Patent ID: 6548790
Filing Date: 2003-04-15
Classification: B23K,H05K

Abstract:
An apparatus primarily intended for manufacturing SSD-PCBs by inductively heating solder powder, comprising:(a) a bare-PCB comprising a plurality of soldering pads on a side facing upward, said bare-PCB spread with a solder powder pile over said side facing upward, and (b) a workholder where said bare-PCB is firmly attached, and (c) shaker means for shaking said workholder during operation wherefrom said solder powder pile is shaken in order to induce random impingement of solder particles on said side facing upward, and (d) an E.I.H. device comprising a flat matrix inductor, a radio frequency generator, a switching device and a programmable controller, said flat matrix inductor comprising a plurality of individual inductor cells arranged in a matrix fashion, said flat matrix inductor placed facing down on top of said bare-PCB with a predetermined gap, said E.I.H. device only generates electromagnetic energy via each and every individual inductor cell that is aligned with a soldering pad thereby inducing localized heating into said plurality of soldering pads for a predetermined time sufficient to cause localized melting of said solder powder pile consequently forming a layer of SSD controllable in thickness over each and every soldering pad forming part of said plurality of soldering pads whereby in operation the dielectric substrate forming said bare-PCB, its interconnecting traces and solder mask all remain relatively cold.