Semiconductor Rail Port Layout to Reduce Vehicle Congestion

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Solution Overview

Problem

Congestion occurs in the interface zone of semiconductor fabricating plants due to the inefficient movement of vehicles transporting articles between fabrication facilities, leading to operational delays and reduced efficiency.

Innovation Solution

The article transport system incorporates a rail unit with strategically positioned in-ports and out-ports, where in-ports are placed before out-ports in the direction of vehicle travel, and vehicles move forward rather than backward, optimizing the flow through entry and exit lanes in the interface zone.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If vehicles transport articles between fabs by moving forward only and returning long distances when loading fails, then vehicle operational simplicity is improved, but transport time and congestion increase

Engineering Contradiction:

Improvevehicle operational simplicityVSAvoidtransport time

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The patent inverts the traditional port arrangement by placing in-ports before out-ports in the vehicle's traveling direction. This reversal allows vehicles to perform loading operations at out-ports located at the end of the travel path, eliminating the need to return long distances when loading fails, thus reducing transport time while maintaining operational simplicity

Inventive Principle:

Principle #13The other way round (Inversion)

2Productivity

If vehicles continuously move without stopping at loading/unloading places, then vehicle productivity is improved, but loading/unloading operation completion may be compromised

Engineering Contradiction:

Improvevehicle productivityVSAvoidloading/unloading operation completion

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent implements preliminary action by positioning in-ports before out-ports in the vehicle's traveling direction. This arrangement allows vehicles to complete loading operations at out-ports before continuing their journey, ensuring reliable loading/unloading completion while maintaining continuous movement and high productivity

Inventive Principle:

Principle #10Preliminary action

3Productivity

If in-ports are disposed after out-ports in vehicle traveling direction, then vehicle can load articles efficiently, but vehicle must travel backward or return long distances

Engineering Contradiction:

Improveloading efficiencyVSAvoidvehicle travel distance

Core Design Contradiction:

ProductivityVSLength of moving object

Solution Approach 1:

The patent applies inversion by reversing the conventional port arrangement order. Instead of placing in-ports after out-ports, the system positions in-ports before out-ports in the vehicle's traveling direction. This allows vehicles to load articles at out-ports located at the end of their travel path, maintaining loading efficiency while eliminating the need for backward travel or long-distance returns

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentUS20250191947A1Article transport facility

Publication Date: 2025.06.12 SYSTEM ENGINEERING MEGA SOLUTION CO LTD

AI summary

An article transport system provided in a semiconductor fabricating plant, includes: a rail unit along which a vehicle moves; and a port module including one or more in-ports provided in the rail unit so that an article unloaded from the vehicle is disposed and one or more out-ports provided in the rail unit so that an article loaded to the vehicle is disposed, wherein the in-port is disposed prior to the out-port based on a direction in which the vehicle travels forward.