The Ink-jet method is the effective technology as a process to functionalize the by setting a functional material required for a required place. But conventional inkjet technology has a limitation in resolution of a few tens of micro-meters. We have developed a super-fine ink-jet technology (Super Ink Jet - SIJ) that enables the formation of fine features less than a micro-meter in diameter. Furthermore, the printing method is not limited by the tight viscosity requirements of normal inkjet inks and allows the use of a wide variety of inks: e.g. nano-metals, semiconductors, insulators, light emitting polymers, bio-materials etc. Using this method, the direct fabrication of circuits and three-dimensional structures with feature sizes of just a few microns has been achieved. The potential of the SIJ technology and its application to cutting-edge areas, such as flexible and printed electronics, fine-pitch direct interconnects and others will be shown.