e minimum size of a feature that can be created with ink-jetted material depends on the amount of material in each droplet and practical considerations such as how much a drop will spread when it hits a given kind of substrate. The smallest line width an ink-jet head can produce is essentially equal to the diameter of a drop of material it ejects onto a given substrate. In one study, Dow Electronic Materials looked at the smallest features that could be created using its LithoJet ink in conjunction with ink-jet heads producing drops ranging from 80 to 1 pL. As one would expect, finer features are possible when inks are formulated to spread as little as possible.