Indium Phosphide Single Crystal Furnace Cooling Crystallization Temperature Control Model Research

Area of Science:

• Materials Science
• Solid State Physics
• Semiconductor Manufacturing

Background:

• Indium phosphide (InP) single crystals are vital III-V semiconductors for optical and microwave communications.
• The Vertical Gradient Freeze (VGF) method is preferred for InP production due to its temperature control.
• Defects like twins and dislocations commonly occur during VGF growth, impacting crystal quality.

Purpose of the Study:

• To investigate the impact of thermal field cooling rates on defect formation in InP single crystals.
• To develop an optimized cooling model for VGF growth to enhance InP crystal quality and yield.
• To provide a theoretical and experimental basis for defect reduction in industrial InP production.

Main Methods:

• Established a thermal field model for an InP VGF furnace.
• Analyzed temperature variation characteristics during crystal growth.
• Performed numerical analysis of cooling crystallization data using a spline regression algorithm to fit an optimal cooling model.

Main Results:

• Identified the critical role of the cooling rate in the thermal field for defect generation (twins, dislocations, polycrystallization).
• Developed and validated an optimal cooling model that effectively controls internal stress and reduces defect formation.
• Successfully suppressed defects, significantly improving the quality of InP single crystals.

Conclusions:

• The developed cooling model provides a robust method for improving InP single crystal quality.
• This research offers a solid theoretical foundation and practical support for defect-free InP production.
• The findings contribute to enhanced yield and reliability in InP-based device manufacturing.