US Patent 7135955 Electrical component with a negative temperature coefficient

An electrical component includes a base having at least a first ceramic section and a second ceramic section. The first ceramic section and the second ceramic section include different materials, which have resistances with negative temperature coefficients. The component also includes first and second contact layers on the base. The first and second ceramic sections are between the first and second contact layers. A plurality of stacks of electrically conductive electrode layers are arranged inside the base. Stacks of electrode layers are electrically connected to the first and second contact layers.