SJ Semiconductor

SJ Semi is a MEOL (Middle-End of Line) foundry which implements front-end wafer manufacturing and quality systems to MEOL operations.

SJSemi is China's first 300mm MEOL (Middle-End-Of-Line) foundry specializing on advanced Bumping and wafer level packaging (WLP).

SJSemi was founded in August 2014 and is headquartered in Jiangyin, Jiangsu, China.


SJ Semiconductor started 28/14nm bumping for Smartphone AP chips in 2016, and is the first one to provide bumping for advanced DRAM and 12" power management chips in Mainland of China.


SJSemi thrives to provide a high quality one-stop advanced packaging service to local and international IC design houses for customer's local and global competitiveness.


SJSemi is backed by Walden CEL, CCB PE, Qualcomm, CMBI, Oriza Rivertown, CCIC Capital, Oriza Hua Capital, CCB Trust, Growth, Country Garden Venture, HTPE, SCGC, and others. The company closed its Series C with $300M in financing on Mar 16, 2022. This brings SJSemi's total funding to $630M to date. SJSemi was reported to be valued at over $1B from a financing raised in Oct 2021.



  • Year founded: 2014
  • Funding Info: $630M over 3 Rounds (Latest Funding Type: Series C)
  • Yearly Revenue: NA
  • Employee Size: 201-500
  • Business Valuation: Valued at over $1B as of Oct 08, 2021
  • City/Town: Jiangyin
  • State: Jiangsu
  • Country: China
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