Base-Metal Electrode-Multilayer Ceramic Capacitors: Past, Present and Future Perspectives

Abstract

Multilayer ceramic capacitor (MLCC) production and sales figures are the highest among fine-ceramic products developed in the past 30 years. The total worldwide production and sales reached 550 billion pieces and 6 billion dollars, respectively in 2000. In the course of progress, the development of base-metal electrode (BME) technology played an important role in expanding the application area. In this review, the recent progress in MLCCs with BME nickel (Ni) electrodes is reviewed from the viewpoint of nonreducible dielectric materials. Using intermediate-ionic-size rare-earth ion (Dy2O3, Ho2O3, Er2O3, Y2O3) doped BaTiO3 (ABO3)based dielectrics, highly reliable Ni-MLCCs with a very thin layer below 2µm in thickness have been developed. The effect of site occupancy of rare-earth ions in BaTiO3 on the electrical properties and microstructure of nonreducible dielectrics is studied systematically. It appears that intermediate-ionic-size rare-earth ions occupy both Aand B-sites in the BaTiO3 lattice and effectively control the donor/acceptor dopant ratio and microstructural evolution. The relationship between the electrical properties and the microstructure of Ni-MLCCs is also presented.

Microstructure effects on BaTiO3/BaTi0.8Zr0.2O3 composites properties

“…Barium titanate (BaTiO3) is a perovskite type (ABO3) ferroelectric material [1] employed as main component in a variety of environmentall-friendly electronic devices such as memory storage systems, piezoelectric transducers, pyroelectric detectors and multi-layer ceramic capacitors [2][3][4][5]. However, in order to meet the technological requirements that these devices must satisfy, i.e.…”

High temperature micropillar compression of Al/SiC nanolaminates

“…More recently, metal/ceramic multilayers have also been found as optically absorbing coatings in solar collectors for thermo-solar energy generation [8][9][10]. Finally, the development of cellular phones has pushed the research on base-metal electrode multilayer ceramic capacitors because of their high capacitance at large frequencies [13,14].…”

Piezoresponse properties of orderly assemblies of BaTiO3 and SrTiO3 nanocube single crystals

“…Barium titanate (BT) and strontium titanate (ST) are the most popular perovskite oxides for electronic device application such as multilayered ceramic capacitor (MLCC), positive temperature coefficient (PTC) thermistor, and so on. 6 The bulk BT has ferroelectricity at room temperature; in contrast, ST is a paraelectric material. It has been reported that BT/ST artificial superlattice thin film which consists of a few unit cells per layer has ferroelectricity and enhanced dielectric properties.…”