We need a lithography machine.
The main role of 5g RF front-end chip is to achieve signal transmission and reception. To connect wirelessly, you must have an RF front-end chip. It includes RF switch, RF low noise amplifier, RF power amplifier, diplexer, RF filter and other chip modules. Since 5g RF chips are chips, they must use lithography machines, and at present, only lithography machines can carve large-scale silicon transistor circuits.