Chinese semiconductor industry

Status
Not open for further replies.
FairAndUnbiased

FairAndUnbiased

Brigadier
Registered Member
ansy1968 said:
To the expert, why not develop the 18 inch? There are NO western equivalent and if successful develop together with SSMB we may see China leap frog the opposition.
Click to expand...
Vacuum chambers get MUCH more expensive as lateral dimensions increase since it takes very strong walls to withstand atmospheric pressure and shapes such as solid blocks or cylinders to best resist pressure. Remember than 15 psi of atmosphere all around is a crushing 1.5 tons on a simple sphere with 4 inch radius.

The material has to be relatively expensive stainless steel or aluminum too, processed with expensive methods.

The wafers also get much heavier and thicker, as well as becoming absolutely impossible to move by hand and being 100% reliant on robotics.
 
D

do3jack

New Member
Registered Member
Chip sanctions have a very big impact on China. This video explains it closer to the real situation. The video is in Chinese.
 
FairAndUnbiased

FairAndUnbiased

Brigadier
Registered Member
pbd456 said:
Suppose the SSMB goes smoothly, what else are needed to manufacture advanced node with SSMB? There is no way the Western suppliers will supply any of the tools and chemicals.
Click to expand...
EUV resist. this is quite difficult as a EUV resist has to have high contrast (large chemical difference between exposed and unexposed areas), high resolution (only exposed regions change chemical property, unexposed regions do not change so patterns can be kept as precise as possible), high sensitivity (minimum EUV photon exposure; important because EUV production is like ~7% power efficient) and compatible with vacuum.

While EUV has high photon interaction cross section with all materials, some are higher than others. However, just because it interacts, doesn't mean it interacts in a chemically useful way i.e. bond breaking. You don't want useless absorption processes like heating up or photoelectron formation. Too bad most of the elements that absorb the most EUV aren't exactly known for complex chemistry.

nanomaterials-10-01593-g002.jpg
 
P

pbd456

Junior Member
Registered Member
FairAndUnbiased said:
EUV resist. this is quite difficult as a EUV resist has to have high contrast (large chemical difference between exposed and unexposed areas), high resolution (only exposed regions change chemical property, unexposed regions do not change so patterns can be kept as precise as possible), high sensitivity (minimum EUV photon exposure; important because EUV production is like ~7% power efficient) and compatible with vacuum.

While EUV has high photon interaction cross section with all materials, some are higher than others. However, just because it interacts, doesn't mean it interacts in a chemically useful way i.e. bond breaking. You don't want useless absorption processes like heating up or photoelectron formation. Too bad most of the elements that absorb the most EUV aren't exactly known for complex chemistry.

nanomaterials-10-01593-g002.jpg
Click to expand...
I read that it is being developed using Shanghai synchrotron right? Which company is working on it and have any progress been reported?
 
coolgod

coolgod

Colonel
Registered Member
FairAndUnbiased said:
you mean 45 nm?

US doesn't care about Chinese superconductoring chips, and neither does China, because superconducting quantum chips are seen as a dead end.

Please, Log in or Register to view URLs content!
Click to expand...
gelgoog said:
People have been working on superconducting chips since the 1960s with the results you can see. i.e. no one uses them.
Please, Log in or Register to view URLs content!
Click to expand...
Not that I'm a fan of superconducting qubits, but I wouldn't rule them out yet, they have some advantages due to their easily manipulatable microwave frequencies.

Superconducting nanowire single-photon detector (SNSPD) is actually very important in quantum optics/communications/computing (think qubit readout), or physics in general in the future. I'm pretty sure there are groups in Shanghai who research and can make them, but the market for SNSPD is still pretty small.


Please, Log in or Register to view URLs content!

Please, Log in or Register to view URLs content!

ASML Faces Tighter Dutch Restrictions on Servicing Chip Equipment in China​

  • ASML will be limited in repairing restricted machines in China
  • China’s production capabilities and capacity to be affected
Please, Log in or Register to view URLs content!
, the leading provider of chipmaking equipment, is facing tighter restrictions on its ability to work with Chinese customers, a further escalation in the technology clash between Washington and Beijing.

Dutch export control rules will forbid ASML from maintaining, repairing and providing spare parts for controlled equipment without government approval, people familiar with the matter said. Those restrictions are related to new regulations the government published in June that prohibit ASML from shipping some so-called immersion deep ultraviolet lithography machines, its second-most capable machinery, to China without a license
Please, Log in or Register to view URLs content!
.
Click to expand...
In addition to the Dutch controls, the US is expected to bar ASML from selling even older DUV lithography gear to about half a dozen of Chinese plants without approval from Washington, said the people, asking not to be named because the rules aren’t yet public. Among the China plants the Biden administration is targeting is one operated by
Please, Log in or Register to view URLs content!
, one of the country’s leading chip companies.
Click to expand...

I think ASML can say goodbye to Ga and Ge imports.
 
Last edited:
G

gelgoog

Lieutenant General
Registered Member
If they ban ASML immersion DUV tool sales altogether it will have a major impact on the SMIC expansion. SMIC is building 3 huge fabs all designed to make 28nm chips. Alternative Chinese tools are not ready yet.
Someone needs to light a fire under the ass of SMEE and however else is working on the immersion litho machine.

If the West does this, China should ban exports of neon gas.
 
Status
Not open for further replies.
Top