High Density Substrate Stocker with Interlocking Nubs
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Solution Overview
Problem
Current substrate storage systems, such as FOUPs, face inefficiencies due to design limitations that can contaminate substrates, cause chafing, and hinder loading/unloading processes, leading to bottlenecks in semiconductor manufacturing. They are also cumbersome for high-density storage and scaling, requiring multiple parts and steps, which diminishes processing efficiency.
Innovation Solution
A high-density substrate stocker system with a storage chamber, opener stations, and robots for efficient storage and retrieval, allowing for flexible stacking and separation of substrates, and integration with Equipment Front End Modules (EFEMs) for seamless transfer and handling, ensuring minimal contamination and optimized storage and processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional FOUPs are used for substrate storage, then substrate protection from contamination is improved, but storage density and processing efficiency deteriorate due to design limitations and multiple construction parts
Solution Approach 1:
The substrate storage system is divided into multiple independent modules (storage modules, transfer modules, processing modules) that can operate autonomously. Each module handles specific tasks, allowing parallel operations and eliminating bottlenecks in traditional FOUP systems, thereby improving processing efficiency while maintaining substrate protection through modular cleanroom-sealed designs.
Solution Approach 2:
Multiple substrates are stacked vertically within compact storage modules, with each substrate positioned on a carrier that can be individually accessed. This nested stacking arrangement dramatically increases storage density compared to traditional horizontal FOUP layouts, allowing more substrates to be stored in the same footprint without compromising protection or access efficiency.
2Reliability
If traditional FOUP construction with multiple parts is used, then substrate containment is achieved, but storage density and scalability worsen due to cumbersome design
Solution Approach 1:
The containment system is segmented into modular storage units, each with its own sealed environment. These modules can be stacked and configured in various arrangements to maximize storage density while maintaining individual containment integrity. The modular design allows scalable expansion without requiring complete system redesign.
Solution Approach 2:
The system transitions from traditional two-dimensional horizontal substrate arrangement to three-dimensional vertical stacking. Multiple substrates are arranged in vertical columns within each storage module, utilizing the vertical dimension to dramatically increase storage capacity within the same floor space while maintaining proper containment and accessibility.
3Reliability
If traditional FOUP loading and unloading methods are used, then substrate transfer is achieved, but processing speed deteriorates due to bottlenecks in the system
Solution Approach 1:
The substrate transfer process is segmented into multiple parallel transfer paths with dedicated transfer robots for different substrate types and destinations. This eliminates the single-point bottleneck in traditional FOUP systems, allowing multiple substrates to be transferred simultaneously through different modules, thereby dramatically increasing processing speed while maintaining reliable transfer capability.
Solution Approach 2:
Substrates are pre-positioned on carriers within storage modules in advance of processing needs. The system prepares substrate stacks and organizes them by processing sequence beforehand, so that when transfer is needed, substrates are already in optimal positions for rapid extraction and transfer, eliminating delays associated with searching and repositioning during actual transfer operations.
4Quantity of substance
If high-density vertical stacking is implemented, then storage capacity is improved, but substrate separation and access become more difficult
Solution Approach 1:
Each vertically stacked substrate is positioned on its own independent carrier module with individual access mechanisms. The segmentation allows transfer robots to extract and separate any substrate from the vertical stack without disturbing others, maintaining ease of operation despite high-density stacking. Each module can be independently accessed, positioned, and transferred through automated guidance systems.
Data Source
AI summary
A substrate stocker system includes a high-density storage chamber that comprises one or more stacks of one or more substrates in a closed position, one or more low density containers that are configured to store one or more substrates in an open position, one or more opener stations that are configured to receive one or more substrates and includes one or more separator modules for changing one or more distances between corresponding one or more adjacent substrates. The substrate stocker system further includes a first robot configured to move one or more stacks between the high-density storage chamber, and the one or more opener station, and a second robot configured to move the individual one or more substrates between the one or more opener stations and the one or more low density containers.