How Does PCB Assembly Work?
Feb 22, 2022
The assembly or manufacturing process of a printed circuit board (PCB) consists of many steps. The synergy of one step with the previous is very important in order to achieve a good PCB assembly (PCBA). In addition to this, the input should receive feedback from the output to make it easier to track and resolve any errors.
There are many steps involved in the PCB assembly process. If you want to get the best quality final product, you can refer to the following steps:
1. Add solder paste: This is the most initial stage of the assembly process. Add solder paste to the component pads wherever you want to solder and stick it in the right place with the help of the solder screen.
2. Placing the components: Once the solder paste has been added to the component pads, it is time to place the components. The PCB goes through a machine that places these components precisely on the pads. The tension provided by the solder paste holds the component in place.
3. Reflow Soldering: This step is used to permanently fix the components on the board. After placing the components on the board, the PCB goes passed through the reflow soldering conveyor belt. The controlled heat of the oven melts the solder paste added in the first step, permanently connecting the components.
4. Wave soldering: pass the PCB through wave soldering. This will create an electrical connection between the solder, the PCB pads and the component leads.
5. Cleaning: All welding processes have been completed. During the soldering process, a large amount of flux residue forms around the solder joint. We're going to do a foot-cut wash and clean the flux residue with deionized water and solvent.
6. Testing: PCB assembly is completed and inspection begins to test the location of components. Check whether the assembly is completely correct and whether there is a lack of material or solder,etc.