Excellent permittivity-temperature stability and reliability performance of ultra-thin Ba0.97Ca0.03TiO3-based MLCCs. Issue 1 (2nd January 2023)

• Record Type: Journal Article
• Authors: Huang, Xiong; Zhang, Lei; Wang, Pengfei; Jian, Gang; Yang, Jun; Li, Bo; Yu, Shuhui; Sun, Rong; Fu, Zhenxiao; Cao, Xiuhua
• Is Part Of: Journal of Asian ceramic societies. Volume 11:Issue 1(2023)
• Page Start: 146
• Page End: 158
• Publication Date: 2023-01-02
• Subjects: ultra-thin MLCCs -- BCT raw powder -- permittivity-temperature stability -- reliability; Ceramics -- East Asia -- Periodicals; Materials science -- Periodicals; 620.1405
• DOI: 10.1080/21870764.2023.2166655
• Languages: English
• ISSNs: 2187-0764

Abstract

ABSTRACT: High-temperature stability and reliability are in high demand for ultra-thin multilayer ceramic capacitors (MLCCs), which are ubiquitous in electronic industries. Here, two doping matrices of BaTiO3 (BT) and Ba0.97 Ca0.03 TiO3 (BCT) are chosen to prepare ultra-thin MLCCs, whose effects on the microstructure, nonlinear dielectric properties, temperature stability, and reliability of the capacitors were investigated. Compared with BT-based MLCCs, BCT-based MLCCs possess better core-shell structures, thus, leading to a higher Schottky barrier for inhibiting carrier migration and improving aging performance. For the 1.5 μm-thickness capacitors using the BCT doping matrix rather than BT, the temperature coefficient of capacitance reaches the X7R standard, and the breakdown field increases from 148 to 172 V/μm. Moreover, the ability to resist insulation resistance degradation has been significantly improved. This work demonstrates the great potential of using BCT as the doping matrix to prepare ultra-thin MLCCs with excellent temperature stability and reliability.