@article{CAI2025, 
author = {Zhen-Hao CAI and Yi-Fan ZHAO and Lei ZHANG and Jie YU and Xiu-Hua CAO and Zhen-Xiao FU and Rong SUN},
title = {Research on the Dielectric Performance and Reliability of Ultra-Thin Layer MLCC with Core-Shell Structure Regulation by Ho Element},
year = {2025},
journal = {Advanced Ceramics},
volume = {46},
number = {5},
pages = {470-483},
keywords = {MLCC, Core-shell structure, Dielectric properties, Reliability, X5R},
url = {https://www.sciopen.com/article/10.16253/j.cnki.37-1226/tq.2025.05.005},
doi = {10.16253/j.cnki.37-1226/tq.2025.05.005},
abstract = {As electronic devices continue to miniaturize, improving the dielectric performance and reliability of Multilayer Ceramic Capacitors (MLCC) during ultra-thin layer development has become a critical challenge. This study achieved significant optimization of BaTiO3-based ceramic dielectric layers in ultra-thin MLCCs through precise control of the "core-shell" structure. Research shows that adjusting Ho doping concentration can effectively regulate the characteristics of the "core-shell" structure, thereby optimizing the dielectric performance and reliability indicators of MLCCs. When the Ho doping concentration reaches 1.5 mol%, the shell concentration increases significantly, and the material exhibits excellent dielectric properties: room temperature dielectric constant reaches 3820, dielectric loss remains below 2.0%, and demonstrates outstanding temperature stability with a temperature coefficient of capacitance not exceeding 15% within the -55 ℃ to 100 ℃ range. Notably, when Ho doping increases to 2 mol%, although the increased shell thickness leads to changes in the core-shell ratio resulting in slightly decreased dielectric performance, the material's insulation resistance improves significantly, enhancing overall reliability. This study systematically elucidates the structure-property relationships among Ho doping concentration, "core-shell" structural characteristics, and material performance, providing important theoretical guidance and experimental foundation for the structural design and performance optimization of ultra-thin MLCC dielectric materials. These findings hold significant scientific and practical value for advancing the development of next-generation high-performance MLCCs.}
}