Dual Broad Ion Beam Source Layout for Continuous Sample Polishing
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Solution Overview
Problem
Current BIB polishing systems face inefficiencies due to the need for precise sample alignment with masks, which slows down the workflow, and frequent cleaning of the ion beam source due to rapid material redeposition, limiting their use primarily to academic applications.
Innovation Solution
A dual BIB source system is implemented, allowing one source to operate while the other is maintained or cleaned without disrupting the processing, and a sealed housing maintains the internal environment, enabling continuous sample processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single BIB source is used for sample processing, then the system structure is simple, but the system downtime increases due to frequent cleaning of the source
Solution Approach 1:
The system is divided into multiple independent BIB sources (first BIB source and second BIB source) that can operate independently. This segmentation allows one source to be cleaned or maintained while the other continues processing samples, thereby reducing system downtime without significantly complicating the overall structure
Solution Approach 2:
The patent implements a redundancy strategy where a standby BIB source is available to take over when the active source requires cleaning. The active source is temporarily discarded from service while being cleaned, and the standby source is recovered and activated to maintain continuous operation
2Productivity
If higher current broad ion beam is used to remove sample material more rapidly, then the sample preparation speed increases, but the rate of redeposition onto the source increases requiring more frequent cleaning
Solution Approach 1:
By segmenting the ion beam source into multiple independent units, the system can maintain high current operation for rapid sample preparation while one source accumulates redeposited material. When cleaning is needed, the system switches to the other source, allowing the first source to be cleaned without interrupting the high-speed processing capability
3Manufacturing precision
If precise alignment with masks is required for sample processing, then the processing accuracy improves, but the workflow speed decreases
Solution Approach 1:
The patent implements pre-alignment of samples with masks before they enter the main processing chamber. This preliminary action ensures that when samples are processed by the high-current ion beam, the alignment is already established, reducing the time needed for precise positioning during actual processing and thereby increasing workflow speed while maintaining precision
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 setup increases system uptime and efficiency by allowing uninterrupted processing of multiple samples, reducing downtime and enhancing throughput.
Implementation Method 1
BIB polishing systems directing a high energy, unfocused or minimally focused beams of ions (e.g., Argon ions) at a sample, where the beam degrades and/or otherwise removes the portions of the sample upon which it is incident
Implementation Method 2
using a pump system to bring at least one of the pressure and gaseous composition of the housing volume to match that of the interior volume
Data Source
AI summary
Systems and methods for operating a broad ion beam (BIB) polisher in a sample preparation workflow having improved uptime, are disclosed. An example method for operating a broad ion beam (BIB) polisher having improved uptime according to the present invention comprises causing a first BIB source to emit a first broad ion beam towards a sample positioned within an interior volume of the BIB polisher while the first BIB source is in emitting the first broad ion beam towards the sample, removing a second BIB source from the BIB polisher that is configured to emit a second broad ion beam towards the sample when in use.