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Besides its headquarters in Jiangyin City in China’s coastal Jiangsu Province, the firm also has branches in Shanghai and Silicon Valley. The firm announced in January to invest $1.6 billion in Jiangyin City to build facilities that are expected to deliver 120,000 wafer-level packaged IC units and 20,000 3D multi-die integration packaging-based chipsets per month. In a statement, SJ Semiconductor said that it had signed investment agreements with all investors in September 2021. SJ Semiconductor was founded in August 2014 to offer 12-inch wafer bumping and testing service, an advanced wafer-level process technology essential to semiconductor packaging.
