A circuit board includes a capacitor and a circuit substrate. The method includes combining a plurality of cells and arithmetic units to form a plurality of groups, assigning a cache unit to a group, and connecting the cache unit to a higher level unit via a tree structure. The invention further relates to a piece of kitchen furniture having a useful surface area and at least one functional element arranged above the useful surface area, wherein the functional element is arranged on a support member, wherein the support member has a stem arranged on the piece of furniture within the useful surface area, the upper end of which extends above the useful surface area.