silicon Wafer

silicon Wafer 156*156
smooth and clean supface,free from cracks,marks,any spots,and obvious cutting breaking lines.

Polycrystalline silicon wafers

Conduction type: P type
Wafer dimension: 156*156+/-0.5mm
Thickness: 200μm+/-10%
Resistivity: 0.26ohm.cm
Lifetime: ≥ 2 μs
Damagement ≤20μm
TTV: ≤30μm
Squareness: 90+/-0.3
Erythroculter angle : ≤40μm
Oxygen Concent < 1*10 E18Atoms/ cm 3
Carbon Concent < 5*10E 17 Atoms / cm 3
Surface is clean ,broken edge ,broken angle≤1mm,and there are most two in per wafer. free from visible stains, no visible cracks ,no holes,no visible knife-edge