Charged Particle Microscope Aberration Detection During User Imaging
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Solution Overview
Problem
Charged particle microscopes face challenges in aligning and focusing the beam, particularly in determining astigmatism, which requires user intervention and is time-consuming and non-intuitive, especially for novice users.
Innovation Solution
A method and system for determining aberration in charged particle microscopes by acquiring image data during normal user operation, processing it to determine aberrations, and adjusting settings automatically or manually based on the results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If autofocus and autostigmator functions are used to correct aberrations, then imaging quality is improved, but the operation time increases significantly
Solution Approach 1:
The system performs preliminary aberration determination by analyzing image data acquired during normal operation. The control unit processes image data to determine aberrations (focus, astigmatism) in advance, so that correction can be applied without requiring separate autofocus or autostigmator procedures, thus reducing operation time while maintaining imaging quality
Solution Approach 2:
The charged particle microscope performs self-diagnosis and self-correction by automatically analyzing its own image data to determine aberrations. The control unit processes the image data to identify focus and astigmatism issues, and the system automatically applies corrections without requiring separate user-initiated procedures, making the system self-sufficient and reducing operational time
2Measurement precision
If manual stigmation adjustment is performed by novice users, then correction of astigmatism is attempted, but the ease of operation deteriorates due to lack of intuition and training
Solution Approach 1:
The system performs automatic aberration determination by processing image data acquired during normal operation. The control unit analyzes the image data to determine astigmatism and focus conditions without requiring user intervention or manual adjustment, eliminating the need for novice users to understand complex stigmation controls and making the system intuitive to use
Solution Approach 2:
The control unit continuously processes image data to provide feedback on aberration conditions (focus, astigmatism). This automated feedback mechanism allows the system to automatically determine and correct aberrations based on real-time image quality, removing the burden from users to manually assess and adjust stigmation settings
Data Source
AI summary
The invention relates to a method of determining an aberration of a charged particle microscope. The method comprises a step of providing a charged particle microscope that is at least partly operable by a user. Then, a set of image data is obtained with said charged particle microscope. The image data is processed to determine an aberration of said charged particle microscope. According to the invention, said set of image data is actively obtained by a user. In particular, the image data may be obtained during normal operation of the microscope by a user, which may include navigating and/or focusing of the microscope. Thus, the set of image data is acquired by said user, and not by the controller thereof. This allows background processing of an aberration, and aberration correction during use of the charged particle microscope. The invention further relates to a charged particle microscope incorporating the method.