Patent ID: 7767266
Filing Date: 2010-08-03
Classification: B05B,B23K,H05K

Abstract:
1. A method of jetting droplets of viscous medium onto a substrate, the method comprising the steps of: providing a jetting nozzle comprising a nozzle space and a nozzle outlet; feeding said viscous medium into the nozzle space; impacting said viscous medium with an impact mechanism, thereby jetting viscous medium from the nozzle space in the form of droplets through the nozzle outlet towards the substrate; and varying a volume of a droplet of the viscous medium independent of a stroke length of the impact mechanism, wherein the step of feeding comprises: prior to each step of impacting to jet each individual droplet, filling the nozzle space with said viscous medium to a varying degree to adjust the volume of the viscous medium in the nozzle space, the degree being adjusted in dependence on the volume of the droplet to be jetted after each step of impacting.