Some articles on metallization:

Construction and Styles - Multi-layer Ceramic Capacitors (MLCC Chips) - NME and BME Metallization
... Influence of the metallization on the voltage dependence of X7R ceramic multilayer chip capacitors Structure of the electrodes and the NME respectively BME metallization of ... This material composition is called "NME" (Noble Metal Electrode) metallization and lends very good electrical properties to ceramic capacitors, class 2 ones, too ... These cost pressures led to the development of BME (Base Metal Electrode) metallization for the electrodes and the terminals using the much cheaper materials nickel and ...