Reinforced Multilayer Capacitor Structure for Thin-Body Rigidity
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Solution Overview
Problem
Multilayer ceramic capacitors face challenges in securing rigidity when reduced in thickness, leading to potential defects during mounting and structural instability.
Innovation Solution
Incorporating a reinforcing portion made of sintered ceramic on the surface of the capacitor, which includes alumina components and magnesium oxide as a sintering aid, to enhance rigidity and structural stability without increasing thickness excessively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the thickness of the multilayer ceramic capacitor is reduced to make it smaller, then the size of the capacitor is decreased, but the rigidity of the capacitor deteriorates
Solution Approach 1:
The capacitor structure is segmented into functional layers (dielectric layers, internal electrodes) and a separate reinforcing layer. The reinforcing layer is applied only on specific surfaces where mechanical support is needed, while leaving other surfaces thin for electrical functionality. This segmentation allows the capacitor to maintain small overall size while having localized rigid reinforcement.
Solution Approach 2:
The capacitor exhibits non-uniform thickness distribution: the main body maintains reduced thickness for small size, while specific surfaces have an added reinforcing layer for rigidity. This local quality variation ensures that rigidity is enhanced only where mechanically critical, without compromising the miniaturization goal in other areas.
2Volume of moving object
If the thickness of the multilayer ceramic capacitor is reduced, then the size is decreased, but the structural stability deteriorates
Solution Approach 1:
The capacitor is segmented into a thin functional body and a separate reinforcing coating applied on specific surfaces. This segmentation allows the bulk structure to remain thin and compact while the surface reinforcement provides structural stability during mounting and operation.
Solution Approach 2:
The capacitor employs a composite structure combining the dielectric ceramic material with a reinforcing ceramic or ceramic-like coating layer. This composite approach integrates materials with different properties: the dielectric material provides electrical functionality while the reinforcing material provides structural stability, achieving both miniaturization and mechanical robustness.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively improves the rigidity and structural stability of the multilayer capacitor, reducing the likelihood of defects and maintaining high performance even at small thicknesses, while minimizing height differences between the body and external electrodes.
Implementation Method 1
a reinforcing portion disposed on a surface of the body, not covered by at least one of the first and second external electrodes, and including a sintered ceramic body
Data Source
AI summary
A multilayer capacitor includes a body including a dielectric layer and first and second internal electrodes stacked on each other and having the dielectric layer interposed therebetween; a pair of first external electrodes respectively disposed on first and second corners of the body, which are not adjacent to each other, and connected to the first internal electrode; a pair of second external electrodes respectively disposed on third and fourth corners of the body, which are not adjacent to each other, and connected to the second internal electrode; and a reinforcing portion disposed on a surface of the body, not covered by at least one of the first and second external electrodes, and including a sintered ceramic body.