Multilayer Ceramic Component Lithium Additive Sintering
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Solution Overview
Problem
Multilayer ceramic electronic components face challenges in achieving uniform sintering properties and adhesion between internal electrodes and dielectric layers, leading to inconsistencies in performance and reliability.
Innovation Solution
Incorporating lithium-containing additives trapped within internal electrodes, which are alternately stacked with dielectric layers, to enhance sintering properties and adhesion by promoting close adhesion and reducing sintering temperature differences, thereby improving connectivity and dielectric properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional sintering methods are used without lithium-containing additives, then the sintering process is simpler, but differences in sintering properties between internal electrodes and dielectric layers increase and adhesion deteriorates
Solution Approach 1:
The patent changes the chemical composition parameter of the internal electrodes by incorporating lithium-containing additives. This compositional modification enables the internal electrodes to release lithium during sintering, which diffuses into the dielectric layers and promotes uniform sintering properties and strong adhesion between the internal electrodes and dielectric layers, resolving the contradiction between improved adhesion and increased composition complexity.
2Manufacturing precision
If lithium-containing additives are incorporated in internal electrodes, then sintering properties and adhesion are improved, but the manufacturing process becomes more complex
Solution Approach 1:
The patent applies preliminary action by pre-incorporating lithium-containing additives into the internal electrode composition before the sintering process. This preliminary incorporation ensures that lithium is available during sintering to promote uniform sintering properties and adhesion, achieving manufacturing precision improvement while managing process complexity through advance material preparation.
3Reliability
If uniform sintering properties are achieved through lithium diffusion, then adhesion is improved, but lithium distribution control becomes more difficult
Solution Approach 1:
The patent applies local quality by creating a non-uniform lithium concentration distribution where the vicinity of the internal electrode interfaces has higher lithium concentration than the center of the dielectric layer. This localized lithium enrichment at critical interfaces promotes close adhesion where it is most needed, while accepting varying lithium concentrations in different regions of the dielectric layer, thus resolving the contradiction between adhesion improvement and uniform distribution control.
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
The approach results in improved moisture resistance, increased capacitance, and enhanced reliability by ensuring close adhesion and uniform sintering, while suppressing short-circuiting and vertical cracks, thus improving the overall performance of the multilayer ceramic electronic components.
Implementation Method 1
an additive containing lithium trapped in the internal electrodes
Implementation Method 2
Internal electrodes and dielectric layers included in a body of a multilayer electronic component may be simultaneously sintered to form the body
Implementation Method 3
close adhesion between the internal electrodes and the dielectric layers may be improved
Data Source
AI summary
A multilayer ceramic electronic component includes a plurality of dielectric layers; and internal electrodes disposed on the dielectric layers and containing an additive. The additive contains lithium (Li) and a dielectric material.