Aligned Electrode Capacitance Element for Resonance Circuit Reliability

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Solution Overview

Problem

Existing electrostatic capacitance elements with serially connected capacitors face issues with increased electrode resistance due to irregularly shaped internal electrodes and uncontrolled internal stress, leading to suboptimal electrical characteristics and reliability in resonance circuits.

Innovation Solution

The electrostatic capacitance element is designed with internal electrodes laminated such that their centers align in a straight line, reducing electrode resistance and concentrating residual stress on capacitor centers, thereby improving electrical characteristics and reliability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If internal electrodes are arranged with centers aligned in a straight line in the lamination direction, then residual stress concentration is improved and electrical characteristics are enhanced, but electrode design flexibility is reduced

Engineering Contradiction:

Improveelectrical characteristicsVSAvoidelectrode design flexibility

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent applies asymmetry by deliberately positioning internal electrodes with their centers aligned in a straight line in the lamination direction, creating an asymmetric stress distribution pattern that concentrates residual stress at specific capacitor centers. This asymmetric arrangement resolves the contradiction by prioritizing electrical characteristics over design flexibility, as the aligned configuration optimizes stress concentration for improved capacitance and variable rate performance.

Inventive Principle:

Principle #4Asymmetry

2Ease of manufacture

If internal electrodes are arranged irregularly to reduce stress, then manufacturing complexity is reduced, but electrode resistance increases

Engineering Contradiction:

Improvestress controlVSAvoidelectrode resistance

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent applies homogeneity by arranging internal electrodes with their centers aligned in a straight line, creating a uniform and systematic pattern throughout the capacitor structure. This homogeneous arrangement ensures consistent stress distribution and predictable electrical characteristics, resolving the contradiction by demonstrating that a regular (not irregular) pattern can simultaneously achieve stress control and low electrode resistance through its systematic and uniform nature.

Inventive Principle:

Principle #33Homogeneity

3Device complexity

If internal electrodes are designed without considering stress concentration, then design simplicity is maintained, but capacitance performance deteriorates

Engineering Contradiction:

Improvedesign complexityVSAvoidcapacitance and variable rate

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent applies preliminary action by pre-planning and designing the internal electrode arrangement with center alignment in the lamination direction before manufacturing. This preliminary consideration of stress concentration in the design phase enables the capacitor to achieve optimal capacitance and variable rate performance, resolving the contradiction by showing that incorporating stress considerations into the initial design does not significantly increase complexity while dramatically improving performance.

Inventive Principle:

Principle #10Preliminary action

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

This configuration enhances the electrical characteristics and reliability of the capacitance element by minimizing resistance between capacitors and maximizing residual stress concentration, leading to improved capacitance and variable rate performance.

Implementation Method 1

internal stress is generated by shrinkage of the dielectric layer at the time of sintering

Methodology Applied

Scientific EffectShrinkage: Thermal Contraction

Implementation Method 2

residual stress concentrates on the centers of the capacitors formed inside

Methodology Applied

Scientific EffectResidual stress: Stress Relaxation

Data Source

PatentUS9853619B2Electrostatic capacitance element and resonance circuit

Publication Date: 2017.12.26 DEXERIALS CORP

AI summary

A capacitance element body is configured by two or more capacitors, the capacitors being formed of a dielectric layer and at least three internal electrodes, the internal electrodes each being laminated via the dielectric layer and arranged to allow a center of gravity of an electrode body forming electrostatic capacitance to be arranged on a straight line in a lamination direction. In the capacitance element body, said two or more capacitors are serially connected in a lamination direction of the internal electrodes. Furthermore, external terminals, each being electrically connected to an electrode body forming electrostatic capacitance, are formed in side surfaces of the capacitance element body.