Crystal Growth Feedback Control for Temperature and Pulling Speed
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Solution Overview
Problem
Current crystal growth processes face challenges in accurately controlling crystal growth parameters, such as temperature and pulling speed, which affect the quality of the crystal and the performance of devices made from them.
Innovation Solution
A method and system that continuously monitor actual crystal parameters in real-time, compare them to reference parameters, and adjust temperature and pulling speed accordingly, using a control system that includes processors, storage, and sensors to manage the crystal growth process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual control methods are used for crystal growth parameters, then the device complexity is reduced, but the manufacturing precision and quality of the crystal deteriorate
Solution Approach 1:
The patent implements a closed-loop feedback control system that continuously monitors actual crystal growth parameters (mass, diameter, height, shape) and compares them with reference parameters. Based on the deviations detected, the system automatically adjusts temperature and pulling speed in real-time, ensuring precise control of crystal growth while maintaining a manageable control architecture through modular sensor integration and parameter comparison mechanisms.
2Manufacturing precision
If real-time monitoring and adjustment systems are implemented, then the manufacturing precision of crystal growth is improved, but the device complexity and cost increase
Solution Approach 1:
The control system operates autonomously by automatically detecting deviations between actual and reference crystal parameters, calculating appropriate adjustments, and executing temperature and pulling speed modifications without continuous human intervention. This self-regulating mechanism maintains high crystal quality consistency while reducing the need for complex manual control interfaces and extensive operator training.
Solution Approach 2:
The patent replaces manual mechanical control operations with automated electronic control systems that use sensors, processors, and actuators to adjust crystal growth parameters. This substitution eliminates the need for complex manual adjustment mechanisms and enables more precise, repeatable control of temperature and pulling speed through electronic feedback loops.
3Manufacturing precision
If frequent parameter adjustments are made during crystal growth, then the manufacturing precision is improved, but the productivity and growth speed may be reduced
Solution Approach 1:
The control system implements periodic monitoring and adjustment cycles, measuring crystal growth parameters at regular intervals and making controlled adjustments to temperature and pulling speed. This periodic approach maintains high parameter accuracy by detecting and correcting deviations before they accumulate, while minimizing disruptions to the overall growth process and maintaining efficient production rates.
Data Source
AI summary
The embodiments of the present disclosure disclose a method for controlling crystal growth. The method includes: obtaining an actual crystal parameter in a target time slice; obtaining a reference crystal parameter in the target time slice; determining a temperature control parameter based on the actual crystal parameter and the reference crystal parameter; determining a pulling control parameter based on the actual crystal parameter and the reference crystal parameter; and adjusting a temperature and a pulling speed in a next time slice after the target time slice respectively based on the temperature control parameter and the pulling control parameter.