The solder resist used in this 94v0 Circuit Board And Pcb Assembly Service can be covered with solder resist in other non-weldable areas. The solder mask is essentially a polymer coating that prevents traces from soldering and can create shortcuts for nearby component leads. This 94v0 Circuit Board And Pcb Assembly Service is tested in different ways, such as bed nail test, rigid needle adapter, CT scan test, etc. The basis of all tests includes a computer program that will instruct the electrical test unit to apply a small voltage to each contact point and verify that a particular voltage is present at the appropriate contact point. This 94v0 Circuit Board And Pcb Assembly Service assembles the electronic components into the corresponding holes in the PCB when assembled. This can be done by a via structure or a surface mount structure. In the former method, the component leads are inserted into the holes drilled in the PCB. In the latter method, pads having legs similar to the PCB design are inserted and the ICs are placed or fixed on top of them. A common aspect of both methods is that the component leads are electrically and mechanically secured to the board with molten metal solder.