Wholesale Customized 2-12 Inch P Type N Type Test Silicon Wafer. Customized Material & Specs: FSM supplies wafers meeting exact material, specifications, and optical coating needs. Multiple Diameter Options: Available in 150mm, 200mm, and 300mm sizes for various testing requirements. High Precision Polishing: Front and edge surfaces are polished with strict TTV, BOW, and WARP tolerances. Fast Inventory Delivery: Stock items ship within 5 working days for immediate project needs. Custom Production Lead Time: Customized orders delivered in 7 to 25 working days depending on quantity. Comprehensive Shipping: Global shipping via DHL, FedEx, TNT, UPS, EMS, and SF Express. Flexible Payment Terms: Accepts T/T, PayPal, and other standard international payment methods.