Patent ID: 7556518

Claim:
A bum-in socket for receiving an IC package comprising: a base defining an opening for loading the IC package therein; a loading plate mounted within the base, the loading plate having a seating surface with a plurality of holes defined therein; a contact socket located under the loading plate; and a plurality of contacts received in the contact socket, each contact having one end extending into the hole in the seating surface of the loading plate for contact with a solder ball of the IC package; wherein the seating surface comprises at least one lower plane and at least one upper plane, and at least said upper plane is formed with said holes; wherein the loading plate has a plurality of lower planes and a plurality of upper planes alternately arranged with each other thereon, wherein one of the lower planes is located in a central region of said loading plate; wherein the central lower plane has an opening formed therein for inspecting the loading of the IC package.