| Title |
Dielectric Absorption of X7R Multilayer Ceramic Capacitors |
| Authors |
하민우(Min-Woo Ha) ; 공소정(So-Jeong Kong) ; 이준영(Jun-Young Lee) ; 김민기(Min Kee Kim) ; 석오균(Ogyun Seok) |
| DOI |
https://doi.org/10.5370/KIEE.2023.72.11.1393 |
| Keywords |
MLCC; X7R; Dielectric absorption; Capacitance |
| Abstract |
Multilayer ceramic capacitors (MLCCs) have been used in various electronics including electric vehicles. Dielectric absorption of BaTiO3-based X7R MLCCs is reported in the manuscript. We reviewed the dielectric absorption in detail which was not DC or AC characteristics. We fabricated the X7R MLCCs and measured the devices using an LCR meter, a test fixture, and two source measure units. The dielectric absorption was measured in the fabricated devices. And then the ω0, Cd, and Rd were altered by rms voltage of AC signals. However, these were not affected by the DC voltage. The C∞ from atomic or molecular polarization was not altered by the Vrms and VDC which means this study is right. When the operating frequency of the X7R MLCCs is less than the frequency when the dielectric absorption activates, the capacitance reduces from C∞ + Cd to C∞. We should suppress the dielectric absorption of the MLCCs which generates from an insulating layer. The dielectric absorption can be used to determine the mass production of commercial MLCCs. |