Patent ID: 6506332
Filing Date: 2003-01-14
Classification: H05K

Abstract:
A method for filling vias in an electronic substrate comprising:providing a source of fill material; providing a pressure head coupled to the source of fill material via a fill material inlet, the pressure head further comprising an elongated fill material outlet which is substantially larger than the fill material inlet; placing the pressure head in contact with the electronic substrate; and pressurizing the fill material to inject fill material into the vias of the electronic substrate; wherein the pressure head comprises a pressure chamber and pressurizing the fill material to inject fill material into the vias of the electronic substrate results in fill material flowing into the pressure chamber in a direction away from the substrate being filled; wherein the pressure chamber is elongated and fill material flows into the pressure chamber from a plurality of inlets spaced along the length of the pressure chamber; and wherein the fill material is hindered from flowing out the fill material outlet from the fill chamber by a resistance member positioned within the pressure chamber between the plurality of inlets and the fill material outlet, the resistance member dividing the pressure chamber into at least two parts.