Multi Solar Wafer Specification
156 X 156
1. Scope
The Wafer is a square multicrystalline silicon p-type substrate for solar cell applied; From Metallization solar grade silicon.
2. Wafer Specification
2-1 Properties
|
Item
|
Specification
|
Unit
|
|
Conductive Type, Dopant
|
P-Type, Boron
|
N/A(*5)
|
|
Resistivity
|
I：0.5~3
|
Ohm-cm(*4)
|
|
Brick lifetime
|
≥2
|
µ s
|
2-2 Physical Dimensions
|
Item
|
Specification
|
Unit
|
|
Dimension
|
156±0.5 X 156±0.5
|
mm
|
|
Bevel edge length
|
0.5 - 2
|
mm(*1)
|
|
Right Angel
|
90 ± 0.3
|
Degree
|
|
Thickness
|
220 ± 30
240 ± 30
|
µ m(*2)
|
|
TTV
|
≤30
|
μm
|
2-3 Appearance
|
Item
|
Specification
|
Unit
|
|
Chip
|
The Chip length must less than 3 mm or depth must less than 0.5mm
|
mm
|
|
Saw mark
|
≤20
|
μm
|
|
Micro-grain
|
1cm less than 10 grain, and the area sm aller than 2 X 2 cm²
|
Cm/cm²
|
|
Cracks
|
None allowed
|
N/A
|
|
Pin holes
|
None allowed
|
N/A
|
|
Contamination
|
No chemical or organic residue, staining , or extraneous material permitted on wafer surface
|
N/A
|
