Silicon Ingots
Optimum Solar silicon ingots are of highest quality materials and are provided in both Monocrystalline and Polycrystalline versions. Shapes are offered in square, pseudo-square and cylindrical. Our ingots are P type with Boron dopant. Our Monocrystalline 125mm pseudo-square measures carbon at <5x10e17 atoms/cm3. Our Monocrystalline 205mm cylindrical measures carbon at <=5x10e16 atoms/cm3. Our Polycrystalline 200mm square measures carbon at <5x10e17 atoms/cm3.
Specification for 125 x 125mm mono crystalline silicon ingots
Crystal Type |
Monocrystalline |
Dimension |
125 x 125mm ± 0.5mm Pseudo Square |
Conductivity Type |
P (Boron) |
Orientation |
<100 > +/- 1 degree |
Oxygen Concentration |
≤ 10E17 atoms/cm3 |
Carbon Concentration |
≤ 5E17 atoms/cm3 |
Resistivity |
0.5-3 ohms.cm 3-6 ohms.cm |
Minority Carrier Lifetime |
≥ 10us |
Crack and Pinhole |
No holes visible with naked eyea |
Square Angle |
90 +/- 0.5 degree |
Surface |
As cut and cleaned / No stains visible |
Contamination |
No dirt/oil stains, remains of soap/glue etc. |
| No. | Item |
Value | Remarks |
| 1 | Diameter | 205mm+/-3mm | |
| 2 | Condition | Unground | |
| 3 | Type | p-Type | |
| 4 | Dopant | Boron | |
| 5 | Resisitivity | 1-3 OhmCm or 3-6 OhmCm | |
| 6 | Orientation | 1-0-0 +/-3 degree | |
| 7 | Oxygen Content | <= 10.00 x 10e17 atoms / cm3 | measured at seed end |
| 8 | Carbon Content | <= 5.0 x 10e16 atoms / cm3 | measured at tail end |
| 9 | carrier life time | >= 15 micro sec | |
| 10 | Flat / notch | no Flat / no notch | |
| 11 | Crystal length | 100mm - 400mm | Average 300mm |
Electrical characteristics
Property |
Specification |
Crystallinity |
Multi-crystalline |
Donor type / Depoant |
P / Boron |
Oxygen concentration |
≤ 1 x 1016 atoms/cm3 |
Carbon concentration |
≤ 5 x 1017 atoms/cm3 |
Electrical properties
Property |
Specification |
Resistivity |
0.5 - 3.0 ohm-cm |
Lifetime* |
≥ 2 us |
Geometry
Geometry |
Square |
Geometry |
200 ± 30 m - Center Thickness |
Thickness (T) |
< 40 um |
Dimensions (WxW) |
156 mm x 156 mm ± 0.5 mm |
Saw marks |
≤ 15 um |
Surface Quality |
As cut, cleaned; no edge chips |
Bevel |
0.5 - 2mm |
Bow (warp) |
< 50 um |
Edge defect |
Length ≤ 1.5 mm, depth < 0.5 mm |
Packaging and labels
Property |
Specification |
Labels |
Part No., PO No., Lot No., No. of wafers, Dimension |
Packaging |
Industry standard packaging |