Focused Inert Gas Ion Beam Marking Solid State Materials
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Solution Overview
Problem
Existing methods for marking solid state materials like gemstones often damage the material, result in visible marks, or leave chemical residues, which can detract from their aesthetic and monetary value.
Innovation Solution
A method using focused inert gas ion beam local irradiation to create protrusions on the surface of polished facets of solid state materials, inducing expansive strain within the crystal lattice without significant material loss or altering optical properties, allowing for invisible marks visible only under specific lighting conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If etching, engraving or micro-milling processes are used for marking, then identification marking can be provided on the gemstone, but the integrity and quality of the gemstone is impacted and material loss occurs
Solution Approach 1:
The invention changes the physical state and properties of the gemstone surface through controlled ion beam irradiation, creating protrusions by modifying the crystal lattice structure rather than removing material. This parameter change approach transforms the surface topology through energy input that causes localized expansion and phase changes in the crystal structure.
Solution Approach 2:
The invention replaces traditional mechanical marking methods (etching, engraving, micro-milling) with a focused ion beam system. Instead of using mechanical tools that physically remove material, the ion beam delivers energy to induce controlled structural changes and expansion in the crystal lattice, creating markings through a non-mechanical process.
2Loss of information
If traditional marking techniques are used, then identification can be provided, but the marking is visible to the naked eye and detracts from the aesthetic quality of the gemstone
Solution Approach 1:
The invention creates highly localized protrusions on the gemstone surface with precise control over their size, shape, and distribution. These localized structural changes are sufficient to create detectable diffraction patterns under magnification while remaining below the threshold of naked-eye visibility, thus maintaining local aesthetic quality while providing identification functionality.
Solution Approach 2:
The invention utilizes optical diffraction effects created by the periodic arrangement of protrusions to produce visible markings only under magnification. The structured surface creates interference patterns that can be detected with appropriate lighting and magnification equipment, while the individual protrusions remain too small to be seen by the naked eye.
3Loss of information
If focused ion beam ablation is used to form marks, then identification marking is achieved, but chemical residue remains and post-processing cleaning is required
Solution Approach 1:
The invention uses a focused beam of inert gas ions (such as helium or neon) to create the markings. The inert nature of these gas ions prevents chemical reactions with the gemstone material, avoiding the formation of chemical residues that would require cleaning. The process occurs in a vacuum environment that further prevents contamination.
Solution Approach 2:
The ion beam process directly creates the desired protrusion structures through controlled energy deposition and crystal lattice expansion, without generating harmful byproducts that require removal. The process is self-contained and leaves no residue requiring post-processing cleaning steps.
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 method preserves the integrity and appearance of the material while providing secure, invisible markings that can be identified with a microscope, eliminating the need for invasive techniques and post-processing.
Implementation Method 1
applying focused inert gas ion beam local irradiation towards an outer surface of a polished facet of a solid state material so as to form a protrusion on the outer surface; wherein irradiated focused inert gas ions from said focused inert gas ion beam penetrate the outer surface
Implementation Method 2
irradiated focused inert gas ions cause expansive strain within the solid state crystal lattice of the solid state material below said outer surface at a pressure so as to induce expansion of solid state crystal lattice
Data Source
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AI summary
A method of forming one or more protrusions on an outer surface of a polished face of a solid state material includes the step of applying focused inert gas ion beam local irradiation (105) towards an outer surface of a polished facet of a solid state material (109) so as to form a protrusion (401) on the outer surface; wherein irradiated focused inert gas ions from said focused inert gas ion bean penetrate the outer surface of said polished facet of said solid state material; and wherein irradiated focused inert gas ions cause expansive strain within the solid state crystal lattice of the solid state material below said outer surface at a pressure so as to induce expansion of solid state crystal lattice, and form a protrusion on the outer surface of the polished face of said solid state material.