Drawing die plate for specially-shaped silicon core

Abstract

The invention discloses a drawing die plate for a specially-shaped silicon core, and relates to a die plate. The drawing die plate for a specially-shaped silicon core comprises a die plate (2) and a drawing groove, wherein the drawing groove is formed in the die plate, the drawing groove is any one of an I-shaped groove (1), a cross-shaped groove (4), a double-cross-shaped groove (6), a six-Chinese-character-shaped groove (8), an S-shaped groove (10) or a Z-shaped groove (12), and a crystal solution passage penetrating to the bottom of the die plate is formed in the bottom of the drawing groove (1); and the drawing die plate for a specially-shaped silicon core disclosed by the invention is used for realizing drawing for the specially-shaped silicon core by forming the specially-shaped drawing groove in the die plate, enabling the melted crystal solution to enter in the drawing groove, drawing out any one specially-shaped silicon core of an I-shaped silicon core, a cross-shaped silicon core, a double-cross-shaped silicon core, a six-Chinese-character-shaped silicon core, an S-shaped silicon core or a Z-shaped silicon core, and then pulling out the silicon core with the same shape via seed crystal with the same shape. The drawing die plate for the specially-shaped silicon core disclosed by the invention is wonderful in conception, simple in structure, and low in use cost; and the later-stage use effect of the specially-shaped silicon core is superior to the later-stage use effect of the existing cylindrical solid silicon core. The drawing die plate for the specially-shaped silicon core has certain market and application prospects.

Description

【Technical field】 [0001] The invention relates to a template, in particular the invention relates to a template for drawing a special-shaped silicon core. 【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 Raising the seed crystal, the molten raw material will follow the seed crystal to rise to form a new columnar crystal, which is the finished product of silicon core or other material crystals. [000...

AI Technical Summary

Problems solved by technology

[0008] At present, there are wire-cut square silicon cores on the market. Due to the wire-cutting process, the crystal is subjected to micro-shocks in diamond wire-cutting, so that there are many tiny cracks in the finished square silicon core that are difficult to detect with the naked eye. The instantaneous impact on the cracks is large, which greatly increases the amount of fractures or collapses during the growth of the silicon cores. In the light cases, the group of silicon cores cannot grow, and in severe cases, the furnace will be shut down. Then, large-diameter silicon cores are used for lap joints. The rapid growth of polycrystalline rods and the improvement of the strength of the silicon core itself have become a technical barrier that is difficult for those skilled in the art; however, how to increase the diameter of the silicon core or enlarge the expanded area of ​​the silicon core is a technical barrier for those skilled in the art. long-term appeal

[0009] The inventors have found through experiments that the use of special-shaped silicon cores can better achieve the same weight and effectively increase the growth area. However, there is no growth equipment and template for special-shaped silicon cores at present.

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