Maglev Substrate Transfer Chamber for Multi-Directional Vacuum Routing
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Solution Overview
Problem
Conventional substrate transfer systems in semiconductor manufacturing are limited by their linear and rectangular arrangement, which restricts substrate movement to only one direction, requires a large footprint, and has a large internal volume, making them inefficient and difficult to service within vacuum environments.
Innovation Solution
A magnetic levitation platform with multiple tracks, including longitudinal and lateral tracks, allows substrates to be moved in multiple directions within a transfer chamber without breaking vacuum, enabling random access to process chambers and load locks, with substrate carriers configured to rotate at junctions between tracks, reducing the system's footprint and vacuum volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a linear and rectangular arrangement is used for substrate transfer, then the system structure is simple, but substrate movement is restricted to one direction and the footprint is large
Solution Approach 1:
The patent transitions from a linear one-dimensional substrate transfer path to a two-dimensional grid arrangement with longitudinal and lateral tracks. This allows substrate carriers to move not only along the length of the transfer chamber but also laterally to access different process chambers, thereby increasing movement flexibility while maintaining a compact footprint.
Solution Approach 2:
The system employs dynamically controllable magnetic levitation tracks that can independently adjust their operational status. Individual tracks or segments can be activated or deactivated based on real-time substrate transfer requirements, enabling flexible routing adaptations without physical reconfiguration and reducing the active footprint at any given time.
2Volume of stationary object
If conventional substrate carriers are used, then the system is easy to manufacture, but the internal volume is large and maintenance is difficult
Solution Approach 1:
The transfer system is divided into modular track segments and substrate carrier units that can be independently accessed and serviced. Each magnetic levitation track can be maintained separately, and substrate carriers can be removed and serviced outside the vacuum environment, significantly improving maintenance accessibility while reducing the overall vacuum volume required.
Solution Approach 2:
The patent replaces conventional mechanical contact-based substrate transfer mechanisms with magnetic levitation technology. This eliminates physical wear and friction, reduces the complexity of mechanical components within the vacuum chamber, and allows for more compact track designs, thereby reducing vacuum volume while improving maintainability through non-contact operation.
3Productivity
If multiple magnetic levitation tracks are used, then substrate flow flexibility is enhanced, but the device complexity increases
Solution Approach 1:
The magnetic levitation tracks are designed with multi-functionality, serving both as support structures and as active propulsion systems. The same track infrastructure enables both longitudinal and lateral substrate movement, and individual track segments can perform multiple routing functions, thereby increasing substrate throughput without proportionally increasing system complexity.
Solution Approach 2:
The patent combines the functions of multiple separate transfer mechanisms into a unified magnetic levitation track system. Instead of using separate conveyors for different directions, a single integrated track network handles all substrate movement, reducing the number of independent systems and simplifying control while maintaining high productivity.
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 magnetic levitation platform enhances substrate flow flexibility, reduces the system's footprint and vacuum volume, and simplifies maintenance, while maintaining the vacuum environment, thereby improving substrate throughput and processing efficiency.
Implementation Method 1
a magnetic levitation platform, comprising: a first magnetic levitation track disposed along a length of the transfer chamber and configured to generate a first magnetic field above the first magnetic levitation track
Data Source
AI summary
Disclosed herein are systems and methods relating to a transfer chamber for an electronic device processing system. The transfer chamber includes a first magnetic levitation platform, having a magnetic levitation track disposed along a horizontal length of the transfer chamber and configured to generate a first magnetic field. The transfer chamber also includes a second magnetic levitation track disposed along a horizontal width of the transfer chamber and configured to generate a second magnetic field. A first plane of the first magnetic field crosses a second plane of the second magnetic field at a junction. The platform further includes at least one substrate carrier configured to move according to at least one of the first magnetic field or the second magnetic field.