US Patent 7950929 Electrical terminal and board-to-board connector with the electrical terminal

An electrical terminal is adapted for being mounted in a connector. The electrical terminal includes an elastic portion of a substantially U-shape which includes a fastening arm and a contact arm spaced from the fastening arm, and a soldering tail connected with a free end of the fastening arm. The contact arm defines a contact area back to the fastening arm for electrically contacting an external mating terminal. The contact area includes a plurality of concave fillisters and contact ribs parallel one another to be alternately arranged and each extended at an incline to an inserting direction of the external mating terminal so that ensures a firm contact between the electrical terminal and the mating terminal.