Production technology for controlling oxygen donor single crystal

Abstract

The invention relates to a production technology for controlling oxygen donor single crystal. The production technology comprises the following steps: stretching the neck, shouldering, turning the shoulder, equalizing diameter, ending and controlling oxygen. The production technology is characterized in that in all steps, the liquid level inside a crucible (1) in a single crystal furnace is always kept at a high pan level; the high pan level is the distance, namely 15-25mm, between the liquid level inside the crucible (1) and the bottom of a diversion screen (2). The production technology has the beneficial effects that the time of the single crystal in an oxygen donor production space is reduced by control on the rotating speed of seed crystal in the production step, control on the rotating speed of the crucible, control on the ascending speed of the crucible, control on the flow of an inert gas, and improvement of an inner thermal insulation layer of the single crystal furnace and a diversion screen insulation layer, so as to reduce the oxygen donor.

Description

technical field [0001] The invention relates to the technical field of single crystal production technology, in particular to a production process method for controlling oxygen donor single crystal. Background technique [0002] In recent years, with the changes in the market situation, the requirements for product quality are extremely strict. In the single crystal production process, oxygen donor single crystal is an important part of unqualified single crystal, and the proportion of oxygen donor single crystal accounts for 30% of the production single crystal. , resulting in a large proportion of oxygen donor single crystals that cannot meet the needs of the market situation, and the profit margin of single crystal sales continues to decline. A large number of oxygen donor single crystals will directly increase production costs and cause serious economic losses to the company. Therefore, it is imminent to effectively reduce oxygen donor single crystals, continuously impro...

AI Technical Summary

Problems solved by technology

[0002] In recent years, with the changes in the market situation, the requirements for product quality are extremely strict. In the single crystal production process, oxygen donor single crystal is an important part of unqualified single crystal, and the proportion of oxygen donor single crystal accounts for 30% of the production single crystal. , resulting in a large proportion of oxygen donor single crystals that cannot meet the needs of the market situation, and the profit margin of single crystal sales continues to decline

A large number of oxygen donor single crystals will directly increase production costs and cause serious economic losses to the company. Therefore, it is imminent to effectively reduce oxygen donor single crystals, continuously improve the quality of single crystals, and reduce production costs.

Images