US 12,421,618 B2
Anti-cracking suction device comprising outer cylinder, inner cylinder, suction tube, and first gap between inner and outer cylinders
Zhenyu Liu, Tianjin (CN); Jian Xu, Tianjin (CN); Zilong Zhao, Tianjin (CN); Long Xiang, Tianjin (CN); Jianping Wang, Tianjin (CN); and Jianping Gao, Tianjin (CN)
Assigned to TCL ZHONGHUAN RENEWABLE ENERGY TECHNOLOGY CO., LTD., Tianjin (CN)
Appl. No. 18/040,128
Filed by TCL ZHONGHUAN RENEWABLE ENERGY TECHNOLOGY CO., LTD, Tianjin (CN)
PCT Filed Nov. 25, 2022, PCT No. PCT/CN2022/134317
§ 371(c)(1), (2) Date Jan. 31, 2023,
PCT Pub. No. WO2023/165178, PCT Pub. Date Sep. 7, 2023.
Claims priority of application No. 202210196125.0 (CN), filed on Mar. 1, 2022.
Prior Publication US 2024/0247397 A1, Jul. 25, 2024
Int. Cl. C30B 35/00 (2006.01); C30B 15/00 (2006.01); C30B 29/06 (2006.01)
CPC C30B 15/00 (2013.01) [C30B 29/06 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An anti-cracking suction device for single crystal growth by a Czochralski method, comprising:
an outer cylinder;
an inner cylinder disposed in the outer cylinder;
a suction tube; wherein an upper portion of the suction tube extends into the inner cylinder from a bottom of the outer cylinder, and a lower portion of the suction tube is disposed outside the outer cylinder; and
a first gap provided between a bottom of the inner cylinder and the outer cylinder;
wherein the first gap is configured to cushion a thermal expansion of the bottom of the inner cylinder to reduce a stress at where the suction tube is connected with the inner cylinder, in a case that silicon liquid is sucked into the inner cylinder by the suction tube and is accumulated at the bottom of the inner cylinder; and
wherein the anti-cracking suction device further comprises a tray disposed in the first gap, a bottom of the tray is disposed against the bottom of the outer cylinder, the tray comprises an inner plate and an outer plate externally connected to the inner plate, a surface of the inner plate on a side away from the bottom of the outer cylinder is disposed against the bottom of the inner cylinder, a surface of the outer plate on a side away from the bottom of the outer cylinder is spaced apart from the bottom of the inner cylinder, and a thickness of the outer plate gradually increases along a direction toward the suction tube.