Jurnal

Modeling, analysis and control of dual-arm cluster tools with residency time variation basd on petri nets

---

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 addresses their real-time operational issues. To characterize their schedulability and achieve the minimum cycle time at their steady-state operation, Petri net (PN) models are developed to describe them, which are very compact, and independent of wafer flow pattern. It is due to the proposed models that scheduling cluster tools is converted into determining robot wait times. A two-level operational architecture is proposed to include an offline periodic schedule and real-time controller. The former determines when a wafer should be placed into a process module for processing, while the latter regulates robot wait times online in order to reduce the effect of activity time variation on wafer sojourn times in process modules. Therefore, the system can adapt to activity time variation. A cluster tool derived as a not-always-schedulable system by the existing methods is shown to be always-schedulable by using the proposed novel method.

---

Ketersediaan

Informasi Detail

Judul Seri

-

No. Panggil

620.11 NAI m

Penerbit

China : IEEE., 2012

Deskripsi Fisik

-

Bahasa

Indonesia

ISBN/ISSN

1545-5955

Klasifikasi

620.11 NAI m

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

Vol. 9

Subjek

Robots
Semiconductor device modeling
Automated manufacturing system
Cluster_tools
Petri_net
discrete event system
Optimization
Scheduling
Semiconductor_fabrication
Load_modeling
Tome_factors
Real-time system
system_recovery

Info Detail Spesifik

-

Pernyataan Tanggungjawab

-

Versi lain/terkait

Lampiran Berkas

Komentar

---

Anda harus masuk sebelum memberikan komentar