Multi-Nozzle Print Head

A print head for depositing a liquid on a substrate, the print head comprising a layer structure including, in this sequence along a direction of ejection, the following layers:

• a stop layer made of a dielectric material;
• a device layer deposited on the stop layer;
• and
• a first insulator layer being made of a dielectric material and being deposited on the device layer;
• wherein at least one first nozzle is formed in the layer structure, the first nozzle having a nozzle opening for ejecting the liquid, said nozzle opening extending through the layer structure,
• wherein a ring trench is formed in the device layer, said ring trench radially surrounding the first nozzle,
• wherein the nozzle opening and the ring trench are radially separated by an annular nozzle wall, said annular nozzle wall having a distal end surface,
• wherein an ejection channel is formed in the first insulator layer, said ejection channel being centered around the first nozzle and extending from the first insulator layer all the way to the distal end surface of the nozzle, and
• wherein a first extraction electrode is arranged on the first insulator layer and surrounds the first nozzle.