Automated Seed Melt Back Measurement in Crystal Growth
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Solution Overview
Problem
Manual measurement of seed melt back in crystal growth processes is prone to human error and inefficiency, leading to unexpected crystallographic structures and imperfections in crystalline materials.
Innovation Solution
An automated system that lifts the boule using actuating devices and measures the seed melt back using a vision system installed on an imaging device, transmitting the measurement to a controller to adjust furnace conditions and determine the crystallographic structure, ensuring the melt back remains within a predetermined diameter range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual measurement methods are used to measure seed melt back, then the measurement process is simple to perform, but human error increases and measurement precision deteriorates
Solution Approach 1:
The patent replaces manual mechanical measurement tools (vernier calipers, illuminated tools) with an automated vision system using digital imaging devices and image processing algorithms. This substitution eliminates human error in measurement while maintaining ease of operation through automated image capture and analysis of the boule's crystal structure.
Solution Approach 2:
The patent creates a digital copy (image) of the boule's physical structure using a vision system. Instead of directly measuring the physical object with manual tools, the system captures an image and analyzes it computationally, thereby eliminating human error while keeping the measurement process simple and automated.
2Device complexity
If manual measurement methods are used to measure seed melt back, then the equipment complexity is low, but productivity deteriorates due to inefficiency
Solution Approach 1:
The patent replaces simple manual measurement tools with an automated vision system that uses digital imaging and image processing. Although the equipment becomes more complex, it dramatically improves productivity by enabling rapid, automated measurement of seed melt back without human intervention, allowing faster quality control in crystal growth production.
Solution Approach 2:
The vision system performs self-measurement by automatically capturing images and processing them to determine seed melt back dimensions. This eliminates the need for manual operation while improving productivity, as the system can continuously measure multiple boules without human intervention or fatigue.
3Loss of time
If manual measurement methods are used to measure seed melt back, then the measurement process is quick to perform, but reliability deteriorates due to human error
Solution Approach 1:
The patent creates a permanent digital record (image) of each measurement, which can be stored, reviewed, and re-analyzed if needed. This digital copying process maintains measurement speed while improving reliability, as the image data provides an objective, unchanging record that eliminates human error and allows for verification.
Solution Approach 2:
The patent replaces human-operated mechanical measurement with an automated vision system that consistently applies the same measurement algorithms to all samples. This substitution maintains rapid measurement while dramatically improving reliability by eliminating variability introduced by different operators or human fatigue.
4Measurement precision
If automated vision system is used to measure seed melt back, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent uses automated vision systems with digital imaging devices and image processing algorithms to measure seed melt back. This substitution of mechanical measurement tools with optical and computational systems achieves high measurement precision while managing device complexity through integration of standardized imaging components and software-based analysis.
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
This approach enables rapid and accurate measurement of seed melt back, reducing human error and improving the quality of crystalline materials by maintaining precise control over the crystallographic structure and preventing cracking or deformations.
Implementation Method 1
measuring the seed melt back of a produced boule... using a vision system installed on an imaging device
Implementation Method 2
the boule may be lifted with an actuating device onto a support table to automatically manipulate the boule from the furnace to the support table
Implementation Method 3
heat is then removed from the melted feedstock by applying a temperature gradient in the hot zone
Implementation Method 4
The feedstock is then heated to form a liquid feedstock melt
Implementation Method 5
directionally solidify the melt from the unmelted seed
Data Source
AI summary
A method and apparatus for measuring a melt back of a seed in a boule are provided. The method includes lifting a boule once it has been produced using an actuating device onto a support table to automatically manipulate the boule from a furnace to the support table. The melt back of the seed is then automatically measured using a vision system that is installed on an imaging device disposed below the boule.