Lattice Distortion Analysis via Overlapping Region Segmentation
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Solution Overview
Problem
Existing techniques for analyzing lattice dislocations in specimens face challenges in achieving high accuracy while maintaining high spatial resolution, particularly due to errors in orientation measurements and limitations in conventional tile-based approaches that result in loss of information and reduced detail in dislocation maps.
Innovation Solution
A method that generates distortion information for target locations by combining crystal lattice orientation data from overlapping regions, allowing for improved accuracy without compromising spatial resolution, and produces high-resolution dislocation information maps that can indicate dominant dislocation types across the specimen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional tile-based approaches are used to analyze lattice dislocations, then measurement precision can be improved, but spatial resolution deteriorates due to loss of information and reduced detail in dislocation maps
Solution Approach 1:
The patent divides the specimen into multiple overlapping regions, each analyzed independently to produce distortion information. This segmentation allows detailed local analysis while the overlapping nature preserves spatial continuity and resolves the contradiction between precision and spatial resolution.
Solution Approach 2:
The patent introduces a new dimensional approach by creating overlapping regions that extend beyond the conventional non-overlapping tile structure. This additional dimensional aspect (overlapping boundaries) enables simultaneous improvement of measurement precision and preservation of spatial resolution by allowing distortion information to be derived from multiple perimeter locations.
2Manufacturing precision
If tile-based analysis is used, then manufacturing precision of analysis can be improved, but device complexity increases due to conventional approach limitations
Solution Approach 1:
The analysis method segments the specimen into multiple overlapping regions, each processed independently to generate distortion information. This segmentation simplifies the overall complexity by breaking down the complex task of high-precision dislocation mapping into manageable regional analyses while maintaining high precision through the overlapping region approach.
3Ease of operation
If conventional methods are used, then ease of operation is maintained, but measurement precision deteriorates due to errors in orientation measurements
Solution Approach 1:
The patent introduces perimeter locations as intermediary elements that bridge the gap between simple operational procedures and high measurement precision. By deriving distortion information from orientation measurements at perimeter locations of overlapping regions, the method maintains ease of operation while improving precision through the intermediary role of perimeter-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 provides more precise and detailed dislocation information maps, enhancing the ability to analyze lattice distortions and material response to stress, while minimizing errors associated with conventional methods.
Implementation Method 1
The technique uses a detector to capture electron diffraction patterns ('Kikuchi patterns') that are generated by focusing an electron beam onto the surface of a sample in a scanning electron microscope (SEM).
Data Source
AI summary
A method for analysing lattice distortion in a specimen is provided. The method comprises, for each of a plurality of target locations in a specimen: obtaining crystal lattice orientation information for the specimen at each of a plurality of perimeter locations along a path corresponding to a perimeter of a region of the specimen that contains the target location; and generating, in accordance with the obtained crystal lattice orientation information, distortion information for the target location within the region, the distortion information being representative of crystal lattice distortion attributable to crystal lattice dislocations within the region. Each region containing one of the plurality of target locations partially overlaps another region, containing a different one of the said target locations. The method further comprises outputting a set of output data comprising the generated distortion information for the plurality of target locations.