: How are manufacturers able to manufacture really small cpu transistors?

Question

: How are manufacturers able to manufacture really small cpu transistors?

In: Technology

Answer 1

They use chemicals to build a thin layer, use light to burn it off in places, then more chemicals to actually modify the exposed parts of the chip (e.g. acids to create channels for conductors).

The advantage of using light is you can shine it through a bigger guide (that creates the necessary patterns) and reflect it down to a very small size.