Multilayer Varistor with Low-Voltage Characteristics from ZnO + ACoO3 Ceramics (A = Ca, Sr and Ba)

Abstract

The non-linear properties provided from ZnO + ACoO3 ceramics (A=Ca,Sr and Ba) and their application to MLCV for ESD-suppression were studied. Their ceramics showed excellent non-linear I-V properties in lower voltage region. Especially, ZnO + SrCoO3 ceramics intrinsically had about 20 % lower Vgb than those of Pr and Bi-based ZnO varistors. MLCV using ZnO + SrCoO3 ceramics demonstrated extremely low-voltage property of V1mA= 5.6 V with maintaining excellent non-linearity and reliability performance against ESD.