Chinese semiconductor industry

Scientists improve near-field optical proximity correction via spatial modulation​

Researchers led by Prof. Wei Yayi from the University of Chinese Academy of Sciences (UCAS) have improved the final pattern fidelity in near-field nanolithography, a breakthrough in understanding the near-field diffraction limit of an evanescent-field-based patterning system.
The results, published in Microsystems & Nanoengineering, is the first to investigate the physical origin of the near-field optical proximity effect (OPE), and the theoretical calculations and simulation results indicate that the evanescent-field-induced rapid loss of high-k information is one of the main optical contributors to the near-field OPE.

As the feature size is continuously scaled down, the pattern profile generated by a near-field lithography exhibits very poor pattern quality due to the near-field OPE, far below the minimum requirement for nanofabrication. Therefore, it is essential to minimize the near-field OPE in order to achieve the highest pattern resolution and fidelity possible with the plasmonic lithography process.

In this study, the researchers investigated the physical concepts behind the near-field OPE in a maskless plasmonic lithography, and proposed a near-field optical proximity correction (OPC) method via the spatial modulation of nanopatterns to improve the final pattern quality.

Boltzmann said:

Phytium is owned by the cetc, it is the first in line in any bidding. Their chips have already been used to make at least one exascale supercomputer with smic's 14nm node so I think capacity probably isn't a super pressing issue.
keg.cs.tsinghua.edu.cn

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Formatting was screwed up for some reason, the source for the exascale machine is
BaGuaLu: Targeting Brain Scale Pretrained Models with over 37 Million Cores

Boltzmann said:

Phytium is owned by the cetc, it is the first in line in any bidding.

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I don't think these big SOEs have any "priority" in this. A bitcoin mining chip can get SMIC's 7nm slot before others

tonyget said:

I don't think these big SOEs have any "priority" in this. A bitcoin mining chip can get SMIC's 7nm slot before others

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That's because a bitcoin mining chip is simpler, and thus more tolerant of higher defect rates, and thus better suited for risk and trial production. You want to train up your process on easier more disposable designs before you shift over to producing more complex and important designs.

latenlazy said:

That's because a bitcoin mining chip is simpler, and thus more tolerant of higher defect rates, and thus better suited for risk and trial production. You want to train up your process on easier more disposable designs before you shift over to producing more complex and important designs.

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Are there any confirmed SMIC 7nm chips aside from the bitcoin mining chip?

zbb said:

Are there any confirmed SMIC 7nm chips aside from the bitcoin mining chip?

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It is entirely possible that SMIC has made zero progress with 7 nm production since 2021 and are stuck forever to the end of time.

zbb said:

Are there any confirmed SMIC 7nm chips aside from the bitcoin mining chip?

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Unfortunately no, China is hiding all its advancements right now. Even the Bitcoin mining 7nm was hidden from public. China is obviously doing this because they want to get production capacity high enough that if there are more bans it won't hurt. But that takes time and leaves us all in the dark. That's why I'm here as there are leakers here like Havok.

What is rumored however is that SMIC has been making Huawei Kunpeng chips for servers. Somehow Huawei has been able to keep building out it's cloud services without access to server CPUs. Which is strange, unless SMIC has been printing them for Huawei.

staplez said:

Unfortunately no, China is hiding all its advancements right now. Even the Bitcoin mining 7nm was hidden from public. China is obviously doing this because they want to get production capacity high enough that if there are more bans it won't hurt. But that takes time and leaves us all in the dark. That's why I'm here as there are leakers here like Havok.

What is rumored however is that SMIC has been making Huawei Kunpeng chips for servers. Somehow Huawei has been able to keep building out it's cloud services without access to server CPUs. Which is strange, unless SMIC has been printing them for Huawei.

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To add to this

The list of things I'm aware of that are currently rumored.

SMEE 28nm Lithography machine in mass production.

Biren GPU in mass production.

Huawei 7nm phone chipset

Huawei Kunpeng server CPU

EUV prototype

CETC Lithography machine

That's all I'm aware of, anyone else?

staplez said:

To add to this

The list of things I'm aware of that are currently rumored.

SMEE 28nm Lithography machine in mass production.

Biren GPU in mass production.

Huawei 7nm phone chipset

Huawei Kunpeng server CPU

EUV prototype

CETC Lithography machine

That's all I'm aware of, anyone else?

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Biren GPU in mass production is not a rumor. It's on their website, lol.

the rumor wasn't a 7nm phone chipset, but rather a 12/14nm chipset.

Someone from Hisilicon said the Ascend project is finished. Implication is that Kunpeng was already done before this, because their partners are producing PCs with Kunpeng CPUs and it's a continuous thing. Check my post on Baode and Kunpeng here

btw, 3 years ago, they opened up a production line in Sichuan that produces 200k PCs and 150k server computers a year

so HW has to supply quite a few kunpeng chips

No one said anything about EUV prototype, it's a EUV light source

tphuang said:

Biren GPU in mass production is not a rumor. It's on their website, lol.

the rumor wasn't a 7nm phone chipset, but rather a 12/14nm chipset.

Someone from Hisilicon said the Ascend project is finished. Implication is that Kunpeng was already done before this, because their partners are producing PCs with Kunpeng CPUs and it's a continuous thing. Check my post on Baode and Kunpeng here

Chinese semiconductor industry

https://library.techinsights.com/reverse-engineering/blog-viewer/578823?utm_source=Webpage%20CTA&utm_content=A%20Quiet%20Response%20to%20Trade%20Restrictions%3F%203D%20IC%20Breakthrough%20in%20Chinese%20Bitcoin%20Miner.%20&utm_campaign=2023%20-%20Q1%20-%20Logic-%20Disruptive%20Event%20-%20Jasmine...

www.sinodefenceforum.com

No one said anything about EUV prototype, it's a EUV light source

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Thanks for the corrections. With so many things happening all at once it's good to clarify every once in a while. For what it's worth, things may not be great in the world, but China's advancements at least can bring us all a little joy.