Components soldering method to PCB - is a low temp. process using current pulses and can be easily automated

摘要

The method of soldering electronic components, rotatably integrated circuits, avoids the need for elevated temps. and can be incorporated into a rapid automated process. It is applicable to components having flat terminal blades which lie on top of printed board tracks or pads. A tool (7) having a cavity (8) of approximately the same form as the component has an internal tube connected to a suction system in order to hold the component. Side arms of the tool press the component leads (3) onto the printed circuit pads (5). A current-pulse generator (13) has probe connectors planted on the tracks leading to the terminals to be soldered. When the correct mechanical pressure between the tool head and component lead is achieved, a current pulse of intensity and duration sufficient to solder the joint between leads and pads is applied by the generator. The tool lead can be either grounded with respect to the generator probes or, alternatively, the probes can be grounded and the tool lead can be the source of current pulses.