Dual Maglev Shuttle Rails for Stable Substrate Transfer
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Solution Overview
Problem
Existing substrate transfer systems in semiconductor and display processes face limitations in maximizing throughput due to factors such as processing time, vacuum robot speed, and environmental conditions, leading to inefficiencies and potential substrate damage.
Innovation Solution
A substrate transfer apparatus utilizing upper and lower magnetic levitation rails to stabilize shuttle movement, incorporating separate spaces for processed and unprocessed substrates, sensors for environmental monitoring, and impact-absorbing members to enhance stability and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional substrate transfer equipment is used, then the system can perform substrate processing, but the throughput is limited due to constraints in processing time, vacuum robot speed, and environmental preparation time
Solution Approach 1:
The patent replaces conventional mechanical vacuum robot systems with a magnetic levitation-based transfer mechanism. The moving plate with upper and lower magnetic levitation rails enables contactless substrate transport, eliminating mechanical friction and acceleration limitations. This substitution directly addresses the throughput bottleneck by enabling faster, smoother substrate movement between processing chambers without the speed constraints of traditional vacuum robots.
Solution Approach 2:
The patent introduces a dual-rail magnetic levitation system with upper and lower rails positioned at different vertical dimensions. This three-dimensional arrangement provides enhanced stability and control for substrate transfer, allowing the moving plate to maintain precise positioning while reducing transfer time. The vertical dimension addition enables more efficient spatial utilization and faster transfer cycles compared to conventional planar mechanisms.
2Reliability
If magnetic levitation rails are used for substrate transfer, then transfer stability is improved, but device complexity increases due to the dual upper and lower rail configuration
Solution Approach 1:
The patent combines the upper and lower magnetic levitation rails into a single integrated moving plate assembly. The moving plate simultaneously supports both rail systems and the substrate transfer mechanism, merging multiple functions into one unified structure. This integration reduces the number of separate components and simplifies the overall system architecture while maintaining the stability benefits of dual-rail magnetic levitation.
Solution Approach 2:
The moving plate serves multiple functions: it supports the upper magnetic levitation rail, supports the lower magnetic levitation rail, and provides the mechanism for substrate transfer. This multi-functional design eliminates the need for separate structures for each function, reducing device complexity while achieving reliable stable transfer through the magnetic levitation system.
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
The apparatus achieves stable substrate transfer with improved throughput and reduced energy consumption by minimizing collisions and environmental mismatches, while protecting substrates from damage.
Implementation Method 1
a moving plate including an upper magnetic levitation rail and a lower magnetic levitation rail, a processing chamber disposed adjacent to the moving plate and configured to process a substrate, and a shuttle disposed between the upper magnetic levitation rail and the lower magnetic levitation rail, being moved on the moving plate
Data Source
AI summary
Disclosed is a substrate transfer apparatus including a moving plate including an upper magnetic levitation rail and a lower magnetic levitation rail, a processing chamber disposed adjacent to the moving plate and that processes a substrate, and a shuttle disposed between the upper magnetic levitation rail and the lower magnetic levitation rail, being moved on the moving plate, and that accommodates the substrate.