Patent ID: 7735715

Claim:
Method for mounting a semiconductor chip onto a substrate, comprising the steps of: positioning a solder dispenser over the substrate and passing a length of solder wire through the solder dispenser to the substrate; controlling the feeding of wire to the substrate with a wire feeder in a feeding direction; moving the solder dispenser relative to the substrate with a positioning device along at least one of two orthogonal axes that are substantially perpendicular to the feeding direction contemporaneously with feeding solder wire to the surface of the substrate in order to dispense a line of molten solder onto the substrate; and thereafter mounting the semiconductor chip onto the molten solder that has been dispensed onto the substrate; the method further comprising the steps of: covering the substrate with a cover having an opening through which the solder dispenser extends, the opening being configured such as to allow the solder dispenser to move in at least one of the two orthogonal axes; and covering the opening with a slider cover which is attached to the solder dispenser and which is movable with the solder dispenser.