Automatic overheating process

Abstract

The invention provides an automatic overheating process, which is used for carrying out overheating welding within overheating welding time after seed crystal is automatically reduced in a temperaturestabilizing process, and comprises the following steps of: S1, measuring the diameter of the seed crystal, carrying out timing, and recording the maximum value of the diameter of the seed crystal inthe timing process; S2, carrying out automatic temperature adjustment according to the liquid level temperature of the silicon solution, and adjusting the liquid level temperature of the silicon solution to the welding temperature; S3, carrying out overheating welding and timing, and recording the minimum value of the seed crystal diameter in the timing process; and S4, calculating an overheatingdiameter reduction difference value of the seed crystal, and judging whether overheating is completed or not according to the overheating diameter reduction difference value. The method has the beneficial effects that automatic overheating is carried out according to the operation steps of manually judging overheating of the seed crystals, the phenomenon of diameter shrinkage during overheating ofthe seed crystals is automatically detected, labor hour waste and abnormal accidents caused by insufficient artificial experience are avoided, the temperature stabilizing labor hour is shortened, theyield is increased, and the competitiveness of enterprises is improved.

Description

technical field [0001] The invention belongs to the technical field of Czochralski single crystal, and in particular relates to an automatic overheating process. Background technique [0002] At present, the competition in the industry is becoming increasingly fierce, and cost reduction and efficiency increase have become a magic weapon for an enterprise to survive. At present, in the production process of solar photovoltaic material manufacturing, except for the equal-diameter process state (automatic has been realized), the operation is the most difficult and takes the longest time. The state of the art process is temperature stabilization. At present, the manual temperature stabilization method is generally used in the industry. The manual temperature stabilization method is very dependent on operating experience, and requires the continuous attention of the operator, which takes up a lot of manual energy and practice. [0003] The current industry average of manual temp...

AI Technical Summary

Problems solved by technology

[0005] In view of the above problems, the problem to be solved by the present invention is to provide an automatic overheating process, which can automatically detect the phenomenon of diameter shrinkage when the seed crystal is overheated when it is applied in the temperature stabilization process. The degree of automation is high, and the working hours caused by insufficient manual experience Waste and Occurrence of Unusual Accidents