Recognize the Five Most Common Printed Circuit Board Failures



The tools or instruments that we use on a daily basis, printed circuit boards are found in virtually every tool. Right from computers and cell phones to television and portable speakers, we completely rely on PCBs to make our world work. However, sometimes these printed circuit boards do not work the way they should, due to material defects or environmental factors.

Even a well-designed PCB can have problems; let us have a look at the few common reasons for PCB failure.

Environmental Factors

As intended, the environment in which a printed circuit board is kept or manufactured can impact the ability of PCB to function. Since few materials are prone to expansion under thermal stress, excessive heat or humidity can cause boards to fail. In spite of cleanliness of a given environment, it can still lead PCB boards’ failure. At the time of manufacturing, hair, dust, insects and even fibres make their way into PCBs. However, it is vital to maintaining a clean environment which conducive to proper production, at the time of circuit board assembly.

Soldering Concerns

A PCB's solder is what maintains the connection between the component and its circuit. This result in making PCB a vital part of circuit board assembly. However, with too much moisture solder can sometimes become contaminated. As a result, it causes the solder to become conductive and cause short-circuiting. While this is often related to some of the environmental factors outlined above, it is imperative to watch out for soldering issues in particular during assembly.

Material Defects

A lot of things can conceivably go wrong at the time of` printed circuit board assembly. Amidst the most popular causes for board failure, a material defect is a chief. For instance, the PCB will not work the way it needs to, if a material used on the board has a fracture or delamination, or if materials are simply impure. During the PCB fabrication and assembly process, these defects can be an issue from the very start or can present themselves. Short circuits and crossed signals can occur when the layers are misaligned. Printing technique problems actually account for 70% of all surface assembly quality issues with boards.

Chemical Leakage

In certain PCB components, chemical fluids can be found, while most are removed during manufacturing. This medium is possible for traces of these fluids to be left behind or for leaks to occur. As a result, this leakage can eventually lead to short-circuiting or even corrosion, rendering a PCB unusable. To note, it is very vital to check for leakage and fluids left behind during the Printed Circuit Board inspection.

PCC specializes in rapid PCB assembly and system manufacturing services. We provide PCB Assembly Services for low and medium volume, high mix products, to varied customer markets globally. Our CCA, circuit card assembly lines are versatile for varied sizes and substrates types (FR4, Rogers, copper, duroid, ceramic, metalcore aluminium, CEM 1, and CEM 3). From multi-layered to flexible PCBs, we have expertise in each aspect of Printed Circuit Board Assembly & manufacturing services. We support simple, small boards to complex HDI boards in volume or prototypes.

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