05/09/2026
How to Repair Damaged Solder Mask on an Android CPU | Prevent Solder Bridging During Reballing
When the solder mask on an Android CPU is damaged or peeled off, the exposed copper areas may prevent the solder balls from forming correctly. During CPU reballing, molten solder can spread between adjacent pads, causing solder bridges, short circuits, and reballing failure.
In this step-by-step phone repair tutorial, I will show you how to repair the damaged solder mask, restore the insulation around the affected pads, and prepare the CPU for clean and reliable reballing.
This technique is especially useful for phone repair technicians learning Android CPU repair, motherboard microsoldering, and CPU reballing.