Patent ID: 6960373

Claim:
A method for generating a continuous stream of liquid solder metal droplets for selective application to locations on a substrate comprising: positioning a substrate on a stationary support; maintaining said substrate in a stationary position on the stationary support; producing a continuous stream of liquid solder metal droplets from a reservoir of liquid solder metal; selectively directing said stream of liquid solder metal droplets in a first dimension and a second dimension, such that solder is deposited at said locations on said substrate maintained in a stationary portion located on said stationary support, said selectively directing comprising: raster scanning said stream of liquid solder metal droplets, said raster scanning including electrically charging said stream of liquid solder metal droplets; electrostatically deflecting said electrically charged stream of liquid solder metal droplets in a first variable electrostatic potential in said first dimension for contacting portions of said substrate located on said stationary support; electrostatically deflecting said electrically charged stream of liquid metal droplets in a second variable electrostatic potential in said second dimension to said locations on said substrate located on said stationary support; and blanking selectively said stream of liquid solder metal droplets to prevent a portion of said stream of liquid solder metal droplets from contacting said substrate located on said stationary support.