Single-Crystal Diamond Composition for Low-Defect Optical Stability
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Solution Overview
Problem
Existing diamond materials used in precision cutting tools, infrared optical components, and magnetic sensors suffer from significant crystal defects and distortion, which hinder their performance.
Innovation Solution
Manufacturing single-crystal diamonds with controlled nitrogen and boron content, phase difference, and dislocation density through a temperature difference method, using specific growth conditions to minimize defects and distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional diamond materials are used for precision applications, then they provide basic functionality, but they suffer from significant crystal defects and distortion that hinder performance
Solution Approach 1:
The patent applies parameter changes by precisely controlling the nitrogen content (0.1-50 ppm) and boron content (0.1 ppm or less) during diamond crystal growth. By adjusting these chemical composition parameters and using a temperature difference method with controlled gradients, the invention achieves single-crystal diamonds with an average phase difference of 20 nm/mm or less and standard deviation of 10 nm/mm or less, significantly reducing crystal defects and distortion while improving performance reliability
2Manufacturing precision
If diamond materials with fewer defects are manufactured, then performance and optical properties improve, but the manufacturing process becomes more complex
Solution Approach 1:
The patent maintains manufacturing process simplicity while achieving high precision by optimizing key parameters: controlling nitrogen content at 0.1-50 ppm and boron content at 0.1 ppm or less. The temperature difference method uses a controlled temperature gradient during crystal growth to minimize defects, achieving an average phase difference of 20 nm/mm or less without requiring excessively complex manufacturing steps
Solution Approach 2:
The patent utilizes optical property changes (analogous to color changes in the principle) by measuring and controlling the phase difference of the diamond crystal. The phase difference measurement serves as an optical indicator of crystal quality, with the invention achieving an average phase difference of 20 nm/mm or less and standard deviation of 10 nm/mm or less, providing a measurable quality metric that guides the manufacturing process
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 resulting single-crystal diamonds exhibit fewer crystal defects and less distortion, enhancing strength, fracture resistance, and optical properties, making them suitable for precision cutting tools, laser windows, and magnetic sensors.
Implementation Method 1
growing a diamond crystal on the diamond seed crystal by a temperature difference method
Data Source
AI summary
A single-crystal diamond, wherein the single-crystal diamond has a nitrogen content based on the number of atoms of more than 0.1 ppm and 50 ppm or less, the single-crystal diamond has a boron content based on the number of atoms of 0.1 ppm or less, the single-crystal diamond has an average of a phase difference per unit thickness of 20 nm/mm or less, and the phase difference has a standard deviation of 10 nm/mm or less.