Patent ID: 7380690

Claim:
A solution jet type fabrication apparatus for fabricating a wiring pattern or a device, the solution jet type fabrication apparatus comprising: a holder configured to hold a substrate horizontally to allow a wiring pattern or a device to be formed on said substrate; a data input unit for supplying droplet ejection information; a jet head for ejecting a droplet of a solution containing conductive fine particles onto the substrate by vaporizing a volatile ingredient of the solution, and allowing a solid component to remain on the substrate, to form the wiring pattern or the device in a forming area of the substrate in accordance with the droplet ejection information supplied by the data input unit; and a driving unit that moves at least one of the jet head and the holder relatively to the other, wherein the jet head is positioned above the substrate, wherein the jet head includes a nozzle from which the droplet is ejected onto said substrate and electrodes to connect each other, the nozzle being formed from a material that has a greater hardness than that of the conductive fine particles in the solution, wherein the jet head has a droplet ejecting face for ejecting the droplet, and the droplet ejecting face faces the forming area of the substrate with a distance of 1 mm to 3 mm from the substrate, wherein the droplet ejection speed of the jet head is faster than the relative moving speed between the jet head and the substrate, wherein the nozzle has a size that is equal to or less than Φ20 μm, each of the conductive fine particles has a size Dp equal to or larger than 0.0005 μm so that the conductive fine particles are dispersed in a stable state, and the size Dp is determined by a relationship Dp/Do≦0.01 so as to prevent clogging of the nozzle, and Do represents a diameter of the nozzle, wherein the size D p is equal to or less than the roughness of a surface of the substrate.