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"ZIF" is an anconym for "Zero Insersion Force".
For any processor, or other integrated circuit designed for insertion into a socket, the force required to insert or remove it is proportional to the number of pins on the chip. As each pin needs a secure connection to it's socket, the force required on modern processors, having close to a thousand pins; to insert into or remove from a socket reliably and without damage; would be extremely high and would likely cause physical damage if done by hand.
A ZIF socket utilizes a clamping mechanism whereby the socket contacts can be opened using a lever. This allows a processor, with hundreds of fragile pins, to simply be dropped into the socket with no force. Then, the ZIF socket is clamped or "locked" using the lever which firmly clamps all pins tightly.
In this manner, a ZIF socket makes difficult and potentially damaging insertion or removal of a processor or other integrated circuit, a simple, easy, and safe task.
What else can I help you with?
What has a lever that is used to lift the processor up and out of the socket?
zero insertion force sockets (see page 178 in A+ Guide to Managing and Maintaining Your PC) "PGA, SPGA, and LGA sockets are all square or nearly square. So that even force is applied when inserting the processor in the socket, all current processor sockets have a lever on the side of the socket. These sockets are called zero insertion force (ZIF) sockets, and this lever is used to lift the processor up and out of the socket. Push the lever down and the processor moves into its pin or land connectors with equal force over the entire housing."
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