Multicrystalline Wafer 156mm x 156mm

 
Product name: Multicrystalline Wafer 156mm x 156mm
Research & Development Targets: Multicrystalline Wafer Thickness
Currently: 180 μm
In 5 Years: 130-160μm
Planned Capacity:2010: 3.0GW; 2011: 3.0GW
Growth Method: Directional solidification
Conductivity Type: P type
Dopant: Boron
Resistivity: 1~3Ω.cm
Oxygen Content: 1×10 18 atom/cm 3
Carbon Content: 4×10 17 atom/cm 3
Structural Characteristics:
Side: 156.0mm ± 0.5mm
Corner diagonal: 1.5mm ± 0.5mm
Corner Angle: 45°±10°
Thickness: 180±20μm; 200±20μm
Surface: No stain or splash on surface
Mechanical Characteristics:
TTV: ≤40μm
Bow: ≤70μm
Surface: No defect
Saw Mark: ≤15μm

Polycrystalline silicon wafer is a form of elemental silicon. When molten elemental silicon solidifies under supercooled conditions, the silicon atoms are arranged in a diamond lattice form into a plurality of crystal nuclei. If the crystal nuclei grow into crystal grains with different crystal orientations, the crystal grains are combined and crystallized into polycrystalline silicon. .

Utilization value: From the current development process of international solar cells, it can be seen that the development trend is monocrystalline silicon, polycrystalline silicon, ribbon silicon, thin film materials (including microcrystalline silicon-based films, compound-based films and dye films).

Polycrystalline silicon wafers are classified into electronic grades and solar grades. Let's talk about solar energy. It is used as a raw material for the solar energy industry chain. It is used for ingot casting or pulling single crystal silicon rods. It is cut into silicon wafers and produced into solar panels. It is solar panels on satellites and space stations. For the construction of solar power plants, there are few solar power stations in China. Although he is environmentally friendly, he is very costly and expensive. He often needs government subsidies. Europe is the most used solar energy in the world, and it is also the main sales of solar panels in China. direction. Electronic grade polysilicon is used to produce semiconductor materials, mainly used in electronic equipment, and is used on chips.