Multi-Beam Manipulator Electrode Segmentation for Aberration Control
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Solution Overview
Problem
Current multi-beam charged particle inspection tools face challenges in accurately manipulating and deflecting sub-beams in a multi-beam setup, leading to aberrations and reduced image quality due to the need for large voltages and complex electrode configurations, which complicates the design and increases aberrations.
Innovation Solution
A multi-beam manipulator device using a set of electrodes with pairs of parallel planar surfaces that electro-statically interact with sub-beams to apply deflection, allowing for simultaneous and controlled deflection of sub-beams across an array, reducing the complexity of individual component designs and minimizing aberrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex electrode configurations are used to manipulate sub-beams, then manipulation precision is improved, but device complexity increases and aberrations worsen
Solution Approach 1:
The manipulator device divides the electrode system into multiple pairs of electrodes, with each pair responsible for deflecting a specific line of sub-beams. This segmentation allows independent control of different beam lines while maintaining overall system precision, resolving the contradiction by distributing complexity across modular units rather than requiring a monolithic complex configuration.
Solution Approach 2:
Each pair of electrodes serves multiple functions: they deflect sub-beams in a specific direction, can be independently controlled for precise positioning, and work collectively with other electrode pairs to achieve comprehensive beam manipulation. This multi-functionality reduces the need for additional specialized components, thereby reducing overall device complexity while maintaining manipulation precision.
2Force
If large voltages are applied to electrodes to deflect sub-beams, then deflection capability is improved, but aberrations increase and image quality deteriorates
Solution Approach 1:
The total deflection requirement is divided among multiple electrode pairs, each handling a portion of the deflection task. This allows each electrode to operate at lower voltage levels while achieving the same overall deflection capability, thereby reducing aberrations caused by high voltage without sacrificing deflection performance.
Solution Approach 2:
The system changes the operational parameters by using multiple electrode pairs at optimized voltage levels rather than a single electrode pair at high voltage. This parameter optimization reduces the voltage-induced aberrations while maintaining sufficient deflection capability through the collective action of multiple electrodes.
3Productivity
If more sub-beams are included in the multi-beam array, then productivity is improved, but manipulation complexity and aberrations worsen
Solution Approach 1:
The multi-beam array is segmented into multiple lines, with each line handled by a dedicated electrode pair. This segmentation allows the system to scale to higher numbers of sub-beams in an organized manner, where each electrode pair manages a manageable subset of beams, preventing overall manipulation complexity from becoming unmanageable while maintaining high productivity.
Solution Approach 2:
The electrode arrangement uses parallel pairs positioned to handle different spatial dimensions of the beam array. This dimensional organization allows systematic expansion of the beam array size without proportionally increasing manipulation complexity, as the structured electrode layout provides a scalable framework for handling additional sub-beams.
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 solution enables efficient and precise manipulation of sub-beams, improving image quality and reducing the complexity of the manipulator array, allowing for higher density and number of sub-beams, while operating at lower voltages to minimize aberrations.
Implementation Method 1
the first pair of parallel planar electrode surfaces is configured to electro-statically interact with an entire line of sub-beams in the multi-beam so that it is capable of applying a first deflection amount to the paths of sub-beams
Data Source
AI summary
A multi-beam manipulator device operates on sub-beams of a multi-beam to deflect the sub-beam paths. The device include: an electrode as pairs of parallel surfaces. Each pair of parallel surfaces includes a first surface that is arranged along a side of a corresponding line of sub-beam paths and a second surface that is arranged parallel to the first surface and along an opposite side of the corresponding line of sub-beam paths. A first pair of parallel surfaces is configured to electrostatically interact with an entire line of sub-beams in the multi-beam so that it is capable of applying a deflection amount to the paths of sub-beams in a first direction. A second pair of parallel surfaces is configured to electro-statically interact with an entire line of sub-beams in the multi-beam so that it is capable of applying another deflection amount to the paths of sub-beams in a second direction.