Substrate Transfer Error Analysis via Dual-Resolution Imaging
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Solution Overview
Problem
Current substrate processing systems face challenges in quickly and accurately analyzing transfer errors during substrate handling, as existing detection methods require sorting through large amounts of visual image data to identify issues like position shifts, drops, or damage, leading to inefficiencies in error analysis.
Innovation Solution
A system that records substrate transfer operations as both low-resolution event data and high-resolution alarm data, allowing for simultaneous display of both on a single screen, enabling efficient analysis of transfer errors by correlating event and alarm images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous visual image data is recorded during substrate transfer operations, then complete record of transfer operations is achieved, but time required for analysis increases due to huge amount of image data
Solution Approach 1:
The patent segments image data recording into two distinct modes: continuous low-resolution recording for complete coverage, and triggered high-resolution recording for detailed error analysis. This segmentation allows the system to maintain comprehensive monitoring while reducing overall data storage requirements and enabling faster analysis by only examining high-resolution images when errors occur.
Solution Approach 2:
The patent applies partial action by recording high-resolution images only when transfer errors are detected, rather than continuously recording high-resolution data. This selective approach captures sufficient detail for error analysis without the time and storage burden of continuous high-resolution recording, thus reducing analysis time while maintaining detection reliability.
2Measurement precision
If high-resolution image data is recorded continuously, then detailed error state is captured, but storage requirements and data processing time increase significantly
Solution Approach 1:
The patent implements local quality by applying different resolution levels to different operational states: low-resolution recording during normal operations and high-resolution recording during error events. This ensures that detailed information is available precisely where needed (during errors) while minimizing overall data storage requirements.
Solution Approach 2:
The system records high-resolution data only partially, specifically when transfer errors are detected through sensors or monitoring systems. This selective high-resolution recording captures necessary detail for accurate error analysis while dramatically reducing the total quantity of image data that must be stored and processed compared to continuous high-resolution recording.
3Productivity
If only low-resolution image data is displayed, then data processing is fast, but detailed error analysis becomes difficult
Solution Approach 1:
The patent employs dynamic resolution switching where the display system adapts resolution based on operational context. During normal operations, low-resolution images are displayed for quick overview. When errors occur, the system dynamically switches to displaying high-resolution images, providing both fast processing during normal operation and detailed analysis capability when needed.
Solution Approach 2:
The display system segments image presentation into two levels: low-resolution for general monitoring and fast processing, and high-resolution for detailed error analysis. This segmentation allows operators to quickly scan through transfer operations using low-resolution data while being able to examine specific error events in detail using high-resolution images, thus maintaining both speed and precision.
Data Source
AI summary
There is provided a technique that includes a first controller configured to acquire event data generated at a time of transferring a substrate and alarm data generated at a time of occurrence of a transfer error, a recorder configured to, while recording a transfer operation of the substrate as first image data, record the transfer operation of the substrate as second image data having a higher resolution than the first image data, a second controller configured to store the first image data in a first memory based on the event data, and store the second image data in a second memory based on the alarm data, and an operating controller configured to display at least the first image data and the second image data. The second controller displays both the first image data and the second image data on a same screen.