Patent ID: 8328068

Claim:
A transfer device for receiving and transferring a solder ball arrangement, the device comprising: a discharge container having an annular peripheral wall coupled to a base wall formed of a wire mesh exhibiting a mesh size smaller than diameter of solder balls, wherein the discharge container includes a photoelectric barrier device provided with a transmitter and a receiver, each arranged on opposing locations in the peripheral wall; a transfer substrate that interacts with the discharge container in order to obtain a flat solder ball arrangement, the transfer substrate having a hole pattern for receiving the solder ball arrangement; a first ultrasound device coupled to the peripheral wall of the discharge container for subjecting said discharge container to ultrasound vibrations; a solder ball reservoir operatively coupled to the discharge container for supplying solder balls to the discharge container; a metering device coupled to the solder ball reservoir and coupling the solder ball reservoir to the discharge container, the metering device comprising an outlet nozzle and a second ultrasound device coupled to the outlet nozzle to subject the outlet nozzle to ultrasound vibrations, wherein the metering device interacts with said photoelectric barrier device, which defines a filling level, h, of the discharge container.