This is not for a scanner. It’s probably going to be used mainly for metrology. The goal of a scanner is exposure. This specific technique is to get control on beam profile to get more favorable scatter for imaging.
News on China's scientific and technological development.
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I would say the goal of a scanner is both exposure and resolution. Do you have any thoughts on the feasibility of using photon sieves in an EUV scanner in a way analogous to water in an immersion DUV system - keeping their differences as a diffractive and refractive optics in mind - as an optical stage between the last mirror and the mask to improve resolution by increasing NA?
Resolution is not directly the same thing as scatter profile. Depending on what you’re trying to see there isn’t a one size fits all scatter profile for everything.
But wrt the feasibility of photon sieves as a focusing element for an EUV scanner you have to look at light loss as a primary constraint. You also don’t get high NA just by slapping on one of these to your optics assembly. The NA is determined firstly by your aperture size relative to your focusing distance. There’s just a lot more that goes into how these optics are designed than slap on an extra part for results.
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I posted here of MIIT's focus areas for 2024 in terms of future development
no mention of stuff it has already conquered. This is all about what's next
Thin film PV thus far has been a failure. Its main advantage is lower energy costs to manufacture the panels. But you get panels with low energy efficiency. In some cases they also require rare metals. Personally I think the best choice in that regard is something like Amorphous-Silicon (a-Si) panels. At least those don't require rare metals to make. The main advantage is that the panels are flexible. But this isn't a big deal really. Research on quantum dot PV has a lot more promise. As if that technology is developed it would allow higher efficiency solar cells.
Much more important for China, I think, would be trying to get ballistic conductors and latest generation superconductors in mass market use. This would make long distance energy transmission much cheaper. And this is important for China as it gets to use more renewables. As the main sites for renewable power plants are quite far from the large urban centers. Ballistic conductors would basically be to the power grid what fiber optics was for the telecoms network.
Much more important for China, I think, would be trying to get ballistic conductors and latest generation superconductors in mass market use. This would make long distance energy transmission much cheaper. And this is important for China as it gets to use more renewables. As the main sites for renewable power plants are quite far from the large urban centers. Ballistic conductors would basically be to the power grid what fiber optics was for the telecoms network.
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its incredible to see, exactly 10 years ago Turbofan engine used to be the center of attention in mainland China and hot topic among Chinese netzines..
Gas turbine technology , Machine tools , mature semiconductor supply chain and General aviation. these industries are well and truly conquered by China ..
Long March is continue towards cutting edge technology ..
I recall "useful lifespan" is ~5 years, maybe less. The only people that these devices are currently feasible for are the quadriplegics and amputees.
Big reforms taking place in academia / academic environment.
We predicted as much with the technocratic shift in the government i.e. many appointees with PhDs or science industry background.
We predicted as much with the technocratic shift in the government i.e. many appointees with PhDs or science industry background.
By 15 February, China’s universities and clarify why the papers have been retracted. According to a Nature analysis of English-language journals, more than 17,000 retraction notices for papers published by co-authors in China have been issued in that period. This is “the first time we’ve seen such a national operation on retraction investigations”, says library and information scientist Xiaotian Chen. It’s not clear what the government will do with the retraction reports. Proponents suggest that the reporting process in itself, as well as regular reviews, could help to curb misconduct.
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This is why it's important to keep track of the number of papers published in reputable journals, rather than the number of papers published in total. The article mentions Hindawi, a publisher that issued 9,600 retractions in 2023. As far as I know, none of Hindawi's journals are included in the Nature Index.
This is a step in the right direction and I applaud it.