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1. 发明授权

US09553221B2 Electromagnetic casting method and apparatus for polycrystalline silicon 有权
标题翻译：多晶硅电磁铸造方法及装置
公开(公告)号：US09553221B2
公开(公告)日：2017-01-24
申请号：US13845507
申请日：2013-03-18
申请人： SUMCO CORPORATION
发明人： Koichi Maegawa , Tomohiro Onizuka , Mitsuo Yoshihara
IPC分类号： H01L31/028 , C30B29/06 , C30B13/20 , C30B15/08 , C30B28/06 , B22D11/00 , B22D11/041 , B22D11/108 , B22D11/11 , B22D11/12 , B22D11/20 , C30B28/04
CPC分类号： H01L31/028 , B22D11/001 , B22D11/041 , B22D11/108 , B22D11/11 , B22D11/1213 , B22D11/20 , C30B13/20 , C30B15/08 , C30B28/04 , C30B28/06 , C30B29/06
摘要： Disclosed is an electromagnetic casting method of polycrystalline silicon which is characterized in that polycrystalline silicon is continuously cast by charging silicon raw materials into a bottomless cold mold, melting the silicon raw materials using electromagnetic induction heating, and pulling down the molten silicon to solidify it, wherein the depth of solid-liquid interface before the start of the final solidification process is decreased by reducing a pull down rate of ingot in a final phase of steady-state casting. By adopting the method, the region of precipitation of foreign substances in the finally solidified portion of ingot can be reduced and cracking generation can be prevented upon production of a polycrystalline silicon as a substrate material for a solar cell.
摘要翻译：本发明公开了一种多晶硅的电磁铸造方法，其特征在于，通过将硅原料装入无底冷模中，通过电磁感应加热熔化硅原料，并将熔融硅固化而使多晶硅连续铸造，其中在最终凝固过程开始之前的固 - 液界面的深度通过在稳态铸造的最后阶段中通过降低锭的下拉速率来降低。通过采用该方法，可以减少在锭的最终凝固部分中异物沉淀的区域，并且在生产作为太阳能电池的基板材料的多晶硅时可以防止产生裂纹。

2. 发明授权

US09080814B2 Continuous casting method of silicon ingot 有权
标题翻译：硅锭连铸法
公开(公告)号：US09080814B2
公开(公告)日：2015-07-14
申请号：US13793115
申请日：2013-03-11
申请人： SUMCO CORPORATION
发明人： Mitsuo Yoshihara , Koichi Maegawa , Shinya Fukushima
IPC分类号： F27B14/10 , F27B14/06 , C30B11/00 , F27B14/08 , F27D7/06 , C30B29/06
CPC分类号： F27B14/10 , C30B11/001 , C30B11/002 , C30B29/06 , F27B14/061 , F27B14/0806 , F27D7/06
摘要： Provided is a continuous casting method of a silicon ingot for continuously casting the silicon ingot by arranging, inside an induction coil, a bottomless cold crucible having a part along an axial direction that is circumferentially divided into a plurality of strip elements, forming molten silicon inside the cold crucible through electromagnetic induction heating by the induction coil, and solidifying the molten silicon while pulling it down from the cold crucible, wherein as the cold crucible, used is a cold crucible with Ni—B alloy plating on a portion in the inner surface thereof that faces the outer side surface of the molten silicon and the outer surface of the silicon ingot. The method can reduce the damage to the inner surface of the cold crucible, in addition to the contamination of cast ingots with impurities.
摘要翻译：提供一种用于连续铸造硅锭的连续铸造方法，其通过在感应线圈内布置具有沿着轴向的一部分的无底冷坩埚，所述无底冷坩埚沿圆周方向分隔成多个条状元件，在内部形成熔融硅冷坩埚通过感应线圈的电磁感应加热，并将熔融硅从冷坩埚中拉下来固化，其中，作为冷坩埚，使用的是在内表面的一部分上具有Ni-B合金电镀的冷坩埚其面对熔融硅的外侧表面和硅锭的外表面。除了具有杂质的铸锭的污染之外，该方法还可以减少冷坩埚的内表面的损坏。

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