A functional device fabrication apparatus is provided for forming a wiring pattern or an electronic device on a substrate using paper or paper-based material by depositing solid content of a solution on the substrate. The functional device fabrication apparatus includes a jet head. The jet head jets the solution including electronic function material onto the substrate as dot patterns. The jet head includes a device for dispensing a droplet of the solution from the jet head. A drive signal applied to the device is configured to cause the droplet jetted by the device to have a specific shape before impacting a face of the substrate.