Maglev Substrate Transfer for Low-Particle Process Stations
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Solution Overview
Problem
Conventional substrate transfer systems in semiconductor processing face challenges with particle generation, large footprint, and limited throughput due to the use of robotic arms and mechanical conveyors.
Innovation Solution
The implementation of magnetic levitation assemblies to transport substrates between process stations, eliminating the need for robotic arms and reducing mechanical contact, thereby minimizing particle generation and footprint while increasing throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If conventional robotic arms are used to transfer substrates, then substrate transfer can be achieved, but particle generation increases and footprint becomes large
Solution Approach 1:
The patent replaces conventional mechanical robotic arms with a magnetic field-based transfer mechanism. The magnetic field applies force to the substrate through the carrier without mechanical contact, eliminating particles from mechanical components while achieving the same substrate transfer function.
Solution Approach 2:
The patent introduces a magnetic field as an intermediary between the transfer mechanism and the substrate. The magnetic field serves as the mediating force that enables substrate manipulation without direct mechanical contact, reducing particle generation from mechanical interfaces.
2Object-generated harmful factors
If mechanical conveyors are used for substrate transport, then substrate movement between chambers is enabled, but particle contamination increases
Solution Approach 1:
The patent replaces mechanical conveyor systems with magnetic field-based substrate transport. The magnetic field propels the substrate through the carrier without mechanical contact, eliminating particle contamination from mechanical conveyor components while maintaining transport functionality.
3Productivity
If conventional robotic transfer systems are used, then substrate transfer is achieved, but throughput is limited
Solution Approach 1:
The patent enables continuous substrate transfer operations using magnetic field actuation. Multiple substrates can be transferred in sequence without the mechanical repositioning and acceleration/deceleration cycles required by robotic arms, significantly reducing transfer time and increasing throughput.
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
Magnetic levitation reduces particle contamination, decreases system footprint, and enhances throughput by up to 50% compared to conventional systems, leading to lower capital and operational costs.
Implementation Method 1
a magnetic levitation assembly disposed in the transport region configured to levitate and propel a substrate carrier
Implementation Method 2
The magnetic levitation assembly includes a first track segment including first rails disposed in the transport region and below the process region, wherein the first rails each include a first plurality of magnets
Data Source
AI summary
A substrate process station includes a housing including a transport region and process region. The process station further includes a magnetic levitation assembly disposed in the transport region configured to levitate and propel a substrate carrier. The magnetic levitation assembly includes a first track segment including first rails disposed in the transport region and below the process region, wherein the first rails each include a first plurality of magnets. The process station further includes a pedestal assembly comprising a pedestal disposed within the housing. The pedestal is moveable between a pedestal transfer position and a process position, wherein the pedestal is disposed between the first rails in the pedestal transfer position to receive a substrate from the substrate carrier, and wherein the pedestal is moveable between the first rails to position the received substrate in the process region in the process position.