US Patent 7435103 Ball grid array socket having a positioning device

An electrical connector (2) comprises an insulative housing (4) and a number of metal plates (3). The insulative housing (4) has a bottom floor (45) and a number of side walls (46) extending perpendicularly from the bottom floor (45). The bottom floor (45) and the side walls (46) define a cavity (44) and an opening opposite the bottom floor (45) so that a chipset (8) could be loaded into the cavity (44) through the opening. Each of the metal plates (3) comprises a base portion (30) fixing the metal plate (3) to the insulative housing (4), a spring arm (31) extending from the base portion (30) and a pressing pad (32) connecting the spring arm (31) for flexibly abutting a side of the chipset (8).