Ultra-flat Ø4/100mm P{100} silicon wafer has higher specifications than the standard silicon wafers. For detailed information click on the link below. These wafers are preferred for demanding applications in micro-fabrication, as substrates for thin film research or biological substrates. Excellent ultra-flat surface for high resolution SEM imaging of particles due to the low background signal. The Si wafer is clean-room packed in a 4" wafer carrier tray for protection.