INKJET DEVICE AND METHOD FOR THE CONTROLLED POSITIONING OF DROPLETS OF A SUBSTANCE ONTO A SUBSTRATE.

摘要

The invention provides a device for the controlled positioning of droplets of a substance onto a substrate, the device comprising at least a print head comprising a nozzle provided to eject the droplet, the inkjet device further comprising a control camera arranged such that after ejection of the droplet out of the nozzle, the droplet is detected by the control camera. In case either the droplet volume or velocity or flight path or viscosity or surface tension start to deviate from preset values, the software can correct for this in a closed loop manner. If the droplet is not ejected at all, the control software stops the printer and an operator can maintain the print head.