Substrate Container Mapping with Dynamic Threshold Detection
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Solution Overview
Problem
Existing mapping systems struggle to accurately detect the accommodated state of substrates in containers within semiconductor factories, particularly when different types of substrates with varying sizes and thicknesses are transported, leading to confusion between proper and improper detection results.
Innovation Solution
A mapping system that includes a substrate information acquisition unit to gather information on substrate thickness and material, a mapping threshold determining unit to set optimized thresholds based on this information, and a mapping unit to perform accurate detection using these thresholds, ensuring precise identification of substrate states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fixed mapping threshold is used for detecting substrate accommodated state, then the detection system is simple and fast, but the detection precision deteriorates when different types of substrates with varying sizes and thicknesses are transported
Solution Approach 1:
The mapping threshold is made dynamic by adjusting it according to substrate information (thickness, material) acquired before detection. The threshold determination unit calculates an appropriate threshold value based on the specific substrate type, allowing the detection system to adapt to different substrate characteristics without requiring multiple fixed detection systems.
Solution Approach 2:
The system changes the detection parameter (mapping threshold) based on substrate-specific parameters (thickness, material). By acquiring substrate information through the substrate information acquisition unit and using this to determine optimal threshold values, the system maintains high detection precision across diverse substrate types while using a single detection apparatus.
2Measurement precision
If substrate information is acquired and mapping thresholds are optimized for each substrate type, then detection precision improves, but the time required for detection increases
Solution Approach 1:
Substrate information (thickness, material) is acquired and mapping thresholds are determined before the actual detection process. This preliminary action allows the detection unit to use pre-calculated optimal thresholds during mapping, avoiding time-consuming real-time calculations and enabling fast detection while maintaining high precision for each substrate type.
3Reliability
If the mapping system uses generic detection thresholds applicable to all substrates, then the system operation is simple, but false detection results occur when wide and thin substrates are accommodated
Solution Approach 1:
The system incorporates feedback by acquiring substrate information and using this feedback to adjust the mapping threshold before detection. The substrate information acquisition unit provides feedback about the specific substrate type, which then feeds into the threshold determination unit to select or calculate the appropriate threshold, ensuring accurate detection while maintaining simple operation through automated threshold selection.
Data Source
AI summary
The present disclosure relates to a mapping system capable of accurately detecting an accommodated state of the object accommodated in the container even when the containers accommodating different objects are being transported within a semiconductor factory. A mapping system includes a substrate information acquisition unit acquiring a substrate information regarding a substrate accommodated in a predetermined container that is being transported or is in a state ready to be transported within a factory; a mapping threshold determining unit determining a mapping threshold used for mapping the predetermined container based on the substrate information; and a mapping unit for mapping the predetermined container using the mapping threshold