Decentralized Substrate Handling via Inert Gas Flow Control
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Solution Overview
Problem
Current semiconductor processing systems face inefficiencies due to high substrate throughput limitations, costly and unreliable cluster tools, and excessive substrate handling steps, which increase manufacturing costs and defect rates.
Innovation Solution
A decentralized substrate handling and processing system utilizing inert gas flow-controlled valves and position detection sensors to move substrates through substrate transfer vias and processing chambers without robots, minimizing moving parts and enabling flexible, modular, and parallel processing architectures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If articulating robots are used to move substrates in cluster tools, then substrate transfer is achieved, but system cost increases, reliability decreases, and contaminant particles are generated
Solution Approach 1:
The patent removes the robot mechanism entirely from the substrate transfer system. Instead of using articulating robots to move substrates between chambers, the system uses direct mechanical coupling and coordinated motion of chamber carriers to achieve substrate transfer, eliminating the complex robot mechanism and its associated reliability issues
Solution Approach 2:
The patent replaces the robotic mechanical system with a coordinated mechanical carrier system. The chambers and carriers are mechanically coupled in a sequence where motion of one carrier automatically transfers substrates to the next chamber without requiring robotic intervention, substituting a simpler mechanical coordination system for the complex robot system
2Productivity
If cluster tools with limited chambers are used, then system size is reduced, but substrate throughput decreases and processing time increases
Solution Approach 1:
The patent divides the processing system into multiple independent chamber-carrier units that can be arranged in sequence. Each chamber is coupled to a carrier that can move independently, allowing the system to be extended by adding more chamber-carrier units without requiring a complete system redesign, thereby increasing throughput while maintaining a compact footprint
Solution Approach 2:
The patent arranges chambers and carriers in a linear sequence along a motion path, utilizing the spatial dimension efficiently. The carriers move along a defined trajectory transferring substrates between chambers in sequence, maximizing throughput within a compact linear footprint rather than requiring a large two-dimensional array of chambers
3Loss of time
If multiple substrate transfer steps are performed between atmospheric and vacuum conditions, then chamber access is enabled, but processing time increases and defect rates rise
Solution Approach 1:
The patent merges the substrate transfer function with the chamber carrier motion system. The substrate carrier that moves chambers in and out of the vacuum environment also serves as the substrate transport mechanism, combining what would otherwise be separate transfer operations into a single coordinated motion, thereby reducing the number of discrete transfer steps
Solution Approach 2:
The patent introduces the chamber carrier as an intermediary mechanism that bridges atmospheric and vacuum environments. The carrier maintains a sealed interface between the two environments, allowing substrates to be transferred through the pressure boundary as part of the chamber's regular motion cycle rather than requiring separate transfer operations
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
This approach reduces costs, minimizes contaminant particles, enhances reliability, and increases throughput by eliminating the need for complex robots and mechatronics, while allowing for flexible and efficient processing paths.
Implementation Method 1
multiple flow-controlled valves configured to: inject inert gas through a floor of the first substrate transfer via and move the substrate in a predetermined direction with reference to the position within the first substrate transfer via by adjusting a pressure of the inert gas underneath the substrate
Implementation Method 2
multiple position detection sensors to detect a position of a substrate in the first substrate transfer via
Implementation Method 3
A lift is physically connected to the lower enclosure and is to raise the lower enclosure into the processing chamber
Implementation Method 4
An exhaust channel, formed within the second post, is to purge process waste after processing
Data Source
AI summary
An electronics manufacturing system includes a first substrate transfer via having position detection sensors to detect a position of a substrate in the first substrate transfer via and flow-controlled valves to inject inert gas through a floor and move the substrate in a predetermined direction with reference to the position within the first substrate transfer via by adjusting a pressure of the inert gas underneath the substrate. A processing chamber is coupled to the first substrate transfer via and having a pedestal with apertures and flow-controlled devices to inject inert gas through the apertures to receive the substrate from the first substrate transfer via and move the substrate into a second substrate transfer via after processing of the substrate.