Microchips are made for program logic (microprocessor chips) and for computer memory (RAM chips).
Microchips are also made that include both logic and memory and for special purposes such as analog-to-digital conversion (DAC chips)
~3min

(Photo) Lithography
Lithography uses imaging techniques similar to photography to create tiny images on the silicon wafer. A thin layer sensitive to ultraviolet radiation known as photoresist is put on the wafer in a process known as spin coating.

How to print micro. ~3min