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PCB Assembly Design Guidelines

Views:33     Author:Site Editor     Publish Time: 2021-03-26      Origin:Site

Giant is the leading PCB assembly manufacturer in China, offers custom PCB assembly services. In the custom PCB assembly design process, the following guidelines help ensure efficient and easy assembly of circuit boards and other components.


Use standard and common components: Make sure that the components you plan to use are readily available. In addition, you should verify its continued production to avoid components that are about to expire because this will minimize future delays. Standard and readily available components reduce costs, improve quality and reduce inventory. Unique parts can lead to increased costs and are prone to poor quality.


Component spacing rules: You should design the circuit board and make sure to place the components carefully so that they are not too close or too far away from each other. No components should overlap each other. Too close a component to another component can cause problems that may need to be redesigned. To avoid spacing issues, you should make sure to leave enough space between the boundaries of each component when designing your footprint.


Component orientation and handling: The circuit board must be designed so that the component always maintains its own orientation during custom printed circuit board assembly. The orientation of the components may cause problems. For example, when polarized capacitors and diodes face different directions, problems can arise. The placement of the components determines whether the circuit board can be assembled, the soldering technique to be used, and the type of heat dissipation measures required. Moreover, because some components are placed too close, electrical noise will be generated, which will also affect the signal quality. For example, drilling holes should not be placed on the edge of the board, as they will cause the board to crack.


Strictly follow the data sheet to find the footprint: These suggestions help create accurate footprints and markings to prevent pad mismatches. Ignoring these suggestions will result in incorrect footprint, which may require a complete redesign and remanufacture of the circuit board.


Updated BOM: The bill of materials (BOM) is very important and there should be no problems as it will cause project delays. Whenever the design changes, the BOM should be checked. The addition or change of components should be updated with the correct component number, description and value.


Operating environment: PCB works in different environments under different conditions. For example, for certain boards to be used in environments with frequent vibration and movement, through-hole components are most suitable for installation because they are more securely connected than surface mount devices (SMD).


Heat dissipation: Certain components of the PCB will generate some heat, which needs to be dissipated in order for the board to perform its best function. Similarly, the welding process will generate some heat, which must be eliminated. You should design the circuit board in such a way that the components can quickly dissipate heat and can withstand the soldering process.


Track routing technology: Track routing should be designed according to some rules to ensure that it does not interfere with the placement of circuit boards or other components. For example, you should keep traces at least 0.025 inches from the edge. If the trace is not aligned with the pad or via, it may cause insufficient solder connection.


PCB assembly


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