Nowadays, with the increasing use of electronic components, PCB is the most important part, which supports electrical circuits and provides electrical connections between them. PCB surface mount technology is becoming increasingly popular in PCB manufacturing, replacing traditional electronic assembly concepts for the production of thinner PCBs. Let us know the main features of Surface Mount Technology.
Step 1 – Printing
The solder pad at the end of the production line is used to print solder paste or adhesive onto the pads of the circuit board in preparation for the part of welding.
Step 2 – Adhesive dispensing
Glue dispensers are typically used to accurately inject paint, glue, and other liquids into precise positions on each product. It is used to apply glue to the PCB in a fixed position and to fix the components on the board when wave soldering is used.
Step 3 – Component placement
By applying the correct amount of solder paste, each component is removed from its packaging with a vacuum or gripper, inspected by a visual system and placed in the programmed position at high speed. In this way all the pieces are carefully placed on the board.
Step 4 – Automated Optical Inspection
After installing the components, it is important to verify that there were no errors and that all parts were installed correctly. This requires an AOI (Automated Optical Inspection) tool that can check component availability, type/quality, and polarity.
Step 5 – Reflow soldering
After all checks, the PCB is transferred to the reflow soldering machine, all electrical soldering connections are made between the components and the PCB, and the assembly is heated to the proper temperature. In this case, it is important to ensure the solder joint without damaging the component or assembly due to overheating.
Step 6 – Automated Optical Inspection
After soldering, it is important to check the joint again to make sure that it is free from defects and of the correct quality. Check for bad connections, missing connections, short circuits, and missing components.
Step 7 – Conformal coating
This step involves applying a thin polymer film that conforms to the PCB’s outline to protect the components, typically 25–250 micrometres thick, from moisture, dust, extreme temperatures and chemicals. In general, a suitable cover serves to protect the board.
Step 8 – Final inspection
One final test is now needed to confirm whether the PCB is working or not. The test will simulate the conditions under which the PCB will operate. While the tester monitors the electrical characteristics of the circuit board, simulated power and signals are run through the circuit board.
After completing all these processes, you can be sure that the product you receive is the best quality PCB assembly services. One manufacturer that can bring you great PCB assembly from India is East India Technologies, not only for Interface PCB technology but also for µBGA PCB assembly.
Call us on +91 9910337896 or you can email us at info@eitpl.com and Whatsapp & Text +91 9910337896
