Common Challenges In The PCB Component Assembly Process
The PCB (printed circuit board) is the integral part of electronic products. Assembling of this PCB is a crucial task. It can either be for short or long term requirements and it needs to satisfy the requirements properly. Many PCB manufacturers have their factories based in Dubai. All these companies have their own quality control and fulfillment departments.
Many times, customers get attracted to some brand names while buying products from the market but its not so easy to find out the real brand. So, if you are the owner of a business that is interested in promoting your product then we recommend you to think about establishing a relationship with a branded company which deals in producing printed circuit boards. If you cherished this article so you would like to get more info regarding 2 layer pcb fabrication cost in mumbai kindly visit our web page. A good PCB manufacturer will always be ready to help you in providing your business with a PCB that is worth its weight in gold. So, here are some of the key features you should look for while selecting a printed circuit board manufacturer from across the world:
- Tombstoning: A PCB component assembly process is known for its unique characteristics. In this process, the components are heated to extreme temperatures and then are fitted onto the circuit boards. This method requires high concentration of heat energy. So, the components are not easily wear out. If the components are not perfectly leveled then they will not touch the solder when soldering. Thus, tombstoning reduces the risk of defects.
- Reflow: Another unique feature of pcb assembly is the reflow process. If the solder is not completely soldered down, it can easily go back to the original state by undergoing reflow process. The process entails heating the pcb until it reaches the glass-like state. Once the solder melts, it goes back to its solid state. This gives a great visual appearance to the product during the inspection stage.
- Unbalanced Torque: As mentioned above, pcb manufacturers make use of high-performance solid silicone oils to ensure that the components are fitted and aligned correctly. However, during the process, sometimes the torque can get unbalanced due to excess heat. This unbalanced torque may also occur due to the improper application of the heat. To overcome such problems, manufacturers make use of liquid propylene glycol solution. This improves the performance of the component by making the molten solder to adhere to the pcb evenly.
- Copper Shielding: Another problem that could affect the PCB assembly process is poor electrical contact. This can either be caused by poor transfer of voltage or due to poor connection between the solder bars and the pcb. To overcome this problem, manufacturers make use of copper shields. These shields protect the pcb from the external contact and prevent it from getting damaged. They are available in various thicknesses to suit the need of different types of products. A PCB with a copper shield has the potential to save up to 80% of the energy used for reflow soldering.
- Poor Water Feeding: Another issue that could interfere with the proper functioning of the product during the reflow process is poor water feeding. This happens when there is an irregularity in the water flow. For instance, if the water feed pipe is not connected to the heater, the solder paste may melt and spill. If the assembly is placed under the hot plate, there is a possibility that the flux may also leak inside the assembly. The presence of excess solder and water could cause the formation of uneven tension, which will reduce the performance of the product during the assembly.
Some of the other issues that can hamper the functioning of the product during the reflow process include uneven melting, overheating, and shrinking. In order to combat these issues, the pcb manufacturing company should have a number of tools in place like the tombstoning tool, the primer feeder, and the heat resistant paste stencils. It is very important to keep all these tools in one fold so that they can be accessed easily. If any of the tools are inaccessible, it might mean that the manufacturer is suffering from a manufacturing constraint and the possibility of having to restart the production process at the earliest is high.