In what kinds of problems is optical metrology absolutely necessary? Is it irreplaceable in some domains?
The Jim Reaper.
Chinese semiconductor industry
- Thread starter Hendrik_2000
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It's way faster than anything electron based, because it works in air and can measure the whole wafer at once. Electron based methods are vacuum only and are small area imaging. But they are the gold standard as it is model free.
X-ray is used for spectroscopy like in XRF or XPS for wafer chemical mapping. It's not used for CD until recently. There is a recent method (within 5 years) to apply small angle X-ray scattering (SAXS) usually used for crystallography to 3D NAND CD.
But there's guys smarter than me working on this stuff.
It sounds to me like a good problem to sprinkle some AI on. The AI can learn the model from ground truth data provided by electron microscopy and other reliable methods.
It's actually easier to tell YMTC's production status than other firms，because YMTC products are available on consumer market. As long as that availability doesn't change，they are likely okay
Wait，YMTC's 232 layer products are selling right now，and there is no sign of running out of stock. Doesn't that mean YMTC is able to sustain 232 layer production at the moment？
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I assume they can keep 232 layer production going, but any new capacity they bring online will be 128 layers. Or until whenever AMEC develops something that can do 232 layers.
YMTC's revenue was said to be 5% of global revenue according to that link. I think @hvpc's table show them to be less than that (especially in Q4). Either way, once fab 2 is ramped up, they can probably reach 10% of global revenue. Fully capable of replacing Micron in the Chinese market. It was really dumb of Biden admin to make memory chips into a national security issue.
We can see with AMEC's progress, they are far more focused on developing tools for 7 to 14nm process than for memory chips.
Think of it like detecting stealth planes with indirect signal patterns.
In order to ensure the security of the key information infrastructure supply chain, prevent network security risks caused by hidden product problems, and maintain national security, according to the "National Security Law of the People's Republic of China" and "The People's Republic of China
According to the Cyber Security Law of the Republic of China, the Cyber Security Review Office conducts a cyber security review of products sold by Micron in China in accordance with the Cyber Security Review Measures.
According to the Cyber Security Law of the Republic of China, the Cyber Security Review Office conducts a cyber security review of products sold by Micron in China in accordance with the Cyber Security Review Measures.
About damn time. Long overdue. They should do the same thing to Qualcomm.
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