Solution Processable Transistors and Switches: Plotter Printing and Spray Deposition of Materials

Petro Lutsyk, Marcin Sojka, Krzysztof Janu, Juliusz Sworakowski.
Wroclaw University of Technology (2014).

Organic electronic devices, like field-effect transistors (FETs) or switches, have received extensive attention because of their potential application in flexible electronics, large-area displays, radio-frequency identification tags (RFIDs), sensors, etc. Crucial advantage of organic electronics rests in a prospect of low cost manufacturing of electronic circuits achievable by deposition of electronic components from solution by, e.g, ink-jet printing and spray coating. The printing is desirable in the case of fine structures like interdigitated electrodes while spray brushing is more effective for fabrication of large area thin films.

A common challenge in most printing techniques is the limitation in feature size. The line width of 20-100 um is achievable with standard ink-jet printers. The size of printed features may be decreased down to a few microns using laster-assisted technique at the price, however, of a dramatic increase of the cost of fabrication. One of the ways of obtaining small-size features of printed elements may be paved by plotter printing. Advantage of the plotting technique is possibility of drawing very smooth lines enabling one to achieve short (ca 5 um) channel between source and drain electrodes.