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Sioptics makes semiconductor and RF components for optical communication systems.
Sioptics develops silicon submounts and substrates for optical communications, data centers, laser applications, and biomedical fields. Founded in 2017 and based in Nantong, China, it raised an undisclosed amount of venture funding in May 2025 from Ysun Investment, Nantong Southern Wenfeng Investment, and returning investor Nantong Zhineng Private Equity Fund Management.
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