Patent ID: 8381962
Filing Date: 2013-02-26
Classification: B23K

Abstract:
1. An apparatus for forming solder structures, said apparatus comprising: a substrate that is a supporting material on which a circuit is formed and has a plurality of wettable pads in recessed regions defining volumes; a flexible unitary mask having a plurality of through holes; a substrate carrier configured to receive the substrate; a movable base plate positioned on the substrate carrier between the substrate carrier and the substrate; an alignment stage configured to align said through holes with the wettable pads; an injection molded solder head configured to directly inject molten solder through said through holes of said flexible unitary mask into the volumes with the wettable pads, such that said through holes and the volumes with the wettable pads are filled with solder; a cooling stage which allows the solder to solidify, whereby the solder forms the plurality of solder structures, adhered to the wettable pads; and a take-up member configured to peel said flexible unitary mask from the substrate.