PBGA is a package form, and its main distinguishing feature is the use of an array of solder balls to contact the substrate (such as PCB). This feature gives PBGA an advantage over other package types with different pin configurations (such as single-row, dual-in-line, and quad-row), that is, it can achieve higher pin density. The interconnection inside the PBGA package is realized by wire bonding or flip chip technology. The PBGA chip containing the integrated circuit is packaged in a plastic packaging material.
How many steps are required to remove the PBGA package from the PCB?
Tiffany Posted on August 20, 2020
PBGA device rework After the PBGA device is assembled on the PCB, if a defect is found, it should be reworked to remove the defective device and replace it with a working device. Before removing the device, the defective device should be heated until the solder joint is liquefied to facilitate the removal of the defective device from the circuit board.
The routine repair procedure is as follows
❶ Prepare the board
❷ Remove device
❸ Clean PCB pads
❹ Apply solder paste
❺ Device alignment and placement
❻ Fixing device
❼ Inspection
Conner Posted on August 20, 2020
Thank you!
Noel Posted on August 20, 2020
As a repairer, I tell you that the answers of the above are too complicated and cumbersome:
1. Apply flux around the parts to be disassembled, not too much.
2. Open the constant temperature air gun to 350 degrees. If the air nozzle is too small, you need to shake the air gun to heat it evenly.
3. Use tweezers to gently touch the IC when it slides and it can be picked up.
4. When it is hot, use Luotie to drag off the excess tin beads, remember to drag it flat, and avoid uneven tin spots.
5. Rinse with board washing water, and evenly apply a thin layer of flux, not too much to prevent drift during welding.
6. Put the new material on the foot position and direction. Turn on the air gun and blow it at 350 degrees.
7. When the material is blown, there is a sign of returning to its place. Use tweezers to gently touch the edge and slide it to return to its place. Be careful not to press the material.
