The W1197-Si 200 mm dia × 9.96 mm thick silicon wafer is a high-precision monocrystalline silicon blank engineered for demanding optical, semiconductor, and advanced engineering applications. With a tight diameter tolerance, fine-ground edge finish, excellent surface roughness, and superior optical characteristics including a 180 mm clear aperture and low reflective wavefront error, this wafer delivers the dimensional stability and surface quality required for precision fabrication, metrology, and research workflows.