The Way Straight Permeation 89 - 92 purity ≥ 99.999 % density 2.33 g / cm Type P/P structure compactness Crystals < 100 > / < 111 > resistance （Ω?cm） 0.1~ 1 radial （%） P < 6 content(oxygen) ppm 5.0 - 7.8 * +- 0.5 Change（%）ppm < 5 Carbon (at ) ppm ≤ 2.0 Metals (at ) ppm ≤ 1.0 Surface Metals (at) ppm Cu /Cr / Fe / Ni ≤5.0 Al / Zn / Ka / Na / Ca≤2.0 Thickness (mm) SEMI or Request Length SEMI or Request width SEMI or Request Unknit TIR (mm)（mm） < 1.2 Part STIRmax(mm) < 0.3 Warp (mm) < 30 Grain (# per wafer) < 30( for size > 0.2 mm ) Memo:You can tell us any special question