Elastomer used in the socket, as a contactor between the IC package and the circuit board, is a low resistance (less than 0.05ohms) connector. The elastomer consists of a fine pitch matrix of gold plated wires in a soft insulating sheet of silicone rubber. The sockets have a precision design, which guides the IC to the exact position for connection of each ball and uses an aluminum heat sink to provide compressive force.

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