Variable Capacitance Device Series Lamination

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Solution Overview

Problem

In variable capacitance devices, increasing the number of capacitors in a dielectric limits the design freedom of internal electrodes and capacitance values, narrows the spaces between internal electrodes and external terminals, leading to increased parasitic capacitances and manufacturing difficulties.

Innovation Solution

A variable capacitance device with multiple dielectric layers and internal electrodes, where capacitors are connected in series, allowing for reduced internal electrodes on each surface and increased space for electrode area adjustment, thereby enhancing design freedom and reducing parasitic capacitances.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the number of capacitors in a dielectric is increased, then the capacitance control range is improved, but the design freedom of internal electrodes is reduced and parasitic capacitances increase

Engineering Contradiction:

Improvecapacitance control rangeVSAvoidparasitic capacitances

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent divides the capacitor structure into multiple dielectric layers (first dielectric layer, second dielectric layer, etc.) with internal electrodes arranged alternately between them. This segmentation allows capacitors to be distributed across multiple layers rather than crowded in a single dielectric, reducing parasitic capacitances while maintaining design freedom for capacitance control.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent transitions from a two-dimensional arrangement of electrodes within a single dielectric to a three-dimensional laminated structure with electrodes distributed across multiple dielectric layers. This dimensional change provides additional space for electrode arrangement, reducing parasitic capacitances while preserving design freedom.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If the number of capacitors in a dielectric is increased, then the capacitance control range is improved, but manufacturing difficulty increases

Engineering Contradiction:

Improvecapacitance control rangeVSAvoidmanufacturing difficulty

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent segments the capacitor structure into multiple dielectric layers with internal electrodes, allowing for modular manufacturing. Each dielectric layer can be processed and assembled separately, simplifying the overall manufacturing process while enabling a larger number of capacitors to be constructed with controlled parasitic capacitances.

Inventive Principle:

Principle #1Segmentation

3Adaptability or versatility

If internal electrodes are increased on each surface, then the capacitance control range is improved, but the space for electrode area adjustment is reduced

Engineering Contradiction:

Improvecapacitance control rangeVSAvoidelectrode area adjustment space

Core Design Contradiction:

Adaptability or versatilityVSArea of moving object

Solution Approach 1:

The patent utilizes multiple dielectric layers stacked in the vertical dimension, providing additional space for internal electrode arrangement. This three-dimensional configuration allows sufficient electrode area for capacitance control while distributing electrodes across layers to maintain design freedom.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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 increases the range of capacitance variation, simplifies manufacturing, and suppresses parasitic capacitance effects between internal electrodes, offering greater design flexibility and reduced parasitic capacitance issues.

Implementation Method 1

a plurality of dielectric layers formed by a dielectric material changing in capacitance according to a control signal applied externally

Methodology Applied

Scientific EffectDielectric: Dielectric

Data Source

PatentUS9053862B2Variable capacitance device with a plurality of electrodes laminated via dielectric layers

Publication Date: 2015.06.09 DEXERIALS CORP

AI summary

A variable capacitance device including: a device body having a plurality of dielectric layers formed by a dielectric material changing in capacitance according to a control signal applied externally and laminated in a predetermined direction and an internal electrode section including at least one internal electrode formed in each of both surfaces of each dielectric layer, three or more capacitors being formed by the plurality of dielectric layers and the internal electrode section, and the three or more capacitors being connected in series with each other; and at least three control terminals supplied with the control signal, and respectively arranged for at least three internal electrodes forming at least two capacitors of the three or more capacitors.