Multilayer Ceramic Capacitor Structure for Moisture Resistance
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Solution Overview
Problem
Conventional multilayer ceramic capacitors lack high moisture resistance, which affects their durability and performance in humid environments.
Innovation Solution
A multilayer ceramic capacitor design that includes a multilayer body with dielectric and internal electrode layers alternately laminated, featuring side gap portions and external electrodes connected to internal electrode layers, with nickel and magnesium segregation between the side gap and outer layer portions to enhance humidity resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional multilayer ceramic capacitor structure is used, then manufacturing is simpler, but moisture resistance is insufficient
Solution Approach 1:
The multilayer body is segmented into outer layer portions and inner layer portions, with the outer layers containing segregated nickel and magnesium elements. This segmentation creates a protective barrier structure that specifically targets moisture resistance without complicating the overall device architecture.
Solution Approach 2:
Nickel and magnesium are segregated specifically in the outer layer portions adjacent to side gap portions, rather than uniformly distributed throughout. This local concentration of protective elements provides enhanced moisture resistance at critical interfaces while maintaining simplicity in other regions.
2Reliability
If nickel and magnesium are segregated between side gap portions and outer layer portions, then moisture resistance improves, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies preliminary actions by forming the outer layer portions with segregated nickel and magnesium elements during the initial sintering process. This preliminary structuring ensures that protective elements are positioned correctly before final assembly, reducing the need for post-manufacturing adjustments and lowering precision requirements for subsequent steps.
Data Source
AI summary
A multilayer ceramic capacitor includes a multilayer body including an inner layer portion including dielectric layers and internal electrode layers alternately laminated therein, two outer layer portions respectively provided on both sides of the inner layer portion in a lamination direction, and two side gap portions respectively provided on both side surfaces of the inner layer portion and the outer layer portions, in a width direction intersecting the lamination direction, and external electrodes respectively provided on both end surfaces of the multilayer body in a length direction intersecting the lamination direction and the width direction, and each connected to the internal electrode layers, wherein nickel and magnesium are segregated between the side gap portions and the outer layer portions.