Search International and National Patent Collections

1. (WO2018099334) METHOD FOR CONTINUOUSLY DRAWING MONOCRYSTALLINE SILICON ROD BY SYNCHRONOUSLY CARRYING OUT CRYSTAL DRAWING, MATERIAL FEEDING, MATERIAL MELTING AND IMPURITY SEPARATION

Pub. No.:    WO/2018/099334    International Application No.:    PCT/CN2017/112963
Publication Date: Fri Jun 08 01:59:59 CEST 2018 International Filing Date: Sun Nov 26 00:59:59 CET 2017
IPC: C30B 29/06
C30B 15/00
Applicants: JIANGSU BAIR, PHOTOELECTRIC EQUIPMENT CO., LTD
江苏拜尔特光电设备有限公司
Inventors: YUAN, Yuping
袁玉平
YUAN, Jiabin
袁佳斌
Title: METHOD FOR CONTINUOUSLY DRAWING MONOCRYSTALLINE SILICON ROD BY SYNCHRONOUSLY CARRYING OUT CRYSTAL DRAWING, MATERIAL FEEDING, MATERIAL MELTING AND IMPURITY SEPARATION
Abstract:
The present invention relates to a method for continuously drawing a monocrystalline silicon rod by synchronously carrying out crystal drawing, material feeding, material melting and impurity separation. The method comprises: filling a material into a crucible; heating the material to melt the material; synchronously carrying out crystal drawing, material feeding, material melting and impurity separation; drawing, by means of a drawing head on a drawing device, the obtained material to form a rod having a specified length or a certain length; continuing to carry out crystal drawing, material feeding, material melting and impurity separation by means of another drawing head on the drawing device; and repeating the drawing until the quality of the silicon rod approaches a standard requirement due to an impurity impact, shutting down a furnace, and cleaning the furnace. By means of the present invention, crystal drawing costs can be greatly reduced, and the quality of the monocrystalline silicon rod can also be improved.