Patent ID: 7361028

Claim:
An electrical connector for connecting a chip module to a printed circuit board comprising: an insulative housing comprising a plurality of peripheral walls extending upwardly and interconnecting, and providing a contact receiving surface between said perimeter walls for supporting the chip module thereon, and a number of passageways therethrough; a number of receiving recess, each comprises a first recess and a second d recess adjacent to the first recess and both arranged on the sidewalls adjacent to the corners thereof inn a thickness direction; a pair of supporting members assembled on the peripheral wall; a number of terminals receiving in corresponding passageways of the housing; at least one detachable datum member arranged on the perimeter walls corresponding the numbers of datum members for providing a datum surface to the chip module received in the housing, which includes a base portion, an engaging portion extending upwardly from the base portion, a leading portion extending from the base portion substantially parallel to the engaging portion and disposed separately with the engaging portion.