So the chips are made of transistors. An entire electrical circuit with many transistors, wires, and other electrical devices are built into a single square of silicon. The transistors are arranged in layers on a chip so that millions of transistors can be placed on one chip. This procedure of building a chip was developed by Jack Kilby and Robert Noyce in 1958, and they have been improved over the years since then. No, because the chips are so small, hundreds of them are made on a single silicon wafer at one time, and then the wafer is sliced up into individual chips.
Companies can turn out several million integrated chips every few seconds.