Semiconductor Bullet Lot Dispatch System Optimization
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Solution Overview
Problem
Existing semiconductor bullet lot dispatch methods are cursory and fail to optimize manufacturing capacity and process constraints, leading to inefficient allocation and management of resources in semiconductor fabrication plants.
Innovation Solution
A real-time dispatch system that includes a bullet lot arriving time initial module, port remaining time initial module, future constraint check module, and bullet lot scenario engine module to calculate and match bullet lots with available load ports, ensuring timely and efficient dispatch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a manual check method is used to dispatch bullet lots, then the system is simple to operate, but the manufacturing capacity and resource allocation efficiency are insufficient
Solution Approach 1:
The patent introduces a computer system as an intermediary between the operator and the lot dispatch process. The computer system automatically calculates bullet lot arriving time intervals, determines port next available time intervals, and generates optimal dispatch sequences, replacing manual check methods while maintaining ease of operation through a user-friendly interface.
Solution Approach 2:
The patent replaces the mechanical manual checking process with an automated computer-based system that uses algorithms to calculate time intervals and determine dispatch sequences. This substitution eliminates manual labor in the dispatch decision-making process while significantly improving productivity and resource allocation efficiency.
2Productivity
If bullet lots are prioritized for immediate processing, then the yield and manufacturing capacity improve, but the resource allocation becomes inefficient and normal manufacturing processes are disturbed
Solution Approach 1:
The patent performs preliminary calculations of bullet lot arriving time intervals and port next available time intervals before actual dispatch decisions are made. This advance planning allows the system to identify optimal dispatch windows that prioritize bullet lots while maintaining stability in normal manufacturing processes by avoiding conflicts with scheduled operations.
Solution Approach 2:
The patent implements a dynamic dispatch sequence that adapts to changing conditions in real-time. The system continuously monitors bullet lot arrivals and port availability, adjusting the dispatch sequence dynamically to balance the priority of bullet lots with the stability requirements of ongoing normal manufacturing processes.
3Loss of time
If multiple load ports are used to process bullet lots simultaneously, then the waiting time is reduced, but the resource allocation becomes complex and management difficulty increases
Solution Approach 1:
The patent segments the bullet lot dispatch process into distinct time intervals based on calculated arriving time intervals and port next available time intervals. Each load port is assigned to specific time windows, creating a structured allocation pattern that reduces waiting time while maintaining manageable complexity through clear temporal boundaries.
Solution Approach 2:
The patent uses parameter changes in the form of time interval calculations to optimize multi-port allocation. By calculating and adjusting bullet lot arriving time intervals and port next available time intervals, the system dynamically determines optimal dispatch timing for multiple ports, reducing waiting time while maintaining allocation simplicity through mathematical optimization.
Data Source
AI summary
A semiconductor bullet lot dispatch system is provided. The semiconductor bullet lot dispatch system includes a plurality of lots having bullet lots and non-bullet lots, and a processing site having a plurality of load ports used to run the lots. The semiconductor bullet lot dispatch system also includes a bullet lot arriving time initial module configured to collect work flow information of the lots and calculate bullet lot arriving time intervals; and a port remaining time initial module configured to calculate port next available time intervals. Further, the semiconductor bullet lot dispatch system includes a future constraint check module configured to match the bullet lots with the load ports, and a bullet lot scenario engine module configured to calculate a total available lot count of each of available load ports and dispatch the bullet lots to the load ports.