Petri nets and automatic control: A historical perspective
The goal of this paper is to overview the historical development of the field of Petri nets
(PNs) from a Systems Theory and Automatic Control perspective. It is intentionally not meant …
(PNs) from a Systems Theory and Automatic Control perspective. It is intentionally not meant …
Scheduling cluster tools in semiconductor manufacturing: Recent advances and challenges
Cluster tools are automated robotic manufacturing systems containing multiple computer-
controlled process modules. They have been increasingly used for wafer fabrication. This …
controlled process modules. They have been increasingly used for wafer fabrication. This …
Petri net modeling and cycle-time analysis of dual-arm cluster tools with wafer revisiting
There are wafer fabrication processes in cluster tools that require wafer revisiting. If a swap
strategy is applied to dual-arm cluster tools handling wafer revisiting, a three-wafer …
strategy is applied to dual-arm cluster tools handling wafer revisiting, a three-wafer …
Optimal one-wafer cyclic scheduling and buffer space configuration for single-arm multicluster tools with linear topology
This work studies the scheduling problem of a single-arm multicluster tool with a linear
topology and process-bound bottleneck individual tool. The objective is to find a one-wafer …
topology and process-bound bottleneck individual tool. The objective is to find a one-wafer …
Scheduling of single-arm cluster tools for an atomic layer deposition process with residency time constraints
In semiconductor manufacturing, there are wafer fabrication processes with wafer revisiting.
Some of them must meet wafer residency time constraints. Taking atomic layer deposition …
Some of them must meet wafer residency time constraints. Taking atomic layer deposition …
Polynomial approach to optimal one-wafer cyclic scheduling of treelike hybrid multi-cluster tools via Petri nets
A treelike hybrid multi-cluster tool is composed of both single-arm and dual-arm cluster tools
with a treelike topology. Scheduling such a tool is challenging. For a hybrid treelike multi …
with a treelike topology. Scheduling such a tool is challenging. For a hybrid treelike multi …
Petri net modeling and scheduling of a close-down process for time-constrained single-arm cluster tools
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 …
engineers to perform its on-demand and preventive maintenance and switch between …
A closed-form solution for schedulability and optimal scheduling of dual-arm cluster tools with wafer residency time constraint based on steady schedule analysis
Because of wafer residency time constraints for cluster tools, it is very difficult to schedule
them. This paper addresses their scheduling issues and conducts their schedulability and …
them. This paper addresses their scheduling issues and conducts their schedulability and …
Optimal scheduling of multicluster tools with constant robot moving times, part I: Two-cluster analysis
In semiconductor manufacturing, finding an efficient way for scheduling a multicluster tool is
critical for productivity improvement and cost reduction. This two-part paper analyzes optimal …
critical for productivity improvement and cost reduction. This two-part paper analyzes optimal …
Noncyclic scheduling of cluster tools with a branch and bound algorithm
Cluster tools, each of which consists of multiple processing modules, one material handling
robot, and loadlocks, are widely used for wafer fabrication processes, such as lithography …
robot, and loadlocks, are widely used for wafer fabrication processes, such as lithography …