What are the requirements for components on the circuit board?
Published time: 2020-02-20 12:43:41
The correct installation layout of components on the PCB is an extremely important part to reduce soldering defects. Component layout should be as far away from areas with large deflection and high stress areas as possible, and the distribution should be as uniform as possible. Especially for components with large heat capacity, try to avoid using oversized PCBs to prevent warping. Poor layout design will directly affect the productivity and reliability of the PCB. Let's understand what are the requirements for component placement.
Components close to the edge of the printed circuit board are not conducive to automated assembly, mechanical stress concentration, easy damage during the turnaround process, and metallized holes and pads are easily pulled. Components are not allowed to be placed within 5mm from the process edge, clamping edge or the edge of the printed circuit board.
When placing components near the edge of the printed circuit board, the long side of the component should be parallel to the edge of the printed circuit board. The chip ceramic capacitors near the edge of the panel, screws and sockets are prone to failure after high temperature aging or after a period of use.
There should be a certain amount of maintenance space around large components to facilitate the operation of the heating head of the repair equipment. When laying components near the edges of large components, the long side of the component should be parallel to the edge of the component.
Key and valuable components, such as near high-concentration areas such as connectors, mounting holes, slots, cuts in cutouts, corners, and fastenings, can easily cause solder joint fatigue or solder joint breakage.Tag: components