| Title |
Effects of Test Fixtures on Electrical Characteristics of X7R 630 V Multilayer Ceramic Capacitors |
| Authors |
하민우(Min-Woo Ha) ; 김태은(Taeeun Kim) ; 이준영(Jun-Young Lee) ; 김민기(Min Kee Kim) ; 석오균(Ogyun Seok) |
| DOI |
https://doi.org/10.5370/KIEE.2020.69.12.1886 |
| Keywords |
MLCC; Test fixture; Capacitance; Equivalent series resistance |
| Abstract |
Electrical characteristics of multilayer ceramic capacitors (MLCCs) should be measured precisely because the equivalent series resistance (ESR) is considerably low. It is also difficult to measure impedance of the MLCCs at self resonance frequency due to its high parasitic resistance of the test environment. In this work, we investigated the capacitance, ESR, and dissipation factor of X7R 630 V, 0.47 μF MLCC with three-different environments using a probe station and two test fixtures (16334A and 16034E). The 16034E test fixture can be directly connected to the LCR meter without any cable. We measured two MLCCs from different two vendors named by MLCC type1 and type2, respectively. The ESR of the MLCC type1 was 4.3 Ω, 6.9 Ω, and 4.1 Ω at the AC effective voltage of 1 V and 1 kHz using the probe station, 16334A and 16034E test fixtures, respectively. The ESR of the MLCC type2 was 4.9 Ω, 5.3 Ω, and 3.8 Ω at the same condition using the probe station, 16334A and 16034E test fixtures, respectively.
The tweezer test fixture (16334A) had a problem of parasitic resistance between contact in the fixture and electrode in the MLCC, which increased both ESR and DF. It was also difficult to extract self-resonant frequency using the tweezer test fixture because of high ESR |