Established in August, 2014, SJ Semiconductor Corp. (SJSemi) is the world’s first pure-play MEOL (Middle-End of Line) foundry which adapted and implemented front-end wafer manufacturing and quality systems to MEOL operations to support global customers. SJSemi's main business is providing bumping, Cu pillar, RDL and testing services for 12" wafers. The company also places heavy R&D emphasis on fan-out, TSV, interposer and 3D technologies.

SJSemi has received investments from SMIC, the China IC Industry Investment Fund, JCET and QUALCOMM Corp. The company’s registered capital is over US$330 million, and the expected total investment will be US$1.2 billion.

SJSemi has over 300 employees. The core team, both at home and abroad, consists of outstanding people, with rich experience in IC manufacturing management and MEOL silicon wafer bumping.

Thanks to strong support from suppliers and partners, and with the team’s hard work, clean room construction, equipment procurement and installation, process debugging, product verification, etc. were completed in 2015. Mass production started in 2016 for the world’s top customers, including the start of 14nm wafer bumping for Qualcomm. The company currently has capacity of 20,000 wafers/month and eventually targets 50,000 wafers/month.

SJSemi is located in the national high-tech Industrial Development Zone in Jiangyin , China; additional sales and customer support offices are located in Shanghai, China, and Silicon Valley, California (US).

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