The CPU is also one of the most expensive components on the motherboard. It is a very delicate device and sensitive to ESD, thus it should be handled with care. The processor itself is a flat plate of silicon made up of millions of transistors etched on to the silicon plate to form a huge computer logic circuit.
A ceramic cover is placed over the micro-circuit to protect it and to conduct heat away to the heat sink. This protective ceramic covering will have print information of the processor type, speed, and other details.