Ceramic Electronic Component Rare Earth Concentration Control
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Solution Overview
Problem
Ceramic electronic components face challenges in achieving high-temperature load lifetime reliability, with existing technologies not adequately addressing the need for improved performance and longevity.
Innovation Solution
A ceramic electronic component design featuring an interior and exterior part with specific rare earth element concentrations in dielectric layers, where the exterior part has a higher rare earth element content than the interior part, optimizing the β−α ratio and area segregation to enhance high-temperature load lifetime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rare earth elements are added to improve high-temperature load lifetime, then reliability is improved, but manufacturing precision becomes more difficult to control
Solution Approach 1:
The patent employs parameter changes by establishing specific quantitative relationships between the rare earth element concentrations in different parts of the dielectric layer. The parameters α (interior part concentration) and β (exterior part concentration) are constrained by the relationships β-α≥0.20 and α/β≤0.88. These parameter specifications provide clear manufacturing targets and control criteria, enabling precise control of rare earth element distribution while achieving improved high-temperature load lifetime.
Data Source
AI summary
A ceramic electronic component includes an interior part and an exterior part. The interior part includes an interior part dielectric layer and an internal electrode layer. The exterior part includes an exterior part dielectric layer. The exterior part is positioned outside the interior part along a laminating direction thereof. The interior part dielectric layer and the exterior part dielectric layer respectively contain barium titanate as a main component. β−α≥0.20 and α/β≤0.88 are satisfied, where α mol part and β mol part are respectively an amount of a rare earth element contained in the interior and exterior part dielectric layers, provided that an amount of barium titanate contained in the interior and exterior part dielectric layers is respectively 100 mol parts in terms of BaTiO3.