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Definition: ZIF socket

(Zero Insertion Force socket) A type of socket designed for easy insertion of pin grid array (PGA) chips. The chip is easily dropped into the socket's holes, and a lever is pulled down to lock it in. Pulling the lever moves the top plate of the assembly, pushing the pins into their contacts. See PGA.

ZIF Socket
After insertion of the chip, the lever is pulled down and the pins are locked in.