Liquid Silicon Feeding Device for Stable Crystal Pulling
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Solution Overview
Problem
The continuous feeding of solid silicon material into a crucible in a single crystal furnace during monocrystalline silicon growth causes oscillation and ripple formation in the liquid material, leading to breakage and poor growth of monocrystalline ingots, reducing the success rate of crystal pulling.
Innovation Solution
A liquid feeding device that converts solid silicon material into liquid form within a melting cavity using a heating component, and then conveys this liquid material to the crucible, with real-time adjustments based on temperature and weight feedback to control the supply and melting rate, minimizing oscillation and improving growth quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If solid silicon material is fed into the crucible, then continuous supply of material is achieved, but oscillation and ripple formation occur in the liquid material
Solution Approach 1:
The patent applies preliminary action by melting solid silicon material in advance in a separate melting cavity before it enters the crucible. The material is pre-processed in a liquid state through heating components, ensuring it is already in the desired form before contact with the crucible contents, thereby preventing oscillation and ripple formation during the feeding process.
Solution Approach 2:
The patent introduces an intermediary melting cavity that acts as a buffer between the solid material supply and the crucible. This intermediate chamber melts the material and allows controlled transfer of liquid material, isolating the crucible from the mechanical disturbance of solid material feeding while maintaining continuous supply.
2Quantity of substance
If solid material is fed into the crucible, then material supply is maintained, but ripples extend from periphery to center causing breakage
Solution Approach 1:
The system performs preliminary melting of solid material in a dedicated melting cavity before introduction to the crucible. This advance preparation ensures material is supplied in liquid form, eliminating the impact and ripple formation that would otherwise occur during solid material feeding, thus maintaining both supply continuity and crystal growth reliability.
Solution Approach 2:
The melting cavity serves as an intermediary device that decouples the material supply mechanism from the crystal growth environment. By melting material beforehand and controlling its transfer, the system maintains continuous material supply while protecting the crucible interior from disruptive ripples that cause breakage.
3Stability of the object's composition
If liquid material is fed into the crucible, then oscillation degree is reduced, but additional melting equipment is required
Solution Approach 1:
The patent merges the melting function with the feeding mechanism by integrating heating components directly into the melting cavity structure. The heating components are positioned to efficiently melt material while the melted liquid flows directly into the crucible, combining multiple functions in a unified system that reduces overall complexity despite adding melting capability.
Solution Approach 2:
The melting cavity is designed with multi-functionality, serving both as a material holding chamber and an active melting zone with integrated heating. This universal design allows the same structure to perform multiple operations - storing solid material, melting it to liquid, and facilitating controlled transfer - thereby managing complexity through functional integration rather than separate dedicated components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution reduces oscillation and ripple formation, enhancing the success rate and quality of monocrystalline silicon growth by stabilizing the liquid level in the crucible, preventing breakage and improving growth performance.
Implementation Method 1
the heating component melts solid material in the melting cavity into liquid material
Implementation Method 2
When the liquid material in the melting cavity is fed into the crucible
Data Source
AI summary
This application provides a liquid feeding device, a single crystal furnace and a supplying method therefor, and a crystal pulling method, and relates to the field of crystal growth. The liquid feeding device includes a melting device and a supplying device. The melting device is connected to an exterior of the single crystal furnace. The melting device includes a melting cavity and a heating component. The heating component melts solid material in the melting cavity into liquid material, and conveys the liquid material to a crucible. The supplying device is configured to convey solid material into the melting cavity.