Liitinpinta
Liitinpinta is a Finnish term meaning the contact surface of a connector, the part that mates with another connector or socket. It constitutes the area where electric contact takes place and may be composed of metal or conductive polymers. The performance of the liitinpinta is critical in determining the reliability of a connection, as it must provide consistent electrical contact, maintain mechanical stability, and resist environmental factors such as corrosion and thermal expansion. Typical design parameters for a liitinpinta include its geometry, surface finish, and material selection. Common materials are copper, gold‑plated copper, and tin‑plated steel, each chosen for their conductivity and resistance to oxidation. Surface finish standards such as "bare", "electroless nickel", or "silver” plating are specified depending on the required current density and operational lifetime.
In manufacturing, the liitinpinta is produced by machining, electroplating, or additive manufacturing. Quality control is carried