Capacitor Close Contact Portion Enhances Electrode Adhesion

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Capacitors with nanoscale microstructure internal electrodes face issues with adhesiveness between the dielectric layer and conductor layers, leading to potential interface removal and reduced element properties due to stress or handling effects.

Innovation Solution

Incorporating a close contact portion with resin or metal material layers that bring the external electrode layers into close contact with the dielectric layer, enhancing adhesiveness and preventing delamination, while allowing for materials with low mutual adhesive strength to be used.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If nanoscale microstructure internal electrodes are used to downsize the element, then the element size is reduced and capacity is increased, but the connection area with conductor layers becomes very small, leading to poor adhesiveness and potential interface removal

Engineering Contradiction:

Improveelement sizeVSAvoidadhesiveness between dielectric layer and conductor layer

Core Design Contradiction:

Volume of moving objectVSStrength

Solution Approach 1:

The internal electrodes are segmented into multiple minute electrodes arranged in parallel, each contributing to the overall capacitance. This segmentation allows the electrodes to be filled throughout the dielectric layer volume, increasing the effective connection area with conductor layers while maintaining compact element dimensions

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent transitions from planar electrode connections to three-dimensional distributed connections by filling multiple through-holes with internal electrodes. This vertical distribution through the dielectric layer thickness dimension significantly increases the total connection area between electrodes and conductor layers, resolving the adhesiveness problem while maintaining small footprint

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If conventional materials with low mutual adhesive strength are used, then material selection flexibility is improved, but the interface may be removed due to stress or handling effects

Engineering Contradiction:

Improvematerial selection flexibilityVSAvoidinterface stability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies different material properties to different regions: the internal electrodes use materials optimized for capacitance, while the external electrode layers use materials optimized for adhesion to the dielectric layer. This local differentiation allows flexible material selection for each component while ensuring reliable interfaces through appropriate material pairing

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The capacitor structure combines multiple materials with complementary properties: dielectric layer, internal electrode materials, and external electrode materials. This composite approach enables selection of materials based on their specific functions, achieving both versatility in material choice and reliability in interface stability

Inventive Principle:

Principle #40Composite materials

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

Improves the adhesive strength of external electrode layers on the dielectric layer, increasing the durability of the capacitor and allowing for a wider selection of materials, thereby preventing interface removal and maintaining element characteristics.

Implementation Method 1

a close contact portion, which brings at least any one of the first external electrode layer and the second external electrode layer into close contact with the dielectric layer

Methodology Applied

Scientific EffectAdhesion: Adhesive

Data Source

PatentUS9214277B2Capacitor having a plurality of minute internal electrode portions filled by a dielectric layer

Publication Date: 2015.12.15 TAIYO YUDEN KK

AI summary

A capacitor includes a dielectric layer, a first external electrode layer, a second external electrode layer, a first internal electrode portion, a second internal electrode portion, and a close contact portion. The dielectric layer includes a first surface, a second surface facing the first surface, and a plurality of through-holes communicating between the first surface and the second surface. The first internal electrode portion is provided on a first through-hole portion. The second internal electrode portion is provided on a second through-hole portion. The close contact portion brings at least one of the first external electrode layer and the second external electrode layer into close contact with the dielectric layer, the close contact portion being provided on a third through-hole portion, the third through-hole portion being the remaining portion of the plurality of through-holes.