Dielectric Composition for Low-Temperature High-Density Firing

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Solution Overview

Problem

Existing dielectric compositions that do not include lead or alkali metals require high-temperature firing to achieve high density and relative permittivity.

Innovation Solution

Incorporating calcium and silicon in the subcomponent of the dielectric composition, along with tantalum and at least one of barium or strontium in the main component, allows for high density and relative permittivity even at relatively low firing temperatures.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a dielectric composition without lead or alkali metals is used, then environmental safety is improved, but high-temperature firing is required to achieve high density

Engineering Contradiction:

Improveharmful elements (lead, alkali metals)VSAvoidfiring temperature

Core Design Contradiction:

Object-affected harmful factorsVSTemperature

Solution Approach 1:

The patent changes the chemical composition parameters by introducing calcium and silicon as subcomponents alongside the main tantalum-barium-strontium system. This compositional parameter change enables the dielectric to achieve high density at lower firing temperatures without requiring lead or alkali metals, thus resolving the contradiction between environmental safety and firing temperature requirements

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite dielectric system combining multiple components: main component (tantalum, barium, strontium) and subcomponent (calcium, silicon). This composite structure synergistically achieves both low-temperature processability and high-density formation, eliminating the need for harmful elements while reducing firing temperature requirements

Inventive Principle:

Principle #40Composite materials

2Volume of stationary object

If high-temperature firing is applied, then high density is achieved, but manufacturing cost and energy consumption increase

Engineering Contradiction:

ImprovedensityVSAvoidenergy consumption

Core Design Contradiction:

Volume of stationary objectVSUse of energy by stationary object

Solution Approach 1:

By modifying the chemical composition to include calcium and silicon subcomponents, the patent changes the sintering behavior parameters of the dielectric material. This enables dense consolidation at lower temperatures, directly reducing energy consumption while maintaining high density, thus resolving the contradiction between density achievement and energy consumption

Inventive Principle:

Principle #35Parameter changes

3Volume of stationary object

If high-temperature firing is applied, then high density is achieved, but manufacturing complexity and time increase

Engineering Contradiction:

ImprovedensityVSAvoidmanufacturing process

Core Design Contradiction:

Volume of stationary objectVSEase of manufacture

Solution Approach 1:

The patent changes the compositional parameters by incorporating calcium and silicon, which modify the sintering characteristics to enable lower-temperature processing. This simplifies the manufacturing process by reducing equipment requirements, shortening cycle times, and easing quality control, while still achieving high density, thus resolving the contradiction between density and ease of manufacture

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12580128B2Dielectric composition and electronic component

Publication Date: 2026.03.17 TDK CORP

AI summary

A dielectric composition includes a main component containing tantalum and at least one of barium or strontium, and a subcomponent containing calcium and silicon.