Capacitor Component Dielectric Patterns Prevent Electrode Bending

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Solution Overview

Problem

Multilayer ceramic capacitors face reliability issues due to structural irregularities caused by differences in thickness between internal electrodes and dielectric layers, leading to undesirable bending and reduced capacitance, which affects withstand voltage properties.

Innovation Solution

The capacitor component incorporates first and second dielectric patterns that extend to cover end portions of internal electrodes, maintaining a specific thickness ratio to prevent bending and enhance reliability by eliminating step portions and air traps.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If the number of layers being laminated is increased to achieve high capacitance, then capacitance is improved, but step portions are formed due to thickness differences between internal electrodes and dielectric layers, causing internal electrode bending and reliability degradation

Engineering Contradiction:
ImprovecapacitanceVSAvoidwithstand voltage properties
Core Design Contradiction:
Quantity of substanceVSReliability

Solution Approach 1:

The patent applies preliminary action by forming the dielectric pattern on the dielectric layer before laminating the internal electrodes. This dielectric pattern serves as a pre-formed structure that compensates for thickness differences, preventing step portions from forming during the densification process. By preparing this compensatory structure in advance, the patent eliminates the root cause of internal electrode bending while maintaining high capacitance through increased layer count.

Inventive Principle:
Principle #10Preliminary action

2Quantity of substance

If the number of layers being laminated is increased to achieve high capacitance, then capacitance is improved, but structural irregularities and air traps are formed, causing manufacturing complexity to increase

Engineering Contradiction:
ImprovecapacitanceVSAvoidstructural irregularities
Core Design Contradiction:
Quantity of substanceVSDevice complexity

Solution Approach 1:

The patent applies local quality by forming a dielectric pattern with specific thickness characteristics at the precise location where thickness differences occur between internal electrodes and dielectric layers. Rather than uniformly increasing the thickness of all dielectric layers, the invention locally compensates for thickness variations only where needed. This targeted approach eliminates step portions and air traps in critical areas while maintaining the overall high-capacitance structure through increased layer count.

Inventive Principle:
Principle #3Local quality

3Manufacturing precision

If margin portions are depressed to eliminate empty spaces formed by step portions, then empty spaces are reduced, but margin widths decrease and internal electrodes bend, worsening reliability

Engineering Contradiction:
Improveempty space eliminationVSAvoidinternal electrode stability
Core Design Contradiction:
Manufacturing precisionVSReliability

Solution Approach 1:

The patent applies preliminary action by forming the dielectric pattern before lamination to prevent step portions from forming in the first place. This pre-formed compensation structure eliminates the need to depress margin portions during the densification process. By addressing the thickness difference issue beforehand, the invention maintains both margin width and internal electrode stability while still achieving high manufacturing precision through the elimination of empty spaces.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentUS11145465B2Capacitor component
Publication Date: 2021.10.12 SAMSUNG ELECTRO MECHANICS CO LTD
  • US11145465B2 patent drawing
  • US11145465B2 patent drawing
  • US11145465B2 patent drawing

AI summary

Dielectric patterns may be additionally disposed in margin portions, and thicknesses of the dielectric patterns may be controlled to improve the reliability of a capacitor component.