US Patent 7367814 Electrical contacts used in an electrical connector

An electrical contact for electrically connecting an IC package and a circuit board includes a base portion, a resilient portion which includes a medial portion extending from the base portion and a connecting portion, a mating portion extending from the upper end of the connecting portion and having a mating point in the free end thereof, a tail portion extending from a lower end of the base portion. The connecting portion extends substantially parallel to the medial portion and distant to the medial portion, thus a distance in a horizontal direction between the medial portion and the resilient portion is formed and the elastic property of the electrical contact increases.