Patent ID: 6902100

Claim:
In a method for making soldered bump connections between large-area SMD components with contact pads on the underside and circuit boards or wiring carriers, wherein solder required for bump connection is provided on at least one part of a pair of substantially parallel parts to be joined, a flux is used to activate the solder, and an electrical and mechanical connection is established by exposure to heat and melting of the solder-flux mixture while the pair of substantially parallel parts to be joined are transported through a soldering furnace, with a subsequent cooling phase, the improvement comprising the step of positioning the parts to be joined one over the other and forming a force of adhesion to hold the parts together; and the step of tilting the pair of adhering parts together at a predetermined tilting angle with respect to horizontal, at least during the melting of the solder-flux mixture, so that buoyant gas bubbles in solder-flux mixture bumps exit through the edge surfaces of the bumps and escape through the space between the substantially parallel parts, whereby bubble-free solder bump connections are formed between the two parts. 2 .The improvement specified in claim 1 , wherein adhesion is improved by applying a slight force.