Eth Zurich

Julian Schneider

Dimos Poulikakos

Patrick Galliker

A method of printing a print pattern onto a substrate with a print head comprises a plurality of nozzles, where the print head has a rectangular active print head area which includes all of the nozzles. The active print head area is delimited by four sides defining a primary and a secondary direction. The method comprises i) decomposing the print pattern into a plurality of print pattern segments that have dimensions along the primary and secondary direction which are smaller than the dimensions of the active print head area along the primary and secondary direction; ii) assigning each print pattern segment to exactly one nozzle; iii) causing each nozzle to print the print pattern segment assigned to said nozzle. The print head is moved during printing of each print pattern segment within an area that is smaller than said active print head area.

Print pattern generation on a substrate

A print head () for depositing a liquid on a substrate comprises a layer structure including a stop layer () made of a dielectric material, an electrically conducting device layer (), and an insulator layer () made of a dielectric material. A nozzle () is formed in the layer structure. The nozzle has a nozzle opening () for ejecting the liquid. A ring trench () is formed around the nozzle. The nozzle opening and the ring trench are radially separated by an annular nozzle wall (). An ejection channel () is formed adjacent to the ring trench along the direction of ejection. An extraction electrode () is arranged on the insulator layer () and surrounds the nozzle.

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Zurich, Switzerland

Julian Schneider