An apparatus for fabricating a functional device mounting board comprises a holder for holding a substrate on which functional devices are to be formed, a jet head for ejecting a droplet containing a functional material onto the substrate, and a data input unit for supplying droplet ejection information to the jet head. The processor also has access to the aircraft’s state, e. Data is compared to the stored information regarding expressions in only a single pass through the data. Electrical contacts are held by the insulator.