Method for pulling silicon core by crystal crushed material and device for applying same

Abstract

The invention discloses a method for pulling a silicon core by a crystal crushed material and a device for applying the same. The outside of a crucible (8) is provided with a heating jacket (9), a distance from 3 cm to 10 cm is left between the crucible (8) and the heating jacket (9), the lower part of the crucible (8) is provided with a crucible support (10), and the upper part of the internal surface of the crucible (8) is provided with a guiding mould support (6). The structure of a guiding mould used for cooling seed crystal is as follows: a guiding mould (5) is placed on the guiding mould support (6) and is in a hollow-cavity structure, the arbitrary part of the upper part of the hollow cavity of the guiding mould (5) is provided with a cooling water port A (3) and a cooling water port B (4), and the middle of the guiding mould is provided with a crystal (2) pulling opening. The method for pulling a silicon core by a crystal crushed material uses the simple structure of the crucible, the heating jacket and the guiding mould to enable the crystal crushed material to be reused, saves the reducing process and the enterprise cost, and reduces the turn-over period of the crystal crushed material.

Description

Technical field: [0001] The invention belongs to a method for drawing silicon cores from polysilicon, and relates to a method for drawing silicon cores from polysilicon or other crystal scraps, in particular to a device for drawing silicon cores from polysilicon or other crystal scraps. Background technique: [0002] At present, the amount of silicon cores used in China is very large; the existing silicon cores are produced by zone melting, and high-frequency coils and seed chucks are used in the process to complete the drawing process. The working principle is as follows: When passing high-frequency current to the high-frequency coil, high-frequency induction heating causes the high-frequency coil to generate current to generate magnetic force lines on the raw material rod, and the upper end of the heated raw material rod forms a melting zone, and then inserts the seed crystal into the melting zone, slowly When the seed crystal is lifted, the molten raw material will follow...

AI Technical Summary

Problems solved by technology

[0003] Through observation, I found that the treatment of the remaining materials in the process of making silicon cores and the silicon cores that were accidentally broken is very cumbersome. Generally, the above-mentioned waste materials will be recycled and then returned to the manufacturer for reprocessing. There are also relatively powerful manufacturers through The Czochralski furnace reduces the waste materials, and then draws the reduced raw material rods again. This method not only increases the cost of the silicon core drawing party, but also the time for reuse will be in the links or processes of logistics, transfer, and reduction. middle extension

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