A soldering iron is a hand tool used in soldering. It supplies heat to melt solder so that it can flow into the joint between two workpieces.
Electric soldering iron
A gas-fired soldering iron
Historical soldering irons (front) and torches (back)
Electric soldering iron for electronic work
Printed circuit board manufacturing is the process of manufacturing bare printed circuit boards and populating them with electronic components. It includes all the processes to produce the full assemb
PCBs in process of having copper pattern plated (note the blue dry film resist)
A board designed in 1967; the sweeping curves in the traces are evidence of freehand design using adhesive tape
PCB copper electroplating line in the process of pattern plating copper
Cut through a SDRAM-module, a multi-layer PCB (BGA mounted). Note the via, visible as a bright copper-colored band running between the top and bottom layers of the board.