About Hemlock Semiconductor Hemlock Semiconductor Operations (HSC) is a leading provider of hyper-pure polycrystalline silicon and other silicon-based products used in the manufacture of semiconductor devices, solar cells and modules. At HSC, we’re passionate about silicon-based technology and its unique potential to connect and energize the world we share. HSC’s polysilicon enables customers to produce high-tech electronics and solar energy, and our efficient manufacturing process delivers products with an ultra-low-carbon footprint. HSC began operations in 1961. More information can be found at: hscpoly.com | @hscpoly | LinkedIn | Facebook | YouTube