Multilayer Ceramic Capacitor Geometric Optimization via 3D Printing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Multilayer ceramic capacitors face limitations in increasing capacitance and maximum voltage due to delamination under stress and the inability to produce complex shapes, leading to reduced specifications and potential device failure.
Innovation Solution
The use of additive manufacturing, specifically 3D printing, allows for the creation of optimized 3D geometries with rounded edges and wave-like structures in multilayer ceramic capacitors, reducing electric field intensity and enabling closer layer spacing, thereby increasing capacitance and operating voltage while enhancing structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If traditional manufacturing methods are used to produce MLCCs, then simple flat layers can be manufactured, but complex shapes cannot be produced and delamination occurs under stress
Solution Approach 1:
The patent applies curvature by rounding the corners of conductive layers in the MLCC structure. Instead of sharp 90-degree corners, the conductive layers feature rounded edges with a specified radius of curvature. This geometric modification eliminates stress concentration points that cause delamination while maintaining structural integrity, and enables the production of complex three-dimensional shapes that are not achievable with traditional flat-layer manufacturing methods.
2Quantity of substance
If layer spacing is reduced to increase capacitance, then capacitance increases, but delamination risk increases under stress
Solution Approach 1:
By rounding the corners of conductive layers, the patent eliminates sharp geometric discontinuities that act as stress concentration points. The curved transitions distribute mechanical and thermal stresses more uniformly across the layer interfaces, preventing delamination even when layer spacing is reduced to increase capacitance density.
3Ease of manufacture
If sharp corners are used in conductive layers, then manufacturing is simpler, but electric field intensity increases causing lower maximum voltage
Solution Approach 1:
The patent modifies the conductive layer geometry by rounding corners instead of using sharp edges. This curvature eliminates electric field concentration at corner points, distributing the electric field more uniformly across the capacitor structure. As a result, the maximum operating voltage is increased while the manufacturing process remains compatible with standard printing and sintering techniques.
4Volume of moving object
If component size is reduced to increase density, then material usage decreases, but capacitance and voltage specifications decrease
Solution Approach 1:
The rounded corner geometry optimizes the electric field distribution throughout the capacitor volume, eliminating field concentration losses at sharp corners. This allows for more efficient use of the available volume, achieving higher capacitance density and voltage ratings in smaller form factors compared to traditional sharp-cornered MLCC designs.
Data Source
AI summary
Methods and systems to improve a multilayer ceramic capacitor using additive manufacturing are disclosed. Conductive layer ends and dielectric layer edges of a multilayer ceramic capacitor may be modified to comprise a round shape, which may increase voltage limits by reducing electric field intensity that results from sharp corners. Further, the capacitor may comprise wave-like structures to increase surface area of a conductive layer and/or dielectric layer. The round shape of the conductive layer end may in-part reduce the need for a wide protective gap due to its dome-shape permitting the dielectric layer to be wider on top and bottom, and thinner at the center, e.g. concave, which provides strength support to the layers. The 3D Printing process permits the distance between the conductive layer end of the conductive layer to be much closer to the dielectric layer edge of the dielectric layer, such as below the standard 500 microns.