Views:21 Author:Site Editor Publish Time: 2015-03-05 Origin:Site
PCB failure is frustrating. It's costly, inconvenient and can negatively affect your brand. PCB are sensitive things though, and failures can be caused by a number of things – from the weather to age. Here are the top five reasons that PCB fail, and how you can reduce the risk of failure.
1. Environmental factors
PCB in damp or particularly hostile environments are prone to these types of failure because, as temperatures change, the PCB can expand and contract and boards may become warped. With all this movement it’s easy for soldered joints to become damaged, leading to board failure. This sort of issue is most likely to be seen when a component’s barrier has been broken and atmospheric particles such as dirt, dust and moisture get into the component, or circuit board.
FS Technology adopted vacuum package and put a small pack of desiccant for ready PCB to avoid moisture invade inner layer, and prevent effectively corrosion of air to the bonding pad when stocking the PCB. Before assembly process, FS Technology strictly baking their PCB to exhaust of moisture and can conformal coating base on PCBA environments needs.
2. Poorly manufactured components.
One of the most common reasons for failure is a poorly manufactured PCB. Issues such as incorrect soldering temperatures, misalignment of the bare board & components and dry joints all indicatives of a poorly manufactured PCB.
FS Technology has been working on providing good PCB with a good reputation. We have standing in the PCB industrial since 2004 and growing stronger and stronger, that means our PCB are valuable, and we are collecting more and more good reputation from our clients. Besides, FS Technology have been cooperated with stable components suppliers and establish perfect supply chain.
3. Burnt components
PCBs can get pretty warm, and in doing so components work outside their standard operating temperatures. The amount of heat that a component can take is finite and depends largely on its size and structure. Make sure that when designing your PCB your components have sufficient space around them to allow air to circulate around any heat sinks, and they will be working within their operational capability.
4. Atmospheric conditions on manufacturing
The conditions of the room in which PCB are assembled can also impact a PCB performance. If PCB get dusty and dirty, or come into contact with hair or bugs, these can all cause faults. Ensure that the labs in which PCB are assembled are kept clean and dry for quality circuit board printing and assembly.
FS factory have dust-free plant for PCB assembly process. Every staff have to dress anti-static clothing, hygiene cap, ware shoes cover and go through air shower before they go into the SMT room.
5. Acid traps and other design flaws
Sometimes the reason for a failure actually lies within the initial design. Where acute angles are used in a circuit, acid can get caught up during the etching process. Enchant in an area for longer than intended can begin to eat away at the circuit making it defective. It's best to avoid 90 degree angles in circuit board design where possible.