太陽能多晶碇

Bricks are provided in a pre-cropped condition with minimum lengths of 100 mm for processing into wafers
with the following specifications. The bricks would be as-cut from the ingot, and with no grinding, polishing,
and chamfering.

Dimensional / Surtace Characteristics
Nominal Edge Length	156.8 mm
Minimum Cropped Length	100 mm
Maximum Cropped Length	250 mm
Surface Condition	As cut by Meyer Burger BS 805 band saw
Cracks	None visible or detected by IR scan
Inclusions	None visible or detected by IR scan

Electrical Specifications
Minimum Resistivity	0.5 Ω-cm (measured by Semilab WT-2000)
Maximum Resistivity	0.3 Ω-cm (measured by Semilab WT-2000)
Minimum Lifetime	2 μs (measured by Semilab WT-2000)
Type	p-type

Nominal Elemental Analysis
Primary Donors, Acceptors	Boron is nominally <1 ppmw; Phosphorus or Gallium levels adjusted to achieve targeted resistivity by type compensation.
Total Metals	< 1 ppmw
Aluminum	< 0.1 ppmw
Iron	< 0.5 ppmw
Oxygen	< 8x1017atoms/cc
Carbon	< 5x1017atoms/cc

Packaging

Bricks are packed in wooden crates, 25 bricks maximum per crate. Foam or cardboard liners are provided at bottom, top, and all surfaces of bricks.

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