1 Scope

This standard stipulates the processing trade consumption standard for polycrystalline silicon (commodity number 28046190) as the main raw material to produce 4-inch, 5-inch single crystal silicon rods (Product No. 28061110) and single crystal silicon wafers (Product No. 38180011).

This standard applies to customs and foreign economic and trade departments for processing and trading of single-crystal silicon rods (commodity number 28046110) and monocrystalline silicon wafers (product number 38180011 And write-off management.

2 Definitions

This standard uses the following definitions:

The single-crystal silicon single-consumption consumption refers to the mass of polycrystalline silicon (kg) consumed per kilogram of monocrystalline silicon rods under normal production conditions. (Including net consumption and process losses)

The net consumption of monocrystalline silicon wafers processed by monocrystalline silicon rods refers to the mass (kg) of monocrystalline silicon rods per thousand crystal silicon wafers under normal production conditions.

Polycrystalline silicon processing single crystal silicon rod loss rate (%): In the normal processing of single crystal silicon rods, due to the production process but can not be materialized in the finished product of polysilicon consumption accounted for the percentage of polysilicon input.

Single crystal silicon rod processing single crystal silicon wafer loss rate (%): single crystal silicon wafer in the normal processing process, due to the production process but can not be materialized in the finished product of the single crystal silicon rod consumption accounted for monocrystalline silicon rod input The percentage of quantity.

3 single, loss standard

3.1 Raw material quality specifications

The raw material quality is no-clean material, and it meets the requirements of relevant domestic or international industry technical standards and the contract's determination of product quality.

3.2 Quality specifications of the finished product

Monocrystalline silicon rod quality specifications: The unit consumption standards apply to raw materials for the relevant GB/T12962-1996 national standards and contracts for the quality of monocrystalline silicon rod identification.

Single crystal silicon polishing film quality specifications: This unit consumption standard applies to the relevant GB/T12964-1996 national standards and contracts for the quality of single crystal silicon polishing sheet identified.

3.3 Single, Loss Standards

3.3.1 Polysilicon --- Monocrystalline silicon rod

3.3.2 Monocrystalline silicon rods - monocrystalline silicon polishing

Note: 1, can be used to make low-grade silicon products doped ramming materials, head and tail materials, should be taxed according to corner Branch.

2, the use of wire cutting machine, less loss.

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