Overhead Stocker Layout for Faster Substrate Container Transfer
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Solution Overview
Problem
Semiconductor manufacturing lines face inefficiencies in substrate processing operations due to limited space and high costs of additional operations, leading to low processing speed and stagnation of transfer trolleys, which hinder smooth logistics movement.
Innovation Solution
A stocker device with a loading unit and a container transfer device is positioned above load ports, featuring shelves for storage and a transfer robot with horizontal and vertical driving units to optimize container transfer operations, minimizing space occupation and facilitating easy maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If additional transfer trolleys are operated to increase logistics capacity, then throughput can be improved, but space requirements and operational costs increase significantly
Solution Approach 1:
The patent introduces a vertical dimension by positioning the container transfer device above the load ports, utilizing three-dimensional space instead of horizontal expansion. This allows multiple containers to be stored and transferred vertically, increasing logistics capacity without occupying additional floor space.
Solution Approach 2:
The container transfer device is nested within the existing substrate processing apparatus structure, with the transfer robot and driving units integrated into the vertical space above the load ports. This nested configuration maximizes space utilization without requiring external infrastructure.
2Productivity
If additional transfer trolleys are operated to increase logistics capacity, then throughput can be improved, but operational costs increase
Solution Approach 1:
The container transfer device performs multiple functions: storing containers on vertical shelves, transferring containers between shelves and load ports, and coordinating with ceiling transfer trolleys. This multi-functional design replaces the need for additional dedicated transfer trolleys, reducing operational costs while maintaining increased throughput.
Solution Approach 2:
The container transfer device autonomously manages container storage and transfer operations using its integrated transfer robot and driving units, reducing the need for external transfer trolleys and associated operational overhead.
3Speed
If container transfer operations are optimized, then processing speed is improved, but system complexity increases
Solution Approach 1:
The container transfer device is segmented into functional modules: a transfer robot for container manipulation, horizontal driving units for lateral movement, and vertical driving units for vertical movement. This modular segmentation enables optimized transfer operations while managing complexity through standardized, interchangeable components.
4Ease of repair
If loading unit is made movable for maintenance access, then ease of maintenance is improved, but structural complexity increases
Solution Approach 1:
The loading unit is designed with movable characteristics, allowing it to be repositioned or accessed from different angles for maintenance purposes. This dynamic design enables easy maintenance while the modular structure keeps the added complexity manageable through standardized movement mechanisms.
Data Source
AI summary
Disclosed is a stocker device provided on a front face of a substrate processing apparatus in which load ports are placed horizontally, the stocker device including: a loading unit located in front of the load ports and including shelves configured to store substrate accommodation containers; and a main frame including a container transfer device configured to transfer the substrate accommodation container between the shelves and the load port, in which the container transfer device is located above the load ports.