An electrical connector assembly (100) includes an insulative housing (2), a micro chip (1) arranged on the insulative housing, a PCB (3) located below the insulative housing, a number of contacts (5) received in the insulative housing and a locking element (4) interconnecting the insulative housing onto the PCB. The contacts extend beyond an upper surface of the insulative housing and solder with the micro chip. The contacts extend below a lower surface of the insulative housing and contact with the PCB.