Solder preforms are stamped out of solder foils. Their shape is tailored to match the geometry of the solder joint. Preforms have the advantage that their solder volume can be precisely matched and optimized to the solder joints to be made. When working with costly solder paste, i.e. a paste with a high silver content, excessive consumption can be avoided and the process is made commercially viable. The complexity of the solder process is also reduced, is becomes easier to control and safer. The cost of placing and positioning the preforms should not be neglected.