Chinese semiconductor industry
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你觉得我的读汉字的能力那么高啊？
Is about the commercialization of EUV light sources.
Translated.
There are three main companies engaged in EUV in China as per this paragraph.
1. Shanghai Guang
2. Guangdong Institute of Intelligent machinery along with Huazhong university of science and technology
3. Tsinghua University
but they forgot to write the name of another very important institute.
4. Changchun Institute of Optics, Fine Mechanics and Physics is also deeply involved in EUV light source development.
its pleasure to see multiple institutions currently working on EUV light source.
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Surprised at the relative cheapness of the ssmb plant. Hope the part about its construction period being short is true.
I don't remember if SIOM or CIOMP that is involved in the first one but I know CIOMP is more involved in the development of the optics and projection objective lens than in the light source.
Loongson Zhongke: The first SoC integrating Loongson’s self-developed GPGPU is expected to be taped in Q1 next year
News On May 16, at the 2022 and 2023 first quarter performance and cash dividend briefing of Loongson Zhongke, Hu Weiwu, chairman of Loongson Zhongke, announced that the first integrated Loongson self-developed GPGPU (general-purpose graphics processor) A SoC chip is expected to be taped out in the first quarter of 2024.
"At present, the relevant IP research and development has been basically completed, and comprehensive verification is being carried out. On this basis, in the second half of 2024, the tape-out of a dedicated chip that takes into account graphics card and computing power acceleration functions will be completed." Hu Weiwu further said.
In addition, he also said that Godson will continue to increase the main frequency, but will not follow Intel's current technical route of sacrificing efficiency for frequency, and will strive to continue to reduce costs and power consumption at the 3GHz level. "By 2024, Loongson will tap out the first large and small core synergy chip. The next generation of Loongson 3A6000 is 3B6000, which will include four large four small eight cores and built-in self-developed GPGPU."
Fiber lasers have much shorter wavelengths ~1 um instead of 10.6 um for CO2 and are easier to build to high power.
One thing to consider is the IR absorbance spectrum of Sn.
It looks like a maximum in absorbance at ~1000 cm-1 (~10 um) and low absorbance at lower wavelengths (higher wavenumber). Interestingly, the Sn absorbance spectrum was the only one that is not normalized. If it is indeed normalized, then the absorbance is ~50% at 10.4 um. Assuming reflectance is 0 here.
I couldn't find a mid IR absorbance spectrum of either pure Sn nanoparticles or a reflection spectrum of Sn sheet. Here's a UV-VIS-NIR reflectance spectrum. I'll assume that there's only reflectance and absorbance, no transmission, in this case.
So we have at best ~20% absorbance at fiber wavelengths.
That is interesting.Fiber lasers have much shorter wavelengths ~1 um instead of 10.6 um for CO2 and are easier to build to high power.
One thing to consider is the IR absorbance spectrum of Sn.
It looks like a maximum in absorbance at ~1000 cm-1 (~10 um) and low absorbance at lower wavelengths (higher wavenumber). Interestingly, the Sn absorbance spectrum was the only one that is not normalized. If it is indeed normalized, then the absorbance is ~50% at 10.4 um. Assuming reflectance is 0 here.
I couldn't find a mid IR absorbance spectrum of either pure Sn nanoparticles or a reflection spectrum of Sn sheet. Here's a UV-VIS-NIR reflectance spectrum. I'll assume that there's only reflectance and absorbance, no transmission, in this case.
So we have at best ~20% absorbance at fiber wavelengths.
I already posted this but this is a bit more information in the research literature about the types of lasers that Huazhong had been developing.
Looks like a similar concept than Gigaphoton-Mitsubishi lasers.
that is a huge amount of cooling water and power draw. For 25 kW CO2 laser power, 400 kW is a incredible amount of power to draw into a single tool, and 375 kW of heat is an incredible amount of power dissipated.
Fiber lasers are also intrinsically easier to modulate than CO2 lasers. A fiber driven LPP-EUV source would be cabbagizing it.
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