Probe Cassette Vacuum Release Sequence for Automated SPM Transfer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing scanning probe microscopes require manual probe replacement, which is skill-intensive, disrupts instrument use, and lacks accurate alignment control, leading to potential damage and inefficiency.
Innovation Solution
A probe cassette with selectively activatable vacuum channels allows automated probe transfer by maintaining the probe's mounting position through controlled vacuum release, ensuring precise alignment and reducing manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual probe replacement is used, then the operator can replace the probe, but the procedure requires significant skill, causes instrument unavailability, and lacks precise alignment control
Solution Approach 1:
The system enables self-service automated probe exchange where the pick-up means automatically grasps, transfers, and aligns probes without human intervention. The controller coordinates the entire process including activating the pick-up means, moving the probe to the probe mount, and adjusting alignment, eliminating the need for skilled manual operation and restoring instrument availability continuously
Solution Approach 2:
Manual mechanical probe handling is replaced with an automated mechanical system consisting of a pick-up means (such as a gripper or suction device), a controller, and a probe mount. This automated mechanical system performs all probe replacement tasks including grasping, transferring, and positioning, eliminating manual skill requirements and reducing instrument downtime
2Extent of automation
If automated probe exchange is implemented, then probe replacement can be automated, but control over the probe chip during transfer may be insufficient leading to inaccurate alignment
Solution Approach 1:
The system incorporates feedback control where the controller monitors the probe transfer process and automatically adjusts the alignment of the probe mount or pick-up means based on detected position deviations. This closed-loop control ensures accurate probe alignment even during automated transfer, maintaining manufacturing precision while achieving full automation
Solution Approach 2:
The probe mount and pick-up means are designed with dynamic adjustment capabilities, allowing real-time modification of position and orientation during the automated transfer process. This dynamic control enables the system to compensate for positioning variations and achieve precise probe alignment automatically, resolving the contradiction between automation extent and alignment accuracy
3Reliability
If the probe is held in storage, then the probe can be protected, but the vacuum must be maintained to keep the probe in position
Solution Approach 1:
The vacuum system is segmented into separate controllable vacuum chambers or zones within the probe storage and transfer mechanism. This allows the controller to apply vacuum only to specific regions where probes are stored or being handled, rather than maintaining vacuum throughout the entire system, thereby reducing energy consumption while maintaining probe storage stability through localized vacuum application
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
Enables accurate, automated probe exchange with reduced instrument downtime, improved alignment, and minimized risk of damage, while allowing external storage for reduced contamination.
Implementation Method 1
a first vacuum channel with flow resistance R1 and second vacuum channel with a flow resistance R2 respectively fluidly connecting the first and second vacuum chamber to an outlet fluidly connectable to an external vacuum, such that upon application of the external vacuum a mounting position of the probe relative to the cassette and a mounting position of the cassette relative to the sample stage may be maintained
Data Source
Figure 1A~1B
Figure 2
Figure 3A~3B
AI summary
The present disclosure concerns probe cassette 1 for holding a probe 60 in storage to provide automated transfer of the probe to a probe mount of a scanning probe microscope. The probe cassette comprising a first vacuum chamber C1 with a volume V1, and a second vacuum chamber C2 with a volume V2, and a first and second vacuum channel 10, respectively fluidly connecting the first and second vacuum chamber to an outlet 30 fluidly connectable to an external vacuum, such that upon application of the external vacuum a mounting position of the probe relative to the cassette and a mounting position of the cassette relative to the sample stage is maintained. The probe cassette arranged to allow breaking a vacuum condition in the second chamber maintaining the mounting position of the probe before breaking a vacuum condition in the first chamber maintaining a mounting position of the probe cassette.