective layer acts as an intermediary between the internal electrodes and the compression force during manufacturing. It mediates the compression process by providing a protective barrier that prevents direct contact and potential deformation of the internal electrodes, allowing high-density stacking without compromising reliability
Data Source
AI summary
There is provided a multilayer ceramic electronic component, including: a ceramic body having dielectric layers and first and second internal electrodes alternately stacked therein; and first and second external electrodes electrically connected to the first and second internal electrodes and formed at both ends of the ceramic body, wherein the ceramic body includes an effective layer contributing to capacitance formation and a protective layer provided on at least one of upper and lower surfaces of the effective layer, the protective layer including one or more step absorbing layers provided at both ends thereof, so that the multilayer ceramic electronic component can have excellent reliability by reducing defects such as electrode spreading, cracks, delamination and the like.