Substrate Transfer Position Monitoring to Prevent Stage Contact
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Solution Overview
Problem
In vertical-type heat treatment apparatuses, there is a risk of substrate contact with transfer units, which can lead to damage during transfer operations, and existing systems lack effective methods to predict and prevent such contact.
Innovation Solution
A transfer method that acquires positional information of the transfer unit and substrate stage, determines the risk of contact, and notifies when a risk is detected, utilizing a control device to manage and correct the transfer process to prevent contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If substrate transfer is performed using a transfer unit, then substrate transfer capability is improved, but risk of substrate contact and damage increases
Solution Approach 1:
The system performs preliminary risk assessment by acquiring positional information of the transfer unit and substrate stage before the transfer operation, determining potential contact risks in advance, and notifying operators or adjusting transfer parameters proactively to prevent substrate damage
Solution Approach 2:
The system continuously monitors positional information of the transfer unit and substrate stage, uses this feedback to determine contact risk in real-time, and adjusts transfer operations based on the risk assessment to prevent substrate damage while maintaining transfer capability
2Reliability
If positional monitoring is implemented to prevent contact, then substrate safety is improved, but system complexity increases
Solution Approach 1:
The control device performs multiple functions including acquiring positional information, determining contact risk, and notifying or adjusting transfer operations using a single integrated system, reducing the need for separate dedicated components for each function
Solution Approach 2:
The system uses its own positional information acquisition and determination capabilities to self-assess contact risk and self-adjust transfer operations, reducing the need for external monitoring systems or manual intervention
Data Source
AI summary
A transfer method transfers a substrate between a transfer unit configured to hold and transfer the substrate and a substrate stage serving as a transfer destination or a transfer source of the substrate. The transfer method includes: acquiring positional information of the transfer unit and positional information of the substrate stage; determining whether or not there is a risk for the substrate to contact with the substrate stage, based on the acquired positional information of the transfer unit and positional information of the substrate stage; and when determined that there is a risk for the substrate to contact with the substrate stage, notifying the risk according to the determination at the determining.