Common problems of PCBA processing In the process of PCBA chip processing, the relative position between components and fasteners is a problem that requires special attention. When components are placed too close to fasteners, there can be a range of undesirable effects that can not only degrade the performance of the board, but also its reliability and longevity. Below, we will analyze these effects in detail from several aspects.
When a component is too close to a fastener, excessive mechanical stress may occur on the component due to the fastening effect of the fastener. This stress can cause deformation, cracking, or damage to the component, which can affect its proper operation. Especially for those components that are sensitive to mechanical stress, such as ceramic capacitors, crystal oscillators, etc., special attention needs to be paid to avoid getting too close to the fasteners.
Fasteners usually play the role of fixing and connecting in the circuit board, and when the circuit board is working, a certain amount of heat is generated due to the passage of current and the heating of components. When components are placed too close to fasteners, thermal stresses can occur between the components and fasteners due to differences in the coefficient of thermal expansion. This thermal stress can cause displacement, deformation, or cracking of components, which can affect the performance and reliability of the board.
Fasteners are usually made of metal, which has a certain conductivity and electromagnetic shielding effect. When components are too close to fasteners, they may experience electromagnetic interference from the fasteners, which can affect signal transmission. Especially for high-frequency circuits and sensitive circuits, the impact of electromagnetic interference is more significant, which can lead to problems such as signal distortion and transmission errors.
When components are too close to fasteners, repair and replacement work can be difficult. Due to the limited space and inconvenient operation, it can lead to damage to adjacent components or fasteners when repairing or replacing components, increasing repair costs and risks.
Components that are too close to fasteners can cause undesirable effects such as mechanical stress, thermal stress, electromagnetic interference, and difficulty in repairing and replacement. Therefore, in the process of PCBA chip processing, it is necessary to reasonably plan the position of components and fasteners to ensure that they maintain an appropriate distance between them to ensure the performance and reliability of the circuit board.