Improved lifetime reliability of MLCC against water vapor by forming an interfacial alloy between internal and external electrodes

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-09-19 DOI:10.1016/j.jeurceramsoc.2025.117832

Kyung Joo Lee , Jae Won Lee , Nhat Nam Hoang , Yunjung Park , Byung Sung Kang , Wook Jo , Honggi Kim , Yong-Gyu Han , Min-Hoe Kim , Mingon Lee , Jinsung Chun

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引用次数: 0

Abstract

Voltage, temperature, and humidity are typical stressors used in high accelerated life testing (HALT) of multilayer ceramic capacitors (MLCCs). Especially in the case of humidity, there is no initial insulation resistance (IR) change and no IR degradation during HALT, indicating that the failure mechanism causing lifetime acceleration for humidity is different from voltage and temperature. This study confirms that there is no IR degradation during HALT against humidity, as protons generated by electrolysis of infiltrating water vapor at the anode electrode cause IR degradation through proton migration in a very short time. In addition, the water vapor-induced failures were caused in the region between the internal and external electrodes. Sintering in a low reducing atmosphere can inhibit these failures by forming an alloy between electrodes to maintain the film shape. Furthermore, the stretched exponential fitting method accurately accelerates specific water vapor-related failure modes when all MLCC lifetime modes coexist.

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通过在内外电极之间形成界面合金，提高了MLCC抗水蒸气的寿命可靠性

电压、温度和湿度是用于多层陶瓷电容器（mlcc）高加速寿命测试（HALT）的典型应力源。特别是在有湿度的情况下，在HALT过程中，初始绝缘电阻（IR）没有变化，IR也没有退化，说明湿度导致寿命加速的失效机制不同于电压和温度。本研究证实了HALT在抗湿过程中不存在红外降解，这是由于阳极电极上渗透水蒸气电解产生的质子在极短的时间内通过质子迁移导致了红外降解。此外，水蒸气诱发的失效发生在内外电极之间的区域。在低还原性气氛中烧结可以通过在电极之间形成合金以保持薄膜形状来抑制这些失效。此外，当所有MLCC寿命模式共存时，拉伸指数拟合方法可以准确地加速特定的水蒸气相关失效模式。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.