Without a doubt, a photolithography machine is extremely costly.
An advanced photolithography machine could retail at hundreds of millions of dollars.
However, what my sister, Ding Xiaoyou, mentioned earlier was a 25nm photolithography machine, a model that isn't exactly at the forefront of technology but rather a rather average one, which would consequently mean a less exorbitant price.
The most important factor is availability.
If you desire a 10nm, or even 7nm photolithography machine, chances are you wouldn't be able to locate one for sale.
Only Guoxing Technology Group currently owns a 7nm process photolithography machine domestically, while the Dingli Group oversees the production of 24nm, 12nm, and 10nm photolithography machines.
These are the results of breakthroughs made domestically in the past couple of years.
Presently, the globally-leading Almes Group is initiating the research and development of 5nm and even 3nm photolithography machines.