Wafer sojourn time fluctuation analysis of time-constrained dual-arm cluster tools with wafer revisiting and activity time variation

Y Qiao, NQ Wu, FJ Yang, MC Zhou… - IEEE Transactions on …, 2016 - ieeexplore.ieee.org
A robotic cluster tool involves many activities whose time is subject to some disturbance,
thus leading to the activity time variation. It results in wafer sojourn time fluctuation in a …

Petri net modeling and wafer sojourn time analysis of single-arm cluster tools with residency time constraints and activity time variation

Y Qiao, NQ Wu, MC Zhou - IEEE Transactions on …, 2012 - ieeexplore.ieee.org
With wafer residency time constraints, it is crucial to schedule a cluster tool in semiconductor
fabrication such that the wafer sojourn time in a processing module is in a given range …

Modeling, analysis and control of dual-arm cluster tools with residency time constraint and activity time variation based on Petri nets

NQ Wu, MC Zhou - IEEE Transactions on Automation Science …, 2012 - ieeexplore.ieee.org
Because of residency time constraints and activity time variation of cluster tools, it is very
difficult to operate such integrated semiconductor manufacturing equipment. This paper …

Analysis of wafer sojourn time in dual-arm cluster tools with residency time constraint and activity time variation

NQ Wu, MC Zhou - IEEE Transactions on Semiconductor …, 2010 - ieeexplore.ieee.org
When scheduling cluster tools under wafer residency time constraints, wafer sojourn time in
a processing module should be carefully controlled such that it is in a permissive range …

Reducing wafer delay time by robot idle time regulation for single-arm cluster tools

WQ Xiong, CR Pan, Y Qiao, NQ Wu… - IEEE Transactions …, 2020 - ieeexplore.ieee.org
Nowadays, wafer fabrication in semiconductor manufacturing is highly dependent on cluster
tools. A cluster tool is equipped with several process modules (PMs) and a wafer handling …

Robust scheduling of time-constrained dual-arm cluster tools with wafer revisiting and activity time disturbance

Y Qiao, NQ Wu, FJ Yang, MC Zhou… - IEEE Transactions on …, 2017 - ieeexplore.ieee.org
Wafer revisiting and residency time constraints complicate the scheduling problem of cluster
tools in semiconductor manufacturing. Random disturbance to the activity time in operating a …

Schedulability analysis and optimal scheduling of dual-arm cluster tools with residency time constraint and activity time variation

NQ Wu, MC Zhou - IEEE Transactions on Automation Science …, 2011 - ieeexplore.ieee.org
With wafer residency time constraint of cluster tools in semiconductor manufacturing, activity
time variation can make an originally feasible schedule infeasible. Thus, it is difficult to …

Response policies to process module failure in single-arm cluster tools subject to wafer residency time constraints

Y Qiao, CR Pan, NQ Wu… - IEEE Transactions on …, 2014 - ieeexplore.ieee.org
In semiconductor manufacturing, wafer residency time constraints make the scheduling
problem of cluster tools complicated. A process module (PM) in cluster tools is prone to …

Petri net-based scheduling of single-arm cluster tools with reentrant atomic layer deposition processes

NQ Wu, F Chu, C Chu, MC Zhou - IEEE Transactions on …, 2010 - ieeexplore.ieee.org
For some wafer fabrication processes in cluster tools, eg, atomic layer deposition (ALD),
wafer revisiting is required. Typically, in such processes, wafers need to visit two …

Optimal one-wafer cyclic scheduling of time-constrained hybrid multicluster tools via Petri nets

FJ Yang, NQ Wu, Y Qiao… - IEEE Transactions on …, 2016 - ieeexplore.ieee.org
Scheduling a multicluster tool with wafer residency time constraints is highly challenging yet
important in ensuring high productivity of wafer fabrication. This paper presents a method to …