SPM Probe Positioning via Coordinate Registration
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Solution Overview
Problem
Conventional automated scanning probe microscopy (SPM) systems face navigation inaccuracy and increased scanning time due to limitations in video-based registration systems, leading to non-negligible location errors and mechanical degradation of probe tips.
Innovation Solution
The implementation of a scanning probe microscope system that utilizes a sample data module, probe positioning system, and SPM coordinate registration module to maintain and adjust sub-micron resolution positioning between the probe and sample, leveraging both optical-based and SPM coordinate systems for precise alignment and reduced navigation errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If video-based registration systems are used for probe positioning, then the system complexity is reduced and ease of operation is improved, but navigation accuracy deteriorates and location errors increase
Solution Approach 1:
The patent replaces video-based optical registration with a coordinate system-based positioning method that uses SPM scanner coordinates. The probe positioning is achieved through digital coordinate transformation and actuator control rather than visual alignment, eliminating the inherent limitations of video system resolution while maintaining ease of operation through automated coordinate-based navigation.
Solution Approach 2:
The patent introduces an intermediary coordinate registration module that acts as a mediator between the optical vision system and the SPM scanner. This module performs coordinate transformation and provides precise positioning commands to the probe actuators, enabling high-accuracy navigation without requiring direct video-based visual alignment.
2Device complexity
If video-based registration systems are used for probe positioning, then the device complexity is reduced, but scanning time increases due to navigation errors requiring repositioning
Solution Approach 1:
The patent replaces the video-based optical positioning system with a coordinate system-based approach that uses the SPM scanner's native coordinate framework. This substitution eliminates the need for complex video processing and manual visual alignment, thereby reducing device complexity while significantly improving scanning efficiency through direct coordinate-to-position mapping.
Solution Approach 2:
The patent creates a digital copy of the sample feature locations and scanner coordinate relationships through the coordinate registration module. This digital model allows the system to calculate precise probe positions without requiring repeated visual verification or physical repositioning, thereby reducing scanning time while maintaining simplicity.
3Ease of operation
If conventional probe positioning methods are used, then the system is simpler to operate, but probe tip mechanical degradation increases due to repeated repositioning adjustments
Solution Approach 1:
The patent replaces manual or video-based mechanical positioning adjustments with automated coordinate system-based positioning. The probe is repositioned using precise digital coordinate calculations that directly control the scanner actuators, eliminating the need for repeated visual alignment attempts and excessive mechanical adjustments that cause probe tip degradation.
Solution Approach 2:
The coordinate registration module provides feedback by continuously monitoring the relationship between scanner coordinates and actual probe positions. This feedback enables the system to make precise, minimal adjustments to probe positioning, reducing unnecessary mechanical movements and protecting the probe tip from degradation while maintaining ease of operation through automated control.
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 significantly reduces navigation errors and improves scanning efficiency by enabling sub-nanometer resolution positioning, thereby enhancing the accuracy and speed of probe tip placement and measurement automation.
Implementation Method 1
The probe position adjustment is effected by a cantilever positioning actuator that is driven by a driving circuit. Various technologies for cantilever actuators are known, including piezoelectric and magnetic transducers.
Implementation Method 2
the deflection of the cantilever in response to the probe tip's interaction with the sample is measured with an extremely sensitive deflection detector such as an optical lever system
Implementation Method 3
The probe is scanned over a surface using a high resolution three-axis scanner acting on the sample support, the probe, or a combination of both.
Data Source
AI summary
A scanning probe microscope (SPM) system and associated method. The SPM system having a probe adapted to interact with nanoscale features of a sample and scan within a target region to produce a three-dimensional image of that target region, the system maintaining location information for a plurality of features of interest of the sample according to a sample-specific coordinate system, wherein the SPM system is configured to adjust positioning of the probe relative to the sample according to a SPM coordinate system, the SPM system further configured to manage a dynamic relationship between the sample-specific coordinate system and the SPM coordinate system by determining a set of alignment errors between the sample-specific coordinate system and the SPM coordinate system and apply corrections to the SPM coordinate system to offset the determined alignment errors.