Substrate Transfer Sequencing for Higher Processing Module Utilization
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Solution Overview
Problem
Conventional substrate processing apparatuses face inefficiencies due to predetermined queuing and transferring orders of substrates, leading to underutilization of processing modules and decreased productivity in manufacturing integrated circuit devices.
Innovation Solution
A substrate processing apparatus with a processing module unit, a transfer module unit, and a sequence adjustment unit that optimizes the queuing and transferring of substrates based on the availability of process equipment, allowing for flexible prioritization and utilization of idle transfer modules to improve efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If substrates are queued and transferred to processing modules in a predetermined order, then the process sequence is simple to manage, but the utilization efficiency of processing modules decreases
Solution Approach 1:
The patent implements dynamic process sequence adjustment by introducing a sequence adjustment unit that monitors the status of processing modules and transfer modules in real-time. This unit dynamically reorders the queuing and transferring sequence of substrates based on current system state, allowing the system to adapt to changing conditions and maximize processing module utilization while maintaining manageable complexity through automated control.
2Device complexity
If a predetermined transfer order is used for substrates, then the control system is simple, but the substrate transfer time increases
Solution Approach 1:
The patent employs feedback mechanisms where the sequence adjustment unit continuously monitors the operational status of processing modules and transfer modules, then uses this feedback information to dynamically adjust the substrate transfer sequence. This closed-loop control optimizes transfer time by routing substrates through idle or soon-to-be-idle transfer modules, while the automated nature of the feedback system prevents excessive complexity in the control architecture.
3Stability of the object's composition
If substrates are processed in a fixed sequence, then the manufacturing process is stable and predictable, but the responsiveness to equipment availability changes is reduced
Solution Approach 1:
The patent reconciles stability and adaptability by implementing dynamic sequence adjustment that operates within a controlled framework. The sequence adjustment unit maintains process stability through systematic monitoring and adjustment protocols while simultaneously adapting to equipment availability changes by reordering substrate transfer sequences based on real-time module status, thus achieving both predictability and responsiveness.
Solution Approach 2:
The system achieves self-service by having the sequence adjustment unit autonomously monitor processing module and transfer module status, then automatically reorder substrate transfer sequences without external intervention. This self-adjusting mechanism maintains manufacturing stability while adapting to equipment availability changes, reducing the need for manual control while preserving process predictability through systematic automated decision-making.
Data Source
AI summary
A substrate processing apparatus includes first and second processing modules, first and second transfer modules for queuing and transferring a first substrate, which can only be fed into the first processing module, a second substrate, which can only be fed into the second processing module, respectively, and a sequence adjustment unit. The first or second transfer module can be used to queue and transfer a third substrate that can be loaded into both the first and second processing modules. The sequence adjustment unit adjusts the process sequence such that at least some of the first, second, and third substrates, which are junior to a substrate being processed in the process sequence, are prioritized for queuing and transferring using the first or second transfer module that is in an idle state or about to become an idle state.