Exposure
scale: transistor level (~50-200nm)
Although usually hundreds of microprocessors are built on a single wafer this picture story will only focus on a small piece of a microprocessor from now on –on a transistor or parts thereof. A transistor acts as a switch controlling the flow of electrical current in a computer chip. Intel researchers have developed transistors so small that about 30 million of them could fit on the head of a pin.