Multi-Layer Ceramic Capacitor Thin Side Margin Strength

Solution Overview

Problem

Multi-layer ceramic capacitors with thin side margins suffer from reduced mechanical strength, leading to potential structural disorders and impaired breakdown voltage characteristics when high voltage is applied due to electrostriction.

Innovation Solution

A multi-layer ceramic electronic component is designed with layered internal electrodes and crystal grains, where the crystal grains grow into pores of the electrodes, increasing density and mechanical strength, and the side margins are made thin to enhance capacitance while inhibiting excessive grain growth to prevent deformation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If side margins are made thin to reduce size and increase capacitance, then the mechanical strength decreases and structural disorder is likely to occur

Engineering Contradiction:

ImprovesizeVSAvoidmechanical strength

Core Design Contradiction:

Volume of moving objectVSStrength

Solution Approach 1:

The patent applies local quality by creating a dual-density structure where the side margin region has a different density configuration than the central region. Specifically, the side margin includes a first density region with lower density and a second density region with higher density, allowing the thin side margin to maintain adequate mechanical strength while keeping the overall component size reduced.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent changes the density parameter within the side margin region by creating distinct density zones. The first density region has a lower density than the second density region, which allows for stress distribution and prevents structural disorder while maintaining thin side margins. This parameter change enables both size reduction and mechanical strength preservation.

Inventive Principle:

Principle #35Parameter changes

2Quantity of substance

If side margins are made thin to increase capacitance, then breakdown voltage characteristics are likely to be impaired

Engineering Contradiction:

ImprovecapacitanceVSAvoidbreakdown voltage characteristics

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The patent applies local quality by creating a dual-density structure where the side margin region has a different density configuration than the central region. Specifically, the side margin includes a first density region with lower density and a second density region with higher density, allowing the thin side margin to maintain adequate mechanical strength while keeping the overall component size reduced.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent changes the density parameter within the side margin region by creating distinct density zones. The first density region has a lower density than the second density region, which allows for stress distribution and prevents structural disorder while maintaining thin side margins. This parameter change enables both size reduction and mechanical strength preservation.

Inventive Principle:

Principle #35Parameter changes

3Shape

If excessive grain growth is inhibited to prevent deformation of internal electrodes, then the density and mechanical strength may be reduced

Engineering Contradiction:

Improveshape stability of internal electrodesVSAvoidmechanical strength

Core Design Contradiction:

ShapeVSStrength

Solution Approach 1:

The patent applies local quality by creating a dual-density structure where the side margin region has a different density configuration than the central region. Specifically, the side margin includes a first density region with lower density and a second density region with higher density, allowing the thin side margin to maintain adequate mechanical strength while keeping the overall component size reduced.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent changes the density parameter within the side margin region by creating distinct density zones. The first density region has a lower density than the second density region, which allows for stress distribution and prevents structural disorder while maintaining thin side margins. This parameter change enables both size reduction and mechanical strength preservation.

Inventive Principle:

Principle #35Parameter changes

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 configuration achieves high mechanical strength and reduced likelihood of delamination, maintaining high capacitance and breakdown voltage even with thin side margins, thereby addressing the structural disorder issues.

Implementation Method 1

when sintering is performed under a condition that the excessive grain growth of the first crystal grain is inhibited

Methodology Applied

Scientific EffectSintering: Sintering

Implementation Method 2

the first crystal grain grows in the first direction and enters the pore of the internal electrode

Methodology Applied

Scientific EffectGrain growth:

Implementation Method 3

a structural disorder is likely to occur in the vicinity of the side margins by electrostriction or the like when a high voltage is applied

Methodology Applied

Scientific EffectElectrostriction: Electrostriction

Data Source

PatentUS11145458B2Multi-layer ceramic electronic component

Publication Date: 2021.10.12 TAIYO YUDEN KK

AI summary

A multi-layer ceramic electronic component includes a plurality of layered internal electrodes and a first crystal grain. The plurality of layered internal electrodes are disposed at intervals in a first direction and each include a pore. The first crystal grain has a larger diameter in the first direction than the interval and has a part disposed in the pore.