Researchers developed a new printed circuit technology

Researchers developed a new printed circuit technology

According to physorg site July 2, 2007 report, the future of electronic learning goal is to print as large as the printing of flexible circuits. Although a light in the development of flexible organic materials have made great progress, and these advances have been applied to this circuit, but the large accumulation of these materials, the methods have not been successful. Recently, a research team developed a circuit printing technology, which can solve the trouble trying to make other related issues. One problem is that other methods can not produce a micron, or millionths of a meter-class very high-resolution features, perhaps the most serious problems. Another problem is that as the electrode conductivity of polymer materials is very low, suggesting that you need to add inorganic (metal) of electrical contacts. Another problem is that when the ink is layered, the small amount of ink will be mixed together. Most types of printing technology will occur this problem. Following the usual graphic printing process, the final outcome will not be affected. However, if you are using "electronic ink", ink mixing will jeopardize the electrical characteristics of the circuit.

The research team included members of the Du Ponte, Division of Materials Science and Engineering, scientist and OrganicID company of scientists, which OrganicID is a subsidiary of Weyerhaeuser, the main production printable RFID (radio frequency identification Kam ) plastic labels. Research team produced a printing plate, the printing plate can be printed in a row has a power connector?? Drainage lines of the thin film transistor array plane. The length of each transistor to two microns (equivalent to the power connector and a separate drainage line distance). This is by far the circuit printing process can achieve the shortest channel length, has the potential to scale to printing presses. This printing plate from the special polymer material, the material attached to a flexible polyester film (a plastic sheet), electronic materials resistant to chemical solvents used.

Of a member of the University of Gelaxila Du Ponte. Balanqiete said: "Our vision is to bring a new generation of nano-based high-resolution printing plate and ink combination, and thus for the manufacture of electronic equipment provide a platform that people see today is very similar to commercial printers. "

Researchers silver nanoparticles solution to the printing plate coated with ink, the solution evaporated, the printing plate will leave a layer of dry film of silver particles (so as to avoid any mixing issues). Then, the team pressed the plate to the polyester film substrate, so that way, not only does not reduce the resolution of images, again nanoparticle transfer from the bulge plate to polyester film. At this point, has been printed silver pattern can be sintered (a heating process used to increase the conductivity of films).

The pattern as a line of "overlapping" of power lines and drainage lines form, more precisely, by two interwoven lines, of which the power cord on the left side, drainage line located on the right. The width of these lines were 2 microns (equivalent to the transistor channel length). Each row of overlapping lines (which lines the number of coupling ranged from 17 to 120) is equivalent to a transistor: the left side of the line are connected together, as the power transistor, the right side of the line is connected, and act as a transistor drainage lines.

Researchers published their good silver particles drying thin-film transistor with them using the "photo lithography," Production of gold particles compared transistors, they found that the electronic properties of the two is almost identical. June 7's "Applied Physics Letters," Online research on this for a more detailed description.

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