EDX Composition Analysis with Secondary Electron Ambiguity Resolution
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Solution Overview
Problem
Energy dispersion x-ray detectors have limited energy resolution, making it difficult to differentiate between materials with energy peaks that differ by less than the detector's resolution, leading to inaccurate composition analysis, particularly for materials like Iron and Fluorine.
Innovation Solution
A system that uses additional information from secondary electron images and backscattered electron images, along with energy spectra, to resolve ambiguities in composition analysis by selecting the correct material from a group of materials with ambiguous EDX composition determination, using a processor to generate an updated composition estimate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If energy dispersion x-ray detection is used for composition analysis, then the analysis speed and ease of operation are improved, but the measurement precision deteriorates when materials have overlapping energy peaks
Solution Approach 1:
The patent combines energy dispersive x-ray detection with secondary electron detection and backscattered electron detection in a single integrated system. By merging multiple detection modalities, the system maintains the speed advantages of EDX while adding the precision of secondary electron imaging and compositional contrast from backscattered electrons to resolve ambiguous peak assignments.
Solution Approach 2:
The patent uses secondary electron images and backscattered electron images as intermediary information to resolve ambiguities in energy spectrum analysis. These intermediate datasets provide spatial and compositional context that mediates between the fast but ambiguous EDX data and the need for precise material identification.
2Measurement precision
If higher energy resolution is achieved to differentiate materials with close energy peaks, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
Instead of using a single complex high-resolution detector, the patent merges multiple simpler detectors (EDX detector, secondary electron detector, backscattered electron detector) to achieve the functional equivalent of high energy resolution through data fusion and cross-validation.
Solution Approach 2:
The patent creates a multi-functional detection system where a single integrated apparatus performs energy dispersive x-ray detection, secondary electron detection, and backscattered electron detection. This universal system achieves high measurement precision through multiple functions rather than through a single complex high-resolution detector.
3Measurement precision
If additional detection modalities are added to resolve material ambiguities, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
The patent merges multiple detection modalities (EDX, secondary electron detection, backscattered electron detection) into a single integrated system that shares common infrastructure such as the electron beam source and signal processing electronics, thereby reducing the overall complexity compared to separate independent systems.
Solution Approach 2:
The integrated detection system performs multiple functions simultaneously - energy dispersive x-ray detection for compositional analysis, secondary electron detection for topographical imaging, and backscattered electron detection for compositional contrast - achieving high measurement precision through multi-functionality rather than through multiple separate specialized systems.
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
Improves the accuracy of composition analysis by differentiating between materials with overlapping energy peaks, enhancing the ability to characterize elements that were previously indistinguishable, and providing a corrected x-ray spectrum for further analysis.
Implementation Method 1
An energy dispersion x-ray detector (EDX) may be used for determining a composition of a microscopic element. An energy dispersion x-ray detector collects x-ray photons emitted as a result of an illumination of the microscopic element
Implementation Method 2
A system that uses additional information from secondary electron images and backscattered electron images
Implementation Method 3
A system that uses additional information from secondary electron images and backscattered electron images
Data Source
AI summary
A system, computer readable medium and a method for material analysis, the method may include (i) receiving or generating (a) an estimated composition of a microscopic element; wherein the estimated composition is responsive to an energy spectrum of, at least, the microscopic element; wherein the energy spectrum is obtained by an energy dispersive X-ray (EDX) detector; additional information related to, at least, the microscopic element, wherein the additional information is not obtained by the energy dispersive X-ray detector; and (ii) resolving an ambiguity in the estimated composition in response to the additional information, wherein the ambiguity occurs when the energy spectrum comprises a predefined energy peak that is attributed to a predefined material of ambiguous EDX composition determination.