题目内容
Wave soldering is a process by which large printed circuit boards can be soldered quickly and reliably during PCB assembly.
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The wave soldering process gains its name from the fact that the process passes the printed circuit boards to be soldered over a wave of solder (consists of a heated tank of solder). Wave soldering is usually used in PCB assembly for through hole mounted components.
Reflow soldering is the most common method of attaching surface mount technology ( SMT ) components to a printed circuit board. The goal of the reflow process is to heat and melt the solder, without overheating and damaging the electrical components.
Instead automatic optical inspection is a far more viable solution. Machines are available that are able to inspect boards and detect poor joints, misplaced components, and under some instances the wrong component.
In-circuit test is to do the physical measurements (i.e. voltage, frequency) , then functional test is to check if the PCB does what it had been designed for.
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