Maglev Substrate Transfer Assembly for Low-Particle Wafer Handling

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional substrate transfer systems in semiconductor processing face challenges with particle generation, large footprint, and reduced throughput due to mechanical robots and conveyors, which affect product quality 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 contamination while enabling a more compact design and increased throughput.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If conventional mechanical robots are used for substrate transfer, then substrate transfer function is achieved, but particle generation increases and footprint becomes large

Engineering Contradiction:

Improveparticle generationVSAvoidrobot mechanism

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent replaces the conventional mechanical robot system with a magnetic field-based transfer mechanism. Magnets embedded in the substrate carrier interact with magnetic sensors and actuators on the transfer mechanism, enabling contactless substrate handling that eliminates particle generation from mechanical contact while reducing system footprint.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces magnetic fields as an intermediary between the transfer mechanism and substrate carrier. This magnetic intermediary enables force transmission without physical contact, replacing direct mechanical interaction and thereby eliminating particle contamination from mechanical contact.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Area of stationary object

If conventional mechanical robots are used for substrate transfer, then substrate transfer function is achieved, but system footprint increases

Engineering Contradiction:

Improvesystem footprintVSAvoidrobot mechanism

Core Design Contradiction:

Area of stationary objectVSDevice complexity

Solution Approach 1:

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Productivity

If conventional conveyors are used in linear arrangement, then substrate transfer is achieved, but throughput is limited due to single-direction movement

Engineering Contradiction:

ImprovethroughputVSAvoidconveyor movement

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The patent implements a dynamic substrate transfer system where carriers can be independently accelerated, decelerated, and redirected using magnetic fields. This dynamic control enables multiple carriers to move in different directions simultaneously, allowing substrates to be transferred to multiple process chambers concurrently and significantly increasing throughput.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent divides the substrate transfer system into multiple independent carrier units, each capable of independent magnetic field-controlled movement. This segmentation allows different carriers to operate independently in different directions and speeds, enabling parallel substrate transfers to multiple chambers and improving overall throughput.

Inventive Principle:

Principle #1Segmentation

4Object-affected harmful factors

If conventional conveyors are used in linear arrangement, then substrate transfer is achieved, but particle generation increases

Engineering Contradiction:

Improveparticle generationVSAvoidthroughput

Core Design Contradiction:

Object-affected harmful factorsVSProductivity

Solution Approach 1:

The patent replaces the conventional mechanical conveyor system with a magnetic field-based transfer mechanism. Magnets embedded in the substrate carrier interact with magnetic sensors and actuators on the transfer mechanism, enabling contactless substrate handling that eliminates particle generation from mechanical contact.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical 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

Magnetic levitation reduces particle generation, minimizes system footprint, and enhances throughput by up to 50% compared to conventional systems, thereby improving product quality and reducing operational costs.

Implementation Method 1

magnetic levitation assemblies with membranes and stators to transport semiconductor substrates, eliminating the need for mechanical contact

Methodology Applied

Scientific EffectMagnetic levitation: Maglev

Data Source

PatentUS20250336704A1Semiconductor process equipment

Publication Date: 2025.10.30 APPLIED MATERIALS INC

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.