Constant-component crystal growth control system and method for lifting single-crystal furnace

A control system and growth control technology, which is applied in the field of crystal constant component growth control system of pulling single crystal furnace, can solve problems such as uneven crystal distribution, achieve the effect of solving axial uneven distribution and improving influence
CN104911697AActive Publication Date: 2015-09-16CHINA ELECTRONICS TECH GRP NO 26 RES INST +1
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Patent Information

Authority / Receiving Office
CN ¡ China
Current Assignee / Owner
CHINA ELECTRONICS TECH GRP NO 26 RES INST
Publication Date
2015-09-16

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Abstract

The invention discloses a constant-component crystal growth control system and method for a lifting single-crystal furnace. The constant-component crystal growth control system and method for the lifting single-crystal furnace cooperatively control a crystal growth speed and a raw material supplement speed, the weight of the grown crystal is consistent with that of the supplemented raw material, and the crystal crystallization liquid surface height is always constant; analysis and theoretical calculation prove that components of the supplemented raw material are consistent with components of the grown crystal, and accordingly liquid components in a crucible are not changed. The constant-component crystal growth control system and method for the lifting single-crystal furnace effectively solve the problem of uneven crystal distribution along the axial direction due to crystal segregation phenomenon and greatly reduce the influence of the downward crystallization interface move due to continuous crystal growth on the crystal growth interface shape.
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Description

technical field

[0001] The invention relates to crystal growth, specifically refers to a crystal constant component growth control system and method in a pulling single crystal furnace. The invention can grow crystals with constant component and high uniformity, and belongs to the technical field of crystal growth. Background technique

[0002] At present, the pulling single crystal furnace is the most widely used crystal growth equipment, and the pulling method is also a crystal growth method with the longest research history, the most mature technology and the widest range of applications. However, the existence of macroscopic defects in crystals still affects the quality and utilization of crystals, so the significance of studying macroscopic defects in crystals is very important.

[0003] When growing crystals by the pulling method, multi-component materials are melted and crystallized to synthesize a new type of material. Since the dissolved concentrations of each solut...

Claims

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