Fabrication
Gold Fingers
In plain English
The gold-plated stripes along a board's edge that plug into a slot, tough enough to be inserted thousands of times — like the metal contacts on a memory card.
The technical version
Gold fingers are the gold-plated edge contacts on a board that mate with an edge connector or tester socket. They use hard electroplated gold over nickel, typically around 30 microinches, to withstand thousands of insertion cycles. They are common on card-edge connectors and ATE loadboards.