China's SMEE SSA800 lithography machine is the 28nm machine (which can do 7nm with multiple passes). What you didn't mention is that they also have another machine coming soon - SSA900. The SSA900 can do 22nm. It would be best for russia to skip 28nm and go straight to 22nm as this would allow for faster clock speeds and lower power consumption which would make creating decent laptop/desktop/server chips more viable. Unfortunately china has been refusing to sell lithography machines to russia according to youtube channel 'PRO Hi-Tech'. Russia would therefore need to get china to allow the sale of lithography machines. Another problem is creating wafers, russia can create wafers that aren't that pure, which is fine for solar panels but not for semiconductors. Russia needs to work on the technology to create semiconductor grade 200mm and 300mm wafers rather than rely on the importation of them as only a few companies in the world can do this. China is probably the only country willing to sell these wafers to russia now due to sanctions. If chinese relations become bad in the future russia might not be able to make any chips. Apparently a russian company called svetlana used to be able to do that but was bought out by an american company.
China's SMEE SSA800 lithography machine is the 28nm machine (which can do 7nm with multiple passes). What you didn't mention is that they also have another machine coming soon - SSA900. The SSA900 can do 22nm. It would be best for russia to skip 28nm and go straight to 22nm as this would allow for faster clock speeds and lower power consumption which would make creating decent laptop/desktop/server chips more viable. Unfortunately china has been refusing to sell lithography machines to russia according to youtube channel 'PRO Hi-Tech'. Russia would therefore need to get china to allow the sale of lithography machines. Another problem is creating wafers, russia can create wafers that aren't that pure, which is fine for solar panels but not for semiconductors. Russia needs to work on the technology to create semiconductor grade 200mm and 300mm wafers rather than rely on the importation of them as only a few companies in the world can do this. China is probably the only country willing to sell these wafers to russia now due to sanctions. If chinese relations become bad in the future russia might not be able to make any chips. Apparently a russian company called svetlana used to be able to do that but was bought out by an american company.