Investor Presentation Q3 2020

Production process - wafering Mounted Ingot Slurry Nozzle Wire Web- Wire Guide Rollers Silicon Wafer Lamp Heating Edge Rounding Wheel As Sawn Wafer Resistivity Vendor Identification Number - 5 Grinding- Chuck Process Gas Flow Susceptor 11 12 (siltronic perfect silicon solutions. Siltronic AG - Investor Presentation Q3 2020 October 29, 2020 9 Carrier Plate Polishing Pad Polishing Platen 76087354WA15.58163 Dopant Crystal Orientation Check-Characters Cleaning Bath - Etch Bath 7 10 9 Dryer Upper and Lower Lapping Plate 5 Multi Wire Slicing 6 Edge Rounding 7 Laser Marking 8 Lapping Silicon Wafer Lapping Carrier 80 9 Cleaning and Etching 10 Polishing 11 Epitaxy [optional] 12 Wafer 31 of 34

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