Multistage AGV Loader Layout for Compact Fab Transfer
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Solution Overview
Problem
The challenge in semiconductor manufacturing is to minimize production time and space between fabrication lines while ensuring efficient transfer of articles, which is hindered by the need for paths between these lines, leading to high overhead costs and long production times.
Innovation Solution
An automated guided vehicle (AGV) with a loader/unloader system that includes multiple article supports, an elevating unit, and a rotation unit, allowing for multistage loading and unloading of articles, and a height adjuster with flexible members to optimize positioning and reduce footprint, enabling efficient transfer between fabrication facilities without rotating the vehicle body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fabrication lines are placed close together to minimize production time and space, then productivity and space utilization improve, but the need for transfer paths between lines increases complexity and overhead costs
Solution Approach 1:
The patent combines multiple article support platforms (first and second platforms) into a single vehicle body, allowing simultaneous loading and unloading operations. The loader can transfer articles between platforms without requiring external transfer paths, effectively merging the transfer function into the vehicle itself. This resolves the contradiction by eliminating the need for complex external transfer infrastructure while maintaining high productivity.
Solution Approach 2:
The loader is positioned within the vehicle body and can operate between nested platforms. The first and second platforms are arranged vertically or horizontally within the confined space of the vehicle body, with the loader nested between them to perform transfer operations. This nested arrangement allows complex transfer operations to occur within a compact structure, reducing external path requirements.
2Productivity
If a loader system with multiple article supports is added to enable multistage loading, then loading efficiency and space utilization improve, but the device complexity and structural requirements increase
Solution Approach 1:
The loading system is segmented into discrete functional units: multiple article support platforms (first platform, second platform), a loader with transfer mechanism, and an elevating unit. Each component performs a specific function and can be independently controlled. This segmentation allows the complex loading operation to be broken down into manageable steps while maintaining overall system efficiency.
Solution Approach 2:
The elevating unit provides dynamic height adjustment capability, allowing the loader and platforms to adapt their positions during loading and unloading operations. This dynamic positioning enables flexible multistage loading configurations without requiring complex fixed structural arrangements, resolving the contradiction between loading efficiency and structural complexity.
3Adaptability or versatility
If the vehicle body is designed to accommodate multistage loading operations, then article transfer capability improves, but the vehicle footprint and manufacturing costs increase
Solution Approach 1:
The patent utilizes vertical space by arranging article support platforms at different heights or levels within the vehicle body. The elevating unit enables movement between these vertical levels, transforming a two-dimensional loading problem into a three-dimensional solution. This dimensional change allows multistage loading capability without proportionally increasing the horizontal footprint of the vehicle.
Data Source
AI summary
An automated guided vehicle with a multistage loading structure includes a vehicle body, and a loader in the vehicle body and operative to load articles in a multistage manner. The loader has a loading unit that is positioned between the articles loaded in the multistage manner and separately loads the articles. The loading unit moves up and down.