PCB fault recognise ! By Imran

Chemical fluid leakage How To Recognise Five of the Most Common PCB FailuresThe presence of any chemical fluid that has leaked from a component can seriously damage the PCB and cause failure. Most chemicals are removed in the manufacturing process, but often trace elements are left behind. Inside the packaging of a component, leaks can happen, which cause rapid aging of the semiconductor or package. This chemical leakage can eventually cause shorts or become corrosive.

Issues with the soldering process Solders are the part that provides the necessary means of contact between the component and the circuit, without it the PCB would not work. There are a few solder issues that can cause failure, but the most common are flux contamination and poor processing conditions. Some flux residues can absorb moisture which can become conductive, causing short circuits. If the solder process is not properly set up and controlled, it can lead to open joints and contaminated solder Component barrier breakage The barrier of a component is there to protect the component from the outside environment and also to give a way for the component to connect to the circuit. If this barrier is broken, then the component will become exposed to environmental factors such as oxygen and humidity, which can cause the component to age and then fail. Physical problems with materials The materials used in a PCB can often encounter problems that will cause the board to fail. During the manufacturing stages, if a layer of the PCB is misaligned it will cause short circuits, open circuits and crossed signal lines. If there are psychical defects with the materials such as fractures, voids and delaminations they will seriously affect the performance of the PCB. Failure can also happen if the materials used are impure