Lifted Pad

A lifted pad is a copper landing pad that has separated from the laminate surface of the circuit board it was bonded to. Pads are thin copper features held to the fiberglass substrate by an adhesive bond and, where present, by the plated barrel of a through-hole. When that bond fails, the pad peels up, often taking its trace with it, which breaks the electrical connection at that point.

Common causes

The two dominant causes are excessive heat and mechanical stress. Holding a soldering iron or hot air on one spot too long degrades the adhesive that anchors the pad, so the copper releases. Prying at a component, yanking a wire, or applying force to a still-hot joint mechanically tears the pad free. Repeated rework on the same pad compounds the risk, since each heating cycle weakens the bond a little more. This is one reason gentle, even heating and adequate preheating matter so much during repair.

Repair and prevention

A lifted pad is repairable but unforgiving. If the pad is still attached to its trace, it can sometimes be carefully laid back down and re-secured. If it has torn off entirely, the connection must be rebuilt by scraping back the trace to expose clean copper and bridging to it with a fine jumper wire, then protecting the repair. Prevention is far easier than repair: use a preheater to reduce the heat any one spot needs, never apply force to a hot joint, and limit how many times a pad is reworked.

Because lifted pads come largely from over-heating, they are best avoided with a preheater and a disciplined reflow profile rather than fixed after the fact during hashboard work.