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 …

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 …

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 …

Wafer delay analysis and control of dual-armed cluster tools with chamber cleaning operations

TS Yu, TE Lee - International Journal of Production Research, 2020 - Taylor & Francis
As the design of integrated circuits has become increasingly complicated and dense,
serious wafer quality problems are observed in modern wafer fabrication facilities …

Post-processing time-aware optimal scheduling of single robotic cluster tools

QH Zhu, Y Qiao, NQ Wu, Y Hou - IEEE/CAA Journal of …, 2020 - ieeexplore.ieee.org
Integrated circuit chips are produced on silicon wafers. Robotic cluster tools are widely used
since they provide a reconfigurable and efficient environment for most wafer fabrication …

Feedback control of cluster tools for regulating wafer delays

C Kim, TE Lee - IEEE Transactions on Automation Science and …, 2015 - ieeexplore.ieee.org
Robotized cluster tools for semiconductor manufacturing have strict time constraints such
that a wafer processed at a processing chamber should be unloaded within a specified time …

Scheduling transient processes for time-constrained single-arm robotic multi-cluster tools

QH Zhu, MC Zhou, Y Qiao… - IEEE Transactions on …, 2017 - ieeexplore.ieee.org
Multi-cluster tools are highly productive yet expensive wafer fabricating facility in
semiconductor industry. Current competitive business trend requires high-mix and low …

Optimal cyclic scheduling of wafer-residency-time-constrained dual-arm cluster tools by configuring processing modules and robot waiting time

J Wang, C Liu, MC Zhou, T Leng… - IEEE Transactions on …, 2023 - ieeexplore.ieee.org
Optimal cyclic scheduling problems of wafer-residency-time-constrained dual-arm cluster
tools in wafer fabrication are challenging and remain to be fully solved. Existing studies …

Petri net modeling and scheduling of a close-down process for time-constrained single-arm cluster tools

QH Zhu, MC Zhou, Y Qiao… - IEEE Transactions on …, 2016 - ieeexplore.ieee.org
In wafer fabrication, a robotic cluster tool is required to be closed down in order for
engineers to perform its on-demand and preventive maintenance and switch between …

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 …