Jetting device and a method of jetting device

A method of jetting droplets of viscous medium onto a substrate with a jetting device, said jetting device comprising a jetting outlet through which said droplets are jetted, comprising the steps of:

• jetting droplets of viscous medium onto the substrate by a non-contact dispensing process, and
• providing a gaseous flow past the jetting outlet such that an adverse effect on the performance of the jetting device that may result from accumulation of viscous medium residue at the jetting outlet is prevented, wherein the gaseous flow at the jetting outlet is directed along a flow path that intersects the jetting path of the jetted droplets, said flow path being essentially perpendicular to said jetting path at the jetting outlet, wherein said gaseous flow sweeps along the jetting outlet.

A device for jetting droplets of viscous medium onto a substrate, said device comprising:

• a nozzle having a jetting outlet through which said droplets are jetted using a non-contact dispensing process,
• a flow generator for producing a gaseous flow,
• a flow guide for providing a flow path for said gaseous flow past the jetting outlet such that an adverse effect on the performance of the jetting device that may result from accumulation of viscous medium residue at the jetting outlet is prevented, said flow guide being arranged for providing said flow path in a direction that intersects the jetting path of the jetted droplets, said flow guide being arranged for directing said gaseous flow essentially perpendicular to said jetting path at the jetting outlet, wherein said flow guide is arranged for directing said gaseous flow along the jetting outlet.