Maglev Substrate Transfer Across a Membrane for Clean Vacuum Handling
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Solution Overview
Problem
Conventional substrate transfer systems in semiconductor processing face challenges with large footprints, particle generation, and reduced throughput due to mechanical robots and conveyors, which affect vacuum environments and production efficiency.
Innovation Solution
Implementing magnetic levitation assemblies with membranes and stators to transport semiconductor substrates, eliminating the need for mechanical contact and reducing particle generation while increasing throughput by up to 50%.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional mechanical robots are used for substrate transfer, then substrate movement is achieved, but the system footprint becomes large and particle generation increases
Solution Approach 1:
The patent replaces conventional mechanical robots with a magnetic field-based transfer system. Magnets embedded in the substrate carrier interact with electromagnetic coils positioned in the process chamber to enable substrate movement without mechanical contact, eliminating the need for large robotic arms and reducing system footprint.
Solution Approach 2:
The patent extracts the mechanical robot component from the process chamber entirely. By using magnetic fields for substrate manipulation, the system removes the bulky mechanical infrastructure that previously occupied significant space within the vacuum chamber.
2Productivity
If conventional mechanical robots are used for substrate transfer, then substrate movement is achieved, but particle generation increases
Solution Approach 1:
The patent replaces mechanical contact-based transfer with magnetic field interaction. The substrate carrier with embedded magnets is actuated by electromagnetic coils without physical contact, eliminating particle generation from mechanical wear, friction, and contact that plagues conventional robotic systems.
3Productivity
If conventional conveyors are used in linear arrangement, then substrate transfer is achieved, but maintenance requirements increase and throughput is limited
Solution Approach 1:
The patent replaces mechanical conveyors with magnetic field-based actuation. Electromagnetic coils positioned around the process chamber can move the substrate carrier without mechanical contact, eliminating the complex mechanical components that require maintenance while enabling bidirectional movement for increased throughput.
4Productivity
If conventional conveyors are used in linear arrangement, then substrate transfer is achieved, but movement direction is limited to one direction
Solution Approach 1:
The patent implements dynamic bidirectional movement capability through magnetic field control. By selectively activating electromagnetic coils on different sides of the process chamber, the system can move the substrate carrier in either direction, providing flexibility that fixed unidirectional conveyors cannot achieve.
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 system reduces system footprint, minimizes contamination, and enhances processing efficiency by enabling faster substrate movement between process stations.
Implementation Method 1
magnetic levitation assembly for a processing station
Implementation Method 2
magnetic levitation system reduces system footprint, minimizes contamination
Data Source
AI summary
A station for a substrate processing system that includes a magnetic levitation actuator assembly disposed in a first region of the station that is separated from a second region of the station by a membrane. The magnetic levitation actuator assembly is configured to contactlessly convey a carrier disposed in the second region to one or more positions within the second region.