Rotatable Paddle Specimen Holder for TEM
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Solution Overview
Problem
Conventional specimen holders for charged particle microscopes lack versatility and adequate manipulability, particularly in transmission-type microscopes where specimens are delicate and require complex positioning and handling for imaging and preparation tasks.
Innovation Solution
A specimen holder with a rotatable paddle that allows 180-degree beta tilt functionality, enabling the specimen to be inverted and accessed from both sides while maintaining a constant orientation of one side relative to the charged-particle beam, along with a detachable design for easy interchange and storage, and a remote actuator system using a tensioned driving belt for precise rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional specimen holder design is used, then the structure is simple, but the versatility and manipulability are insufficient for complex specimen preparation and imaging tasks
Solution Approach 1:
The specimen holder is divided into functionally independent segments: a support structure for positioning, an elongated member for access, and a specimen mounting zone with rotatable paddle for manipulation. This segmentation allows each component to be optimized for its specific function while maintaining overall versatility without excessive complexity.
Solution Approach 2:
The specimen mounting zone incorporates a rotatable paddle that can be rotated about a transverse axis, transforming a static holder into a dynamic system. This dynamic capability enables sequential access to both sides of the specimen and multiple imaging orientations without requiring multiple separate holders, thereby improving versatility while adding only moderate structural complexity.
2Ease of operation
If a specimen holder with limited positioning capability is used, then the device is easy to operate, but adequate manipulability for delicate specimens cannot be achieved
Solution Approach 1:
The holder adds rotational freedom about a transverse axis to the conventional linear positioning capabilities. This dimensional enhancement allows the specimen to be oriented in multiple directions and both sides accessed sequentially, significantly improving manipulability for delicate specimens while maintaining relatively simple actuation mechanisms.
3Adaptability or versatility
If a fixed specimen holder design is used, then the manufacturing is simple, but the adaptability for different specimen types and preparation tasks is limited
Solution Approach 1:
The specimen holder is designed as a universal platform that can accommodate different specimen types and preparation tasks through its rotatable paddle mechanism. The same holder can be used for imaging, preparation, and sequential side access without requiring task-specific modifications, achieving multi-functionality while maintaining manufacturing simplicity through standardized components.
4Productivity
If a specimen holder requiring vacuum breaking for storage is used, then the storage is simple, but the workflow efficiency and productivity are reduced
Solution Approach 1:
The holder enables continuous workflow by allowing specimens to be prepared, imaged, and stored without breaking the vacuum. The rotatable paddle mechanism permits in-situ manipulation and positioning throughout the vacuum environment, eliminating interruptions and maintaining continuous productive action while adding minimal vacuum system complexity.
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
Enhances the manipulability and preparation of specimens by allowing sequential access to both sides of a specimen, facilitating accurate in situ preparation and machining, and enabling automated transfer and storage without breaking the vacuum.
Implementation Method 1
a remote actuator system using a tensioned driving belt for precise rotation
Data Source
AI summary
A specimen holder for a Charged Particle Microscope is disclosed. The holder has a support structure with an elongated member including a specimen mounting zone. The specimen mounting zone comprises a rotor with an axis perpendicular to the elongated member with a paddle connected to it which may be rotated. Specimens may be mounted on the paddle so that rotation of the paddle allows specimens to be rotated and/or inverted for microscopic observation on both sides. Specimens may either be directly mounted on the paddle, or on a grid, half-moon grid, lift-out grid, aperture frame, dielectric film, etc.