The largest class of ceramic capacitors produced, in numbers and in value, is the multilayer type. In its simplest form, a capacitor consists of a pair of parallel metal plates separated by free space. When a voltage is applied across the plates, a charge is developed on them that are proportional to the applied voltage. If an insulating material is placed between the plates, the charge on the plates increases by the relative dielectric constant. High values of dielectric constant make BaTiO3 ceramic a popular choice for use in capacitors. The first multilayer capacitors made from polycrystalline BaTiO3 ceramics were produced in the early 1950s. A multilayer ceramic capacitor is depicted on Fig. 8 [22].