Chinese semiconductor thread II

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tokenanalyst

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Frequency-domain enhanced spatial multi-position moiré fringe alignment method​

Abstract​

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Most existing lithography alignment methods adopt multi-wavelength light sources and off-axis illumination technologies. In practical lithography alignment scenarios, alignment marks are generally located in the wafer scribe lane, and their positions vary with the chip layout. Nevertheless, conventional off-axis illumination schemes are incapable of fixed-point illumination for alignment marks and coordinated regulation of light source wavelength and illumination incident angle. To address the above limitations, this paper proposes a frequency-domain enhanced spatial multi-position moiré fringe alignment method. The proposed method enables the modulation of illumination wavelength and incident angle at any position within the field of view of 7430 × 8830 μm, with an operating wavelength ranging from 532 nm to 635 nm. The measurement repeatability 3 value is less than 1 nm at arbitrary detection positions.

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The Longqing Aerospace & Shanghai Jiao Tong University School of Integrated Circuits Joint Laboratory for Satellite Internet was officially established.​


Longqing Aerospace and the School of Integrated Circuits at Shanghai Jiao Tong University (SJTU) officially established the "Satellite Internet Joint Laboratory." The collaboration aims to integrate SJTU's academic research strengths with Longqing Aerospace's engineering and industrial application capabilities to advance China's satellite internet sector. Key leaders and experts from both institutions attended the unveiling ceremony to outline the lab's strategic planning, research directions, and talent training mechanisms.

The joint laboratory will focus on four primary areas of research and development. First, it will tackle core technologies for low-orbit satellite phased array antennas and mass-producible communication terminals for various applications. Second, it will explore onboard intelligent computing and satellite payload processing using Longqing's AI computing chips to evolve satellite internet from simple connectivity to "intelligent services." Third, the lab will develop high-reliability systems for onboard network interconnection, security, and storage. Finally, it will emphasize industry-education integration to cultivate interdisciplinary talents at the intersection of commercial aerospace and integrated circuits.

This initiative serves as a strategic move to address national demands and support Shanghai's commercial aerospace ecosystem. Representatives from both SJTU and Longqing Aerospace highlighted the strong synergy of the partnership, noting that combining university-level theoretical research with enterprise-level product definition and engineering implementation will accelerate the transition of scientific achievements into practical, industrialized products. This collaborative model is expected to significantly enhance the independent controllability and efficiency of core satellite internet technologies.

Looking ahead, the laboratory aims to build a comprehensive platform for technological innovation, talent cultivation, and achievement transformation, ensuring that research remains verifiable, transferable, and industrializable. Longqing Aerospace, a high-tech enterprise specializing in the deep integration of AI and commercial aerospace, will leverage this partnership to drive the evolution of satellite networks. Ultimately, the joint lab will contribute to Shanghai's goal of becoming a global commercial aerospace hub and support the high-quality, self-reliant development of the national aerospace industry.​

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Wrought

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Thinktank piece which argues the US should stop digging itself deeper with export controls.

The fundamental reason for this posture is that China’s regulatory authorities no longer think U.S. chip companies are reliable business partners. As a result, there will be no going back to earlier levels of interdependence, where U.S. companies dominated the Chinese chip market. Even if Chinese companies wanted to train and operate their artificial intelligence (AI) models on U.S. chips, China’s authorities would not let them.

The global AI and chip marketplaces, however, are still up for grabs, and U.S. companies still welcome and hold an advantage there. The U.S. and China might not have really reached a detente or stalemate on the chips issue, however, and there are policy mistakes the U.S. could make in a misguided effort to keep China in a technological box. Such miscalculations would hurt the ability of U.S. companies to maintain their lead with international buyers. Chief among these potential policy errors are
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to third countries in the hopes of keeping Chinese companies from evading U.S. controls, measures to
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and applications from the U.S. and other markets, and restrictions on access to
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by U.S. and allied companies. Each of these ideas is under active consideration among U.S. policymakers and commentators, and each would accomplish little except isolating U.S. companies from the global AI and chip marketplace.
Click to expand...

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