Semiconductor Chamber Cleanliness Detection via Spectral Intensity
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Solution Overview
Problem
Existing semiconductor device chamber cleaning methods fail to detect contaminants on all regions without a workpiece, leading to potential damage and inefficiencies in the detection process.
Innovation Solution
A device detection method and system that acquires first and second spectral intensity graphs for predetermined regions in the chamber before and after processing tasks, using a spectrometer and analysis device to compare these graphs and detect cleanliness, thereby identifying contaminants without a workpiece and ensuring comprehensive detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional cleaning detection methods are used in semiconductor device chambers, then detection simplicity is maintained, but detection precision deteriorates due to blind spots and inability to detect all regions
Solution Approach 1:
The chamber detection is segmented into multiple predetermined regions, with spectral intensity graphs acquired for each region separately. This segmentation allows comprehensive coverage of all chamber surfaces including previously undetectable areas, improving detection precision without requiring a single complex detection system
Solution Approach 2:
A workpiece is introduced as an intermediary medium to enable detection. The workpiece is positioned to allow the spectrometer to detect spectral intensity graphs of chamber regions through it or around it, serving as a mediator that enables detection of areas that would otherwise be inaccessible
2Measurement precision
If comprehensive chamber detection is performed without a workpiece, then detection accuracy improves, but detection capability deteriorates due to inability to access certain regions
Solution Approach 1:
The workpiece is preliminarily positioned in the chamber before detection occurs. This preliminary arrangement enables the spectrometer to access and detect spectral intensity graphs from regions that would be inaccessible without the workpiece present, including areas behind or around the workpiece structure
3Reliability
If spectral intensity graphs are acquired for multiple predetermined regions, then cleanliness detection completeness improves, but detection time increases
Solution Approach 1:
The spectrometer continuously acquires spectral intensity graphs across multiple predetermined regions without interrupting the detection process. This continuous acquisition method maintains reliable detection completeness while minimizing total detection time compared to sequential or repeated measurements
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 improves detection efficiency and accuracy by allowing for the assessment of all chamber regions, reducing the risk of blind spots and ensuring cleaner semiconductor device operations.
Implementation Method 1
One or more first spectral intensity graphs for one or more predetermined regions in the cavity of the target device are acquired; One or more second spectral intensity graphs for the one or more predetermined regions when the target device has finished N processing tasks
Data Source
AI summary
A device detection method and system are provided. The method includes: acquiring first spectral intensity graphs for predetermined regions in the cavity of the target device; acquiring second spectral intensity graphs for the predetermined regions when the target device has finished N processing tasks, where N is a natural number; and detecting the cleanliness in the cavity of the target device according to the first spectral intensity graphs and the second spectral intensity graphs.