Patent ID: 8784117

Claim:
An electrical connector for connecting a package and a mother board comprising: an insulating sheet defining a top surface confronting with the package and a lower surface confronting with the mother board, the insulating sheet having a plurality of through holes through the top surface and the lower surface thereof and arranged in a matrix; and a plurality of contacts pressed in the corresponding through holes from the top surface of the insulating sheet, each contact comprising a main plate, a pair of first contacting arms from opposite edges of the main plates for contacting with the package and a pair of second contacting arm from another opposite edges of the main plate for contacting with the board; wherein the through holes are of a cross shape and have four corners, each of the corners defines an abrupt slope at an upper portion thereof and a recessed groove below the an abrupt slope, the main plates are guided to straddle over the abrupt slopes and fall in the recessed grooves from moving toward the top surface.