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Directional coagulation aid block as well as ingot furnace provided with same

A technology for coagulation-assisting and ingot casting furnaces, which is applied in self-solidification, crystal growth, single crystal growth, etc., and can solve problems such as unbalanced heat dissipation at the center of directional coagulation-assisting heat dissipation

Inactive Publication Date: 2014-02-05
YINGLI ENERGY CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to provide a directional coagulation aiding block and its ingot casting furnace to solve the problem in the prior art that the heat dissipation around the directional coagulation aiding block is unbalanced with the heat dissipation at the center

Method used

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  • Directional coagulation aid block as well as ingot furnace provided with same
  • Directional coagulation aid block as well as ingot furnace provided with same
  • Directional coagulation aid block as well as ingot furnace provided with same

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Embodiment Construction

[0025] Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0026] Figure 5 The direction of the arrow shown in indicates the direction of heat dissipation.

[0027] like image 3 As shown, according to the embodiment of the present invention, the directional clot-assisting body 10 includes a clot-assisting body 10 whose overall thickness is different, and the middle thickness of the clot-assisting body 10 is larger than the peripheral thickness. The thickness of the clot-assisting body 10 gradually decreases from the center to the periphery.

[0028] When polysilicon grows in the ingot furnace, heat conduction is mainly carried out by the coagulation-assisting body. Since the shape of the coagulation-assisting body 10 is changed, the overall thickness of...

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Abstract

The invention provides a directional coagulation aid block as well as an ingot furnace provided with the same. The directional coagulation aid block comprises a coagulation aid block body (10), wherein the thickness of the middle part of the coagulation aid block body (10) is greater than that of the rim. In the early and later growth periods of polycrystalline silicon, the heat conduction rate in the central part of the coagulation aid block body is consistent with that of the rim part, so that the transverse temperature gradient of the ingot furnace is reduced, and the smooth growth interface and the stable growth speed of the polycrystalline silicon are obtained.

Description

technical field [0001] The invention relates to the field of polysilicon production, in particular to a directional coagulation aiding block and an ingot casting furnace with the same. Background technique [0002] In the production of modern polycrystalline ingots, people generally adopt the method of controlling the directional solidification of polycrystalline silicon to grow silicon ingots. The key technology of this method is to reasonably control the temperature gradient of the polysilicon in the upper and lower parts, so as to obtain a good growth interface and a stable growth rate. In this way, silicon ingots of good quality can be cast. [0003] The directional coagulation aid is a very important part in the polycrystalline ingot casting furnace, and its material is graphite. Its first function is to support the crucible and silicon ingot; its second function is to conduct heat. The structural change of the directional coagulation aid will directly affect its hea...

Claims

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Application Information

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IPC IPC(8): C30B11/00C30B29/06
Inventor 夏新中刘磊
Owner YINGLI ENERGY CHINA
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