Electrical connector

An electrical connector for attaching an IC package to a circuit member comprising:

• a base defining a bottom surface and a plurality of side walls;
• a cover mounted on the base;
• a plurality of terminals received in the base;
• a plurality of solder balls connecting to the terminals and extending below the bottom surface of the base for soldering to the circuit member;
• wherein the base defines a plurality of continuous uninterrupted groove upwardly recessed from the bottom surface thereof and extending from one side wall toward another opposed side wall along most of the bottom surface extent between such opposed sidewalls, and at least one end of each of the grooves is communicated with exterior space to facilitate heat ventilation wherein the housing includes a lever slidably moving the cover relative to the base, wherein the side wall of the base define a plurality of openings, wherein the two side walls of the base defines a plurality of recesses so as to take off the IC package from the cover conveniently.