Multilayer Ceramic Capacitor Geometry for Stable High-Capacitance Mounting
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Solution Overview
Problem
The challenge is to enhance the electrical characteristics of multi-layer ceramic electronic components, such as capacitors, without increasing the mounting area on circuit boards, which is limited in downsized electronic devices.
Innovation Solution
A multi-layer ceramic electronic component design featuring a ceramic body with internal electrodes laminated in a specific direction, paired external electrodes, and flat regions on main surfaces to facilitate stable mounting and increased capacitance, allowing for higher density and improved electrical performance without expanding the board area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the height of the ceramic body is increased to increase the number of laminated internal electrodes and improve electrical characteristics, then the capacitance is improved, but the mounting area on the circuit board increases
Solution Approach 1:
The patent changes the dimensional relationship by making the height dimension (first direction) larger than the width dimension (third direction), which is unconventional. By setting the height to be 1.1 to 1.6 times the width, the design exploits the height dimension to increase capacitance while maintaining a compact footprint on the circuit board, effectively trading vertical space for horizontal space efficiency.
2Quantity of substance
If the height of the ceramic body is increased to increase the number of laminated internal electrodes, then the electrical characteristics are improved, but the stability during mounting and handling deteriorates
Solution Approach 1:
The patent introduces asymmetry in the ceramic body shape by creating flat regions on opposite main surfaces that are offset from each other. The first flat region is positioned at a different location than the second flat region, creating an asymmetric configuration that provides stable suction contact points while maintaining the increased height for higher capacitance.
Solution Approach 2:
The patent applies local quality by creating specific flat regions on the ceramic body surfaces at particular locations. These flat regions are not uniformly distributed but are strategically positioned to provide stable contact points for suction nozzles during mounting, while the rest of the ceramic body maintains its increased height for capacitance enhancement.
3Quantity of substance
If the ceramic body is made taller to increase capacitance, then the electrical characteristics are improved, but the component becomes prone to inclination and mounting failures
Solution Approach 1:
The patent applies local quality by creating specific flat regions on the ceramic body surfaces at particular locations. These flat regions are not uniformly distributed but are strategically positioned to provide stable contact points for suction nozzles during mounting, while the rest of the ceramic body maintains its increased height for capacitance enhancement.
Solution Approach 2:
The patent incorporates preliminary action by pre-forming flat regions on the ceramic body during the manufacturing process, before the mounting stage. This ensures that when the component is picked up by the suction nozzle, the contact points are already prepared and optimized, preventing inclination and mounting failures without requiring additional adjustments during assembly.
Data Source
AI summary
A multi-layer ceramic electronic component includes: a ceramic body including internal electrodes laminated in a first direction, a first main surface including a first flat region facing in the first direction, and a second main surface including a second flat region facing in the first direction; and a pair of external electrodes connected to the internal electrodes and facing each other in a second direction orthogonal to the first direction, a dimension of the ceramic body in the first direction being 1.1 times or more and 1.6 times or less a dimension of the ceramic body in a third direction orthogonal to the first and second directions, the first flat region being formed at a center portion of the first main surface in the second direction, the second flat region being formed at a center portion of the second main surface in the third direction.