Multilayer Ceramic Capacitor Corner Protrusions for Stable Mounting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional multilayer ceramic capacitors tend to have unstable posture during mounting on a board, making soldering operations challenging due to their design.
Innovation Solution
The capacitors feature a rectangular multilayer body with alternately laminated dielectric ceramic and internal electrode layers, and a pair of external electrodes covering the end surfaces, with protrusions at the corners of the main surfaces to maintain stability during mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the multilayer ceramic capacitor has a conventional rectangular parallelepiped structure with alternately laminated dielectric ceramic layers and internal electrode layers, then the capacitor achieves compact size and high integration, but the posture becomes unstable during mounting on a board
Solution Approach 1:
The patent applies asymmetry by adding protrusions at four corners of the multilayer body that extend beyond the rectangular parallelepiped shape. This asymmetric modification to an otherwise symmetric rectangular structure provides stable mounting posture by creating defined contact points with the board, preventing the capacitor from tipping or shifting during soldering operations while maintaining the compact rectangular form factor.
2Length of stationary object
If the multilayer ceramic capacitor uses a thin profile design, then the capacitor achieves compactness and low height, but the structural stability during mounting operations deteriorates
Solution Approach 1:
The patent resolves the contradiction between thin profile and structural stability by transitioning from a two-dimensional stability problem to a three-dimensional solution. The protrusions extend in the width direction (perpendicular to the lamination direction), creating a footprint that engages with the board in multiple dimensions. This allows the capacitor to maintain a thin profile in the lamination direction while achieving stability through the protrusions that contact the board surface, effectively distributing mechanical loads across multiple contact points.
Data Source
AI summary
A multilayer ceramic capacitor includes a substantially rectangular parallelepiped multilayer body including dielectric ceramic layers and internal electrode layers laminated alternately in the lamination direction, first and second main surfaces opposed to each other in the lamination direction, first and second lateral surfaces opposed to each other in the width direction orthogonal or substantially orthogonal to the lamination direction, and first and second end surfaces opposed to each other in the length direction orthogonal or substantially orthogonal to the lamination direction and the width direction, and a pair of external electrodes at both ends of the multilayer body in the length direction to cover at least the first and second end surfaces, and connected to the internal electrode layers. A first protrusion is provided at each of four corners on a surface of at least one of the first and second main surfaces having a substantially rectangular shape.